ASSESSMENT Flashcards by Gregorio Mahinay III

Which commercial grade of chromite ore (FeCr 2 O 4 ) is primarily used for high-temperature refractory applications, a use supported by its characteristic high alumina content, typically ranging from 20%to30% by weight?
a. Refractory
b. Metallurgical
c. Chemical
d. Foundry

a. Refractory

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Which grade of chromite ore is highly valued for its high chromium-to-iron ratio and high Cr2O3 content (45–53 wt%), making it the primary source material for producing ferrochromium used in stainless steel and alloy manufacturing?
a. Refractory
b. Metallurgical
c. Chemical
d. Foundry

b. Metallurgical

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Which chromite grade is designated for processing into sodium dichromate (Na2Cr2O7), an intermediate compound critical for industrial applications such as leather tanning, wood preservation, and the formulation of corrosion-inhibiting pigments?
a. Refractory
b. Metallurgical
c. Chemical
d. Foundry

c. Chemical

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Which grade of chromite is used as a highly refractory sand for creating molds and cores in metal casting due to its excellent thermal stability, high heat transfer rate, and low thermal expansion, ensuring a smooth surface finish on cast metal products?

a. Refractory
b. Metallurgical
c. Chemical
d. Foundry

d. Foundry

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Which term describes a pre-existing mineral deposit where heat, pressure, and/or deformation from subsequent geological events have caused the physical and chemical transfer and reconcentration of the original metallic minerals into a new, often higher-grade, location?

a. Remobilized deposit
b. Cyprus-type copper deposit
c. Kuroko-type copper deposit
d. Porphyry copper deposit

a. Remobilized deposit

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Which type of copper deposit is characteristically associated with a large, intrusive igneous body and is defined by a distinct, often concentric zoning pattern of both copper-bearing mineralization and associated hydrothermal alteration minerals?
a. Remobilized deposit
b. Cyprus-type copper deposit
c. Kuroko-type copper deposit
d. Porphyry copper deposit

d. Porphyry copper deposit

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Which class of volcanogenic massive sulfide (VMS) deposit is formed in association with seafloor spreading centers at divergent plate boundaries, where the circulation of heated seawater through oceanic crust leaches and precipitates metals to form pillow lava-hosted ores?

a. Remobilized deposit
b. Cyprus-type copper deposit
c. Kuroko-type copper deposit
d. Porphyry copper deposit

b. Cyprus-type copper deposit

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Which type of volcanogenic massive sulfide (VMS) deposit, originally named after deposits in Japan, is characterized by distinct, vertical mineral zones that typically include a ‘black ore’ (zinc-lead-silver-gold rich) and a ‘yellow ore’ (pyrite-chalcopyrite rich), forming in shallow submarine volcanic settings?

a. Remobilized deposit
b. Cyprus-type copper deposit
c. Kuroko-type copper deposit
d. Porphyry copper deposit

c. Kuroko-type copper deposit

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The economic value of a mineral resource, which dictates whether a deposit qualifies as an ore body, is traditionally defined by a combination of which factors?
a. Geological knowledge (Reserves)
b. Profitability
c. Available mining technology
d. Efficient metallurgical technology
e. All of the above

e. All of the above

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Which key factor represents the quantified and verified portion of a mineral deposit that can be legally and economically extracted at the time of assessment, establishing the foundation for mine planning and valuation?

a. Geological knowledge (Reserves)
b. Profitability
c. Available mining technology
d. Efficient metallurgical technology

a. Geological knowledge (Reserves)

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From a purely economic standpoint, what is the most critical factor determining whether a mineral deposit is classified as an ore (meaning it is worth mining) rather than just a mineralized material?

a. Geological knowledge (Reserves)
b. Profitability
c. Available mining technology
d. Efficient metallurgical technology

b. Profitability

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In the valuation of a low-grade, deep-seated mineral deposit, which factor is crucial for determining the technical feasibility and cost per tonne of extraction, especially considering depth, rock competency, and deposit geometry?

a. Geological knowledge (Reserves)
b. Profitability
c. Available mining technology
d. Efficient metallurgical technology

c. Available mining technology

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Which relatively modern, interdisciplinary field connects the geological environment to human and animal health, specifically studying the influence of geological materials (e.g., dust, radon, trace elements) and processes (e.g., volcanism) on disease and health patterns?

a. Biogeochemistry
b. Toxicology
c. Geobotany
d. Medical Geology

d. Medical Geology

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Which factor directly impacts the recovery rate and product quality from a mineral processing plant, thus influencing the final revenue stream and overall viability of a mine by determining how much saleable product can be extracted from the mined ore?

a. Geological knowledge (Reserves)
b. Profitability
c. Available mining technology
d. Efficient metallurgical technology

d. Efficient metallurgical technology

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Which scientific discipline integrates biology, chemistry, and geology to study the cycling of elements and compounds between the biotic (life) and abiotic (rocks, atmosphere, hydrosphere) components of the Earth’s system, focusing on global-scale environmental processes?

a. Biogeochemistry
b. Toxicology
c. Geobotany
d. Medical Geology

a. Biogeochemistry

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Which field of science specifically focuses on the study of poisons and the adverse effects of chemical substances (whether natural or synthetic) on living organisms, including the mechanisms of action, symptoms, treatments, and risk assessment?

a. Biogeochemistry
b. Toxicology
c. Geobotany
d. Medical Geology

b. Toxicology

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Which sub-discipline of botany and geology uses the study of plant growth, color, form, or presence/absence in specific areas to directly infer the underlying geological conditions, such as the presence of certain minerals or chemical anomalies in the soil?

a. Biogeochemistry
b. Toxicology
c. Geobotany
d. Medical Geology

c. Geobotany

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The uranium mineral, Uraninite (UO2), found within the iron-rich district of Larap, Jose Panganiban, Camarines Norte, Philippines, is characteristically associated with which type of contact metamorphic ore body, which forms through the reaction of hot fluids with carbonate rocks?
a. Skarn
b. Gossans
c. Pyrometasomatic iron deposits
d. None of the above

a. Skarn

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What is the term for the highly oxidized, porous, and iron-rich surface layer that forms above a deeply buried sulfide-bearing mineral deposit due to the weathering and leaching of sulfides near the water table?

a. Skarn
b. Gossans
c. Porphyry
d. Alteration halo

b. Gossans

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Which specific classification is given to iron ore deposits, such as those historically mined at Larap, that are formed by high-temperature metasomatism occurring at the contact between an intrusive igneous body and surrounding host rocks?

a. Skarn (general term)
b. Laterite iron deposits
c. Pyrometasomatic iron deposits
d. Bog iron deposits

c. Pyrometasomatic iron deposits

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If a metallic mineral deposit were primarily formed by low-temperature, near-surface geothermal waters rather than high-temperature magma-derived fluids, the deposit would most likely be classified as a type of which deposit?

a. Skarn
b. Pyrometasomatic deposit
c. Porphyry deposit
d. Epithermal deposit

d. Epithermal deposit

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The highly oxidized, porous, and iron-rich capping that forms over a sulfide mineral deposit near the surface, known to geologists as a gossan, is also historically referred to by which synonymous mining term?
a. Brown iron
b. Iron earth
c. Iron hat
d. Limonite cap

c. Iron hat

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The general term brown iron ore is a historical name often used to refer to which hydrated iron oxide mineral (FeO(OH)⋅nH2O) that is a common component of gossans and bog ores?
a. Brown iron
b. Red iron
c. Grey iron
d. Black iron

a. Brown iron (historical term for limonite/goethite)

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Which descriptive, non-technical term refers generally to any soil or unconsolidated sediment that is heavily saturated or stained with iron oxides and hydroxides, making it appear reddish, yellowish, or brown?

a. Iron rust
b. Iron earth
c. Iron slag
d. Iron rock

b. Iron earth

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Which specific term, synonymous with gossan, refers to the chemically altered, iron-oxide-rich surface layer and is used by prospectors as a visual indicator of potential underlying sulfide mineralization? a. Iron head b. Iron top c. Iron crown d. Limonite cap

d. Limonite cap

Which category of geohazard most accurately classifies a seiche, a phenomenon where an earthquake's seismic waves passing through an area generate standing waves in an enclosed or semi-enclosed body of water like a lake, reservoir, or harbor? a. Coastal flooding event b. Seismic-related hazard c. Climate change phenomena d. Hydrologic hazard e. All of the above

b. Seismic-related hazard

Which geohazard category best describes the inundation of low-lying areas along a shoreline due to factors like storm surge, tsunamis, or extreme high tides? a. Coastal flooding event b. Mass movement hazard c. Meteorological hazard d. Hydrologic hazard

a. Coastal flooding event

The long-term sea-level rise and the increasing frequency of extreme precipitation events are primarily classified under which overarching geohazard category that modifies existing risks? a. Tectonic hazard b. Geophysical hazard c. Climate change phenomena d. Geochemical hazard

c. Climate change phenomena

A hazard primarily resulting from the behavior of water, such as a river flood, a rapid-onset flash flood, or the failure of a dam due to excessive rainfall, falls under which main classification? a. Geomorphic hazard b. Atmospheric hazard c. Seismic-related hazard d. Hydrologic hazard

d. Hydrologic hazard

Which option is the appropriate choice when considering the full range of potential hazards impacting coastal communities, including tsunamis (seismic), storm surge (meteorological/coastal flooding), and river runoff (hydrologic)? a. Coastal flooding event b. Seismic-related hazard c. Hydrologic hazard d. Meteorological hazard e. All of the above

e. All of the above

Which of the following natural phenomena involves the inundation of dry land by a mass of water or a water-saturated mixture and is therefore considered a type of flooding event? a. Storm surge b. Seiche c. River overflow d. Lahar flow e. All of the above

e. All of the above

Which type of flooding is caused by the rise in sea level above the normal high tide, primarily driven by the strong winds and low atmospheric pressure associated with a severe tropical storm or hurricane? a. Storm surge b. Tsunami c. Seiche d. Lahar flow

a. Storm surge

What is the term for a standing wave oscillation generated in a partially or fully enclosed body of water (like a bay or lake) that can be triggered by rapid atmospheric pressure changes, wind, or seismic activity? a. Wave bore b. Seiche c. Tsunami d. Rip current

b. Seiche

Which form of flooding occurs when the volume of water carried by a stream or river exceeds the capacity of its channel, causing water to spread onto the adjacent floodplain? a. Pluvial flooding b. Coastal flooding c. River overflow d. Groundwater flooding

c. River overflow

Which specific type of catastrophic volcanic hazard consists of a hot or cold mixture of water, rock debris, and ash that rapidly flows down a volcano's slopes and river valleys, behaving similarly to a flash flood? a. Pyroclastic flow b. Debris avalanche c. Lava flow d. Lahar flow

d. Lahar flow

Which chemical form of mercury (Hg) is considered the most hazardous to human health due to its ability to readily bioaccumulate in aquatic food webs and easily cross the blood-brain barrier? a. Methyl mercury b. Inorganic Hg compounds c. Metallic Hg d. Elemental Hg

a. Methyl mercury

Which form of mercury, typically found in mining waste and industrial effluents, primarily causes toxicity by damaging the kidneys and gastrointestinal tract after ingestion? a. Methyl mercury b. Inorganic Hg compounds c. Metallic Hg vapor d. Hg sulfide (cinnabar)

b. Inorganic Hg compounds (e.g., mercuric chloride, HgCl2)

Which form of mercury, historically used in dentistry (amalgam) and thermometers, poses a significant health risk when it is volatilized at room temperature and inhaled, leading to nervous system damage? a. Methyl mercury b. Inorganic Hg compounds c. Metallic Hg vapor d. Hg sulfide (cinnabar)

c. Metallic Hg (or Liquid Hg)

Which common name is used to describe pure, unreacted mercury (Hg) that exists as a dense, silver-white liquid metal at standard temperature and pressure? a. Ionic mercury b. Sublimated mercury c. Organic mercury d. Elemental Hg

d. Elemental Hg

Which specific location in the Philippines hosts the largest open-pit coal deposit in the country and was the first to utilize a high-capacity bucket wheel excavator for continuous coal extraction? a. Malangas, Zamboanga b. Semirara Island c. Batan Island

b. Semirara Island

The coal deposits in Malangas, Zamboanga, which historically supplied the first integrated steel mill in the country, are predominantly characterized by which geological setting? a. Malangas, Zamboanga b. Semirara Island c. Batan Island

a. Malangas, Zamboanga (Known for high-grade bituminous coal)

Which Philippine island is historically known for its small-scale coal mining operations, where the coal is typically of a sub-bituminous rank and primarily used by local industries or power plants in the Bicol region? a. Malangas, Zamboanga b. Semirara Island c. Batan Island

c. Batan Island

The Philippines is a world leader in geothermal energy production. Which of the following sites currently represents the largest developed geothermal production area in the country, contributing the greatest overall installed capacity? a. Negros b. Southern Luzon c. Leyte d. Davao

c. Leyte

Which geothermal production site is found in the Visayas region and includes the Palinpinon-Balasbalas area, which provides a significant portion of the base-load power for the island of Negros? a. Negros b. Southern Luzon c. Leyte d. Davao

a. Negros

Which region encompasses the highly developed geothermal fields of Tiwi (Albay) and Mak-Ban (Laguna-Batangas), making it a major historical and current contributor to the energy grid of the Philippines' main island? a. Negros b. Southern Luzon c. Leyte d. Davao

b. Southern Luzon

Which of the following elements, a key component in laterite deposits, is a characteristic and often abundant trace element within the primary structure of ultramafic rocks (like peridotite) before weathering and concentration occur? a. Nickel (Ni) b. Cobalt (Co) c. Chromium (Cr)

a. Nickel (Ni)

Which metallic element, often occurring alongside nickel, is concentrated up to ten times its original value in the laterite weathering profile of ultramafic rock, rising from approximately 150 ppm in the protolith? a. Nickel b. Cobalt c. Chromium d. Magnesium

b. Cobalt (Co)

Which metal's primary ore mineral, chromite (FeCr2O4), forms podiform deposits that constitute about half of the world's production and are typically hosted within the mantle peridotites of ophiolite sequences? a. Nickel b. Cobalt c. Chromium d. Copper

c. Chromium (Cr)

In the idealized, concentric pattern of hydrothermal alteration surrounding a porphyry-type copper deposit, which alteration zone is characteristically the innermost and has the strongest spatial correlation with the highest concentrations of primary ore mineralization? a. Potassic b. Phyllic c. Argillic d. Propylitic

a. Potassic

Which intermediate-temperature hydrothermal alteration zone, located outside the potassic core, is characterized by the breakdown of feldspars into sericite (fine-grained white mica), along with quartz and pyrite, and is often associated with the main ore shell? a. Potassic b. Phyllic c. Argillic d. Propylitic

b. Phyllic (or Sericitic)

Which low-temperature, near-surface hydrothermal alteration zone is defined by the intense destruction of feldspars into clay minerals (like kaolinite and smectite) and is typically situated farther away from the intrusive center, often reflecting groundwater interaction? a. Potassic b. Phyllic c. Argillic d. Propylitic

c. Argillic

Which geophysical technique measures local anomalies in the Earth's magnetic field to map subsurface features based on variations in magnetic susceptibility, making it excellent for tracing igneous intrusions, iron ore, or certain mafic/ultramafic rocks? a. Gravity b. Magnetics c. Electrical Resistivity d. Induced Polarization

b. Magnetics

Which is the outermost and lowest-temperature alteration zone in a porphyry system, characterized by the assemblage of chlorite, epidote, calcite, and minor pyrite, which often represents a broad regional halo surrounding the more intense inner zones? a. Potassic b. Phyllic c. Argillic d. Propylitic

d. Propylitic

A vein system consisting of two or more distinct vein segments that are connected by a separate, often cross-cutting, fracture or vein segment is best described as a: a. En échelon vein b. Linked vein c. Ladder vein d. Sheeted vein

b. Linked vein

What term is used for a set of overlapping, stepped, and individually short vein segments that are oriented obliquely (at an angle) to the overall trend of the larger shear or fault zone that controls their formation? a. En échelon vein b. Linked vein c. Chambered vein d. Sheeted vein

a. En échelon vein

Which term is used to describe a mineral deposit style characterized by a series of closely spaced, parallel, and distinct vein structures that are often formed by repeated brittle fracturing and fluid flow in a relatively uniform stress field? a. En échelon vein b. Linked vein c. Chambered vein d. Dilation vein e. Sheeted vein

e. Sheeted vein

Which specific term, often used in structural geology, describes a complex vein structure characterized by irregular, bulbous openings or open cavities that are larger than the typical vein width, often indicating fluctuations in fluid pressure during formation? a. Sheeted vein b. Linked vein c. Chambered vein d. Tension crack vein

c. Chambered vein

Which geophysical technique measures minute variations in the Earth's gravitational field to detect and map subsurface density contrasts, making it highly effective for locating massive sulfide bodies or structures like salt domes? a. Gravity b. Magnetics c. Reflectivity d. Electromagnetics

a. Gravity

Which of the following methods provides the most direct, in-situ measurements of a mineral deposit's physical properties (such as resistivity, density, and natural gamma ray) necessary for detailed subsurface characterization? a. Gravity b. Magnetics c. Reflectivity d. Bore-hole e. None of the above

d. Bore-hole (or Downhole Logging)

What is the general term for a vein that forms perpendicular to the direction of maximum compressive stress (σ1) and opens primarily due to the pull-apart movement (extension or stretching) of the host rock? a. Shear vein b. Linked vein c. Contraction vein d. Dilation vein

d. Dilation vein (or Extension vein)

Which seismic method uses reflected acoustic energy waves to create high-resolution images of subsurface geological layers and structures, primarily used in oil and gas exploration but also applicable to mapping coal or deep mineral targets? a. Gravity b. Magnetics c. Reflectivity d. Downhole Logging

c. Reflectivity (Seismic Reflection)

If a geophysical survey is designed to detect disseminated sulfide mineralization by measuring the time-dependent decay of voltage after an induced current is shut off, the technique used is: a. Ground Penetrating Radar (GPR) b. Magnetic Resonance Sounding c. Self-Potential d. Seismic Refraction e. Induced Polarization

e. Induced Polarization

Which passive geophysical method measures naturally occurring electrical voltages on the Earth's surface, often utilizing the electrokinetic effect (streaming potential) produced by the movement of groundwater or other fluids through subsurface permeable materials? a. Self-potential (SP) b. Induced Polarization (IP) c. Hydrogeology d. Electromagnetic (EM)

a. Self-potential (SP)

Which active geophysical method involves injecting an electrical current into the ground and then measuring the decay of the induced voltage after the current is shut off, making it highly effective for detecting disseminated sulfide mineralization? a. Self-potential (SP) b. Induced Polarization (IP) c. Magnetics d. Seismic Refraction

b. Induced Polarization (IP)

Which scientific discipline focuses on the study of the distribution, movement, and quality of water below the Earth's surface, including the processes of groundwater recharge, discharge, and flow in aquifers? a. Geophysics b. Geochemistry c. Hydrogeology d. Meteorology

c. Hydrogeology

Which broad category of geophysical techniques utilizes the principle of measuring secondary magnetic fields generated by the induction of electrical currents within subsurface conductors, making it effective for mapping massive sulfide bodies and graphite? a. Self-potential (SP) b. Gravity c. Seismic Reflection d. Electromagnetic (EM)

d. Electromagnetic (EM)

The geophysical methods of seismic reflection and refraction are overwhelmingly the most common and powerful techniques used to map deep subsurface structures and stratigraphy, making them essential in which specific type of exploration? a. Mineral b. Groundwater c. Petroleum d. Cement e. None of the above

c. Petroleum

While seismic methods can be used, which geophysical method is typically the most effective and widely used for the direct mapping of massive sulfide ore bodies due to their high electrical conductivity? a. Mineral b. Groundwater c. Petroleum d. Cement

a. Mineral (Exploration often uses IP, EM, and Magnetics)

Which geophysical method is commonly used for shallow surveys to map the water table, identify potential aquifer layers, and determine the depth to bedrock for groundwater exploration? a. Mineral b. Groundwater c. Petroleum d. Cement

b. Groundwater (Exploration often uses ER and GPR)

Exploration for which industrial commodity primarily focuses on delineating large, readily accessible deposits of high-purity limestone and shale, often relying on detailed geological mapping and drilling rather than complex seismic methods? a. Mineral b. Groundwater c. Petroleum d. Cement

d. Cement (Raw material exploration)

If an exploration program is looking for a shallow, non-metallic resource where the primary goal is to map the thickness and extent of gravel and sand deposits, which combination of shallow geophysical methods would be most appropriate? a. Seismic Reflection and Gravity b. Magnetics and Electromagnetics c. IP and Self-Potential d. GPR and Seismic Refraction e. Electrical Resistivity Tomography (ERT)

d. Electrical Resistivity Tomography (ERT) and Ground Penetrating Radar (GPR)

Magnetic Force is _________ proportional to the square of the polar distance. a. directly b. inversely c. not d. sometimes e. none of the above

b. inversely

What is the general term for any area of the Earth's crust that is prone to frequent or particularly powerful earthquakes, regardless of whether the earthquakes are shallow or deep? a. Seismic zone b. Aseismic zone c. Wadati-Benioff zone d. Fault trace

a. Seismic zone

Which volcanic feature is caused by a persistent plume of hot mantle material rising from deep within the Earth, resulting in a stationary source of magma that generates a chain of progressively older volcanoes as the plate moves over it? a. Island arc b. Subduction zone c. Mid-ocean ridge d. Hotspot

d. Hotspot

Radioactivity is a property _________ to certain elements. a. Accorded b. offered c. shared d. inherent

d. inherent (existing in something as a permanent)

What is the term for the inclined plane or linear zone of deep-seated earthquake foci that seismically delineates the subducting oceanic lithosphere as it plunges downward beneath an overriding plate, typically associated with deep-sea trenches? a. Seismic zone b. Island arc c. Wadati-Benioff zone d. Trench e. Hotspot

c. Wadati-Benioff zone

A chain of volcanic islands, such as the Marianas or the Philippines, that forms on the overriding plate approximately parallel to the deep-sea trench is referred to as a(n): a. Continental shelf b. Island arc c. Hotspot track d. Back-arc basin

b. Island arc

Which large, linear, and deepest bathymetric feature on the seafloor marks the surface expression of the boundary where one tectonic plate begins its descent beneath another in a subduction zone? a. Oceanic plateau b. Mid-ocean ridge c. Fracture zone d. Trench

d. Trench (Deep-sea trench)

The Earth's mantle, which constitutes about 84% of the planet's volume, is composed primarily of which dense, ultramafic igneous rock? a. Lava b. Asthenosphere c. Basalt d. Peridotite e. Magma

d. Peridotite

Which specific layer of the upper mantle, characterized by its high ductility and ability to slowly flow, allows the overlying lithospheric plates to move? a. Lithosphere b. Asthenosphere c. Mesosphere d. Outer core

b. Asthenosphere

What is the term for molten rock that has reached the Earth's surface through a volcanic vent or fissure? a. Lava b. Asthenosphere c. Peridotite d. Magma

a. Lava

What is the most common volcanic rock found forming the oceanic crust and the surfaces of many shield volcanoes, characterized by its fine-grained, mafic composition? a. Peridotite b. Granite c. Basalt d. Shale

c. Basalt

What is the term for molten rock found beneath the Earth's surface, often containing dissolved gases and suspended crystals? a. Lava b. Igneous rock c. Peridotite d. Magma

d. Magma

In a strike-slip fault, which type of movement is defined by the observation that the block on the opposite side of the fault has moved to the left relative to the observer? a. Sinistral fault b. Dextral fault c. Strike-slip fault d. Transcurrent fault e. Oblique-slip fault

a. Sinistral fault

Which type of fault is defined by having the opposite block appear to move to the right relative to the observer, indicating a right-lateral sense of movement? a. Sinistral fault b. Dextral fault c. Dip-slip fault d. Transcurrent fault

b. Dextral fault

What is the general term for a fault where the dominant movement of the blocks is horizontal (parallel to the fault's strike) with minimal vertical displacement? a. Dip-slip fault b. Normal fault c. Strike-slip fault d. Thrust fault

c. Strike-slip fault

Which specific term is often used synonymously with strike-slip fault to describe large, regional-scale faults that typically extend vertically through the crust and exhibit large horizontal displacements? a. Normal fault b. Transform fault c. Reverse fault d. Transcurrent fault

d. Transcurrent fault

What is the classification for a fault where the movement vector of the blocks has a significant component of both horizontal (strike-slip) and vertical (dip-slip) displacement? a. Pure strike-slip fault b. Pure dip-slip fault c. Transcurrent fault d. Oblique-slip fault

d. Oblique-slip fault

Which of the following common silicate minerals contains a substantial amount of iron (Fe) in its chemical structure, making it a primary source mineral for the formation of hematite (Fe2O3) and other iron oxides during chemical weathering? a. Pyroxene b. Orthoclase c. Plagioclase d. Quartz e. Albite

a. Pyroxene

Which potassium-rich mineral, a member of the feldspar group, weathers to form the clay mineral kaolinite and releases soluble potassium ions (K + ), which can contribute to soil fertility? a. Pyroxene b. Orthoclase c. Plagioclase d. Quartz

b. Orthoclase

Which series of feldspar minerals, spanning a solid solution from Na-rich to Ca-rich end-members, weathers through hydrolysis to form various clay minerals, a process that is often faster than the weathering of K-feldspars? a. Olivine b. Orthoclase c. Plagioclase d. Muscovite

c. Plagioclase

Which specific end-member of the plagioclase series is entirely sodium-rich (NaAlSi3O8) and is primarily composed of silicon, aluminum, and sodium, meaning it has essentially no iron content to form hematite? a. Anorthite b. Orthoclase c. Microcline d. Albite

d. Albite

Which extremely common and chemically stable silicate mineral (SiO2) is considered the most resistant to chemical weathering, often accumulating as residual sand grains in mature sediments? a. Pyroxene b. Calcite c. Feldspar d. Quartz

d. Quartz

An atmospheric window refers to a range of wavelengths in the electromagnetic spectrum where radiation, such as visible light or certain infrared bands, is minimally absorbed or scattered by atmospheric gases, allowing the energy to be largely: a. Absorbed b. Transmitted c. Translated d. Mutated

b. Transmitted

Which process primarily occurs to incoming solar radiation when it encounters gases like ozone and molecular oxygen (O2) in the upper atmosphere, preventing those specific wavelengths from reaching the surface? a. Absorbed b. Transmitted c. Reflected d. Refracted

a. Absorbed

When discussing the movement of a fluid parcel (like an air or water mass) in the atmosphere or ocean, the process by which the parcel is moved from one geographical location to another is described as being: a. Absorbed b. Transmitted c. Translated d. Diffused

c. Translated (or Advected)

In the context of atmospheric chemistry or physics, which term is entirely inappropriate for describing the interaction of electromagnetic energy with atmospheric gases? a. Absorbed b. Transmitted c. Scattered d. Mutated

d. Mutated

The Tubbataha Reefs Natural Park off the coast of Palawan is a UNESCO World Heritage Site renowned for its pristine atolls and high biodiversity. It is classified under national Philippine law and its international designation as a type of: a. Forest Park b. Marine Nature Reserve c. Heritage Coast d. Biosphere Reserve e. All of the above

b. Marine Nature Reserve

Which type of protected area is established primarily for the preservation of timber resources and the conservation of associated terrestrial wildlife, typically allowing limited ecotourism activities? a. Forest Park b. Wildlife Sanctuary c. Protected Seascape d. Critical Habitat

a. Forest Park

Which designation is applied to a stretch of scenic, relatively undeveloped coastline to protect its natural beauty and associated geological features, often allowing for public access and enjoyment? a. Exclusive Economic Zone b. Continental Shelf c. Heritage Coast d. Protected Seascape

c. Heritage Coast

Which international designation by UNESCO's Man and the Biosphere (MAB) Programme features a core area for conservation, a buffer zone, and a transition area for sustainable human use, aiming to balance conservation with sustainable development? a. World Heritage Site b. Ramsar Site c. Geopark d. Biosphere Reserve

d. Biosphere Reserve

The Palawan Province, which includes the Tubbataha Reefs, has been granted multiple protective designations by national and international bodies, including classifications as a Wildlife Sanctuary, a Natural Park, and a strategic zone. In the broadest sense of regional protection efforts, which option summarizes the collective range of conservation goals applied to the entire Palawan area? a. Forest Park b. Marine Nature Reserve c. Heritage Coast d. Biosphere Reserve e. All of the above

e. All of the above (Considering the diverse protected areas within the province.)

Globally, where is the overwhelming majority (approximately 69%) of the Earth's total freshwater supply sequestered and stored? a. Rivers b. Groundwater c. Ice sheets d. Rain e. Dams

c. Ice sheets

Which component of the hydrologic cycle holds the least amount of the world's freshwater at any given moment, yet is vital for immediate human and ecological use and has the highest rate of turnover? a. Rivers b. Ice sheets c. Groundwater d. Atmospheric vapor

a. Rivers

Excluding ice caps and glaciers, which reservoir contains the largest volume of readily accessible liquid freshwater that supplies most of the world's rural and agricultural needs? a. Rivers b. Groundwater c. Lakes d. Dams

b. Groundwater

Which temporary reservoir is the direct source of water for most terrestrial ecosystems and is formed by the condensation of atmospheric vapor, representing the primary input to both surface water and groundwater systems? a. Rivers b. Ice sheets c. Clouds d. Rain

d. Rain (Precipitation)

Which category of freshwater storage is considered entirely artificial and is created by human engineering to manage, store, and regulate river flow for purposes like irrigation, power generation, and flood control? a. Natural lakes b. Reservoirs created by tectonic processes c. Glacial lakes d. Dams

d. Dams (Man-made reservoirs)

In the context of the hydrologic cycle, which of the following terms correctly identifies the category that encompasses all forms of precipitation that serve as a source of freshwater originating directly from the atmosphere? a. Slits b. Rain c. Snow d. Hail e. All of the above

Which form of precipitation is characterized by liquid water droplets that are large enough to overcome atmospheric resistance and fall to the ground, representing the most common source of liquid freshwater? a. Slits b. Rain c. Snow d. Hail

b. Rain

Which type of precipitation consists of rain droplets that freeze into pellets of ice before reaching the ground, often occurring when a warm layer of air is sandwiched between two freezing layers? a. Slits b. Rain c. Snow d. Hail

a. Slits (Sleet)

Which solid form of precipitation consists of delicate, crystalline ice formations that develop when water vapor deposits directly onto ice crystals at sub-freezing temperatures within the clouds? a. Slits b. Rain c. Snow d. Hail

c. Snow

Which form of precipitation consists of large, hard, irregular lumps of ice that are formed by repeated cycles of accretion and freezing within the strong updrafts and downdrafts of a thunderstorm cloud? a. Slits b. Rain c. Snow d. Hail

d. Hail

Which of the following common metamorphic rock types is characteristically non-foliated (massive) because it typically forms through contact metamorphism under conditions of high temperature but low differential stress? a. Hornfels b. Slate c. Gneiss d. Phyllite e. Schist

a. Hornfels

Which low-grade, fine-grained metamorphic rock is characterized by excellent slaty cleavage, allowing it to be split into thin, smooth sheets, and is commonly formed from the metamorphism of shale? a. Hornfels b. Slate c. Schist d. Gneiss

b. Slate

Which high-grade metamorphic rock is defined by its pronounced gneissic banding, where alternating light (quartz/feldspar) and dark (mafic minerals) mineral layers have been segregated during intense regional metamorphism? a. Slate b. Marble c. Gneiss d. Quartzite

c. Gneiss

Which intermediate-grade metamorphic rock is finer-grained than schist but coarser than slate, exhibiting a distinct satin sheen (or phyllitic luster) due to the nearly microscopic alignment of mica crystals? a. Hornfels b. Quartzite c. Schist d. Phyllite

d. Phyllite

Which medium- to high-grade metamorphic rock is easily recognized by its coarse-grained texture and strong schistosity (a planar fabric caused by the parallel alignment of visible platy minerals like mica or chlorite)? a. Slate b. Quartzite c. Gneiss d. Schist

d. Schist

Using the seismic reflection technique, what property of the earth's subsurface is measured to map its layers? a) Attenuation, or the reduction in signal strength b) Density, or the mass per unit volume c) Seismic velocity, or the speed at which waves travel d) Acoustic impedance, or the product of density and seismic velocity

a) Attenuation, or the reduction in signal strength

What is considered one of the primary applications of the gravity method in geophysics? a) Oil and gas exploration b) Mineral exploration c) Engineering geology d) Archaeological surveys

a) Oil and gas exploration

The gravity method is effective for mineral exploration because it can detect which characteristic of a massive orebody? a) Its high magnetic permeability b) Its difference in density from surrounding rocks c) Its low electrical resistivity d) Its radioactive signature

b) Its difference in density from surrounding rocks

In seismic exploration, the travel time of a seismic wave is used to determine the depth of a reflector. The calculation requires knowing which physical property of the subsurface medium? a) Seismic velocity b) Magnetic susceptibility c) Thermal conductivity d) Electrical resistivity

a) Seismic velocity

Which electrical geophysical method would be the most suitable primary tool for mapping highly conductive, near-surface sulfide ore bodies (e.g., massive chalcopyrite)? a) magnetic b) resistivity c) self potential d) gravity

b) resistivity

Which geophysical method is used to detect natural voltage anomalies generated by the electrochemical oxidation-reduction of near-surface, electronically conductive ore bodies like massive sulfides? a) magnetic b) resistivity c) self potential d) gravity

c) self potential

In engineering geology, the gravity method is a useful tool for which of the following applications? a) Detecting shallow faults and buried bedrock b) Conducting detailed rock strength tests c) Analyzing the chemical composition of soil d) Mapping water table fluctuations at great depths

a) Detecting shallow faults and buried bedrock

Which type of remanence is acquired when a material is magnetized by an external magnetic field at constant temperature, typically used in rock magnetism labs to study magnetic mineral characteristics? A) Chemical remanent B) Depositional remanent C) Isothermal remanent D) Viscous remanent E) Thermo remanent

C) Isothermal remanent

Which geophysical method is best suited to directly locate a dense chromite deposit by detecting its high density contrast with the surrounding rock? a) magnetic b) resistivity c) self potential d) gravity

d) gravity

The gravity method is a common tool for regional-scale geological reconnaissance because it is effective at mapping the depth and configuration of what underlying feature? a) Tectonic plate boundaries b) The Earth's core-mantle boundary c) The crystalline basement rock d) Seismic wave velocity anomalies

c) The crystalline basement rock

Heavy rains are a common source of which type of environmental noise that can interfere with communication systems and electronic equipment? A) Magnetic noise B) Seismic noise C) Electrical noise D) Electromagnetic noise E) None of the above

C) Electrical noise

Which type of environmental noise is primarily caused by fluctuations in the Earth's magnetic field, often associated with solar activity or geomagnetically induced currents (GICs)? A) Magnetic noise B) Seismic noise C) Electrical noise D) Electromagnetic noise E) None of the above

A) Magnetic noise

Which natural phenomenon is a dominant source of transient electromagnetic noise (sferics) that spans a wide frequency spectrum and is caused by a massive electrostatic discharge in the atmosphere? A) Wind B) Waves C) Earthquake D) Lightning E) Solar flares

D) Lightning

Which type of background environmental disturbance is characterized by ground motion caused by natural phenomena like earthquakes, volcanic activity, or non-natural sources such as ocean waves and human activities? A) Magnetic noise B) Seismic noise C) Electrical noise D) Electromagnetic noise E) None of the above

B) Seismic noise

Which general category of environmental noise encompasses a wide spectrum of disturbances, including radio frequency interference (RFI) from sources like sparking motors, radio transmitters, and lightning strikes? A) Magnetic noise B) Seismic noise C) Electrical noise D) Electromagnetic noise E) None of the above

D) Electromagnetic noise

In the field of acoustics, which natural phenomenon is a common source of low-frequency noise and vibration (often called flow noise or microbaroms) generated by air movement past objects, sensors, or surfaces? A) Earthquake B) Wind C) Waves D) Lightning E) Volcanic activity

B) Wind

Which abrupt geological event is a primary source of intense seismic noise and ground motion, generating measurable P-waves, S-waves, and surface waves that travel through the Earth? A) Wind B) Waves C) Earthquake D) Lightning E) Solar activity

C) Earthquake

Which oceanographic phenomenon is a major contributor to seismic noise (microseisms) in the Earth's crust, generated by the interaction of pressure fluctuations on the seafloor? A) Tides B) Wind C) Tsunami D) Waves E) Rainfall

D) Waves

Due to the extremely high temperatures (exceeding the Curie temperature of iron-bearing minerals like magnetite), the silicate minerals that predominantly compose the upper mantle are virtually: A) Diamagnetic B) Ferromagnetic C) None of the above D) Paramagnetic E) Non-magnetic

D) Paramagnetic

Which magnetic property describes a material, such as iron or nickel , that exhibits a large, positive susceptibility to an external magnetic field and retains its magnetization even after the field is removed? A) Diamagnetic B) Paramagnetic C) Ferromagnetic D) Antiferromagnetic E) Non-magnetic

C) Ferromagnetic

or the purpose of interpreting large-scale magnetic surveys on Earth, the deep mantle, extending far below the crust, is generally treated as being practically what, due to temperatures exceeding the Curie point? A) Diamagnetic B) Paramagnetic C) Ferromagnetic D) Non-magnetic E) Conductive

D) Non-magnetic

Which magnetic property describes a material, such as pure gold or copper, that is slightly repelled by a magnetic field and has a small, negative magnetic susceptibility? A) Paramagnetic B) Ferromagnetic C) Diamagnetic D) Superconducting E) None of the above

C) Diamagnetic

Which type of remanent magnetization (RM) is acquired by magnetic minerals in a rock as they cool through their respective Curie or Néel temperatures in the presence of an ambient magnetic field? A) Depositional remanent B) Thermo remanent C) Viscous remanent D) Chemical remanent E) Isothermal remanent

B) Thermo remanent

Which type of remanence is locked into a sedimentary rock as magnetic grains settle and align with the ambient geomagnetic field during the final stage of deposition and before full lithification? A) Isothermal remanent B) Viscous remanent C) Thermo remanent D) Chemical remanent E) Depositional remanent

E) Depositional remanent

Which type of remanent magnetization is acquired slowly over time when a rock is subjected to a steady magnetic field at a temperature below its Curie point, often leading to a secondary, overprinted magnetization? A) Viscous remanent B) Thermo remanent C) Chemical remanent D) Depositional remanent E) Isothermal remanent

A) Viscous remanent

Which type of remanence is acquired when new magnetic minerals form or grow within a rock below the Curie or Néel temperature, such as during oxidation, weathering, or metamorphic reactions? A) Depositional remanent B) Viscous remanent C) Chemical remanent D) Isothermal remanent E) Thermo remanent

C) Chemical remanent

In gravimetry, which correction accounts for the change in gravity due to the vertical distance (elevation) of the observation station above or below the reference ellipsoid (usually mean sea level), assuming the space between is only air? A) Bouguer B) Free-air C) Terrain D) Tidal E) Isostatic

B) Free-air

Which gravity correction accounts for the gravitational effect of the mass (rock) located between the elevation of the station and the reference plane (like the mean sea level)? A) Bouguer B) Free-air C) Terrain D) Tidal E) Isostatic

A) Bouguer

Which gravity correction accounts for the anomalous gravitational effects caused by local topographic irregularities (hills above or valleys below) surrounding the observation station? A) Bouguer B) Free-air C) Terrain D) Tidal E) Isostatic

C) Terrain

Which gravity correction accounts for the time-dependent changes in the observed gravity reading caused by the varying gravitational pull of the Moon and Sun? A) Bouguer B) Free-air C) Terrain D) Tidal E) Isostatic

D) Tidal

Which geophysical concept, often applied as a residual correction in gravimetry, hypothesizes that large topographic features are supported by underlying variations in crustal density in a state of hydrostatic equilibrium? A) Bouguer B) Free-air C) Terrain D) Tidal E) Isostatic

E) Isostatic

Which electrical geophysical technique, often used in conjunction with Induced Polarization (IP), is critical in mapping the core alteration zones (low sulfide/potassic) and outer clay alteration (high sulfide/phyllic) associated with a porphyry copper deposit? A) Resistivity B) Electromagnetic C) Gravity D) Self potential E) None of the above

A) Resistivity

Which class of geophysical methods is most effective for detecting highly conductive massive sulfide bodies or thick graphitic zones, but is often less effective for the disseminated sulfides typical of many porphyry systems? A) Resistivity B) Electromagnetic C) Gravity D) Self potential E) None of the above

B) Electromagnetic

Which passive electrical method measures naturally occurring potential differences on the ground surface, often associated with the electrochemical oxidation of sulfide minerals located above the water table? A) Resistivity B) Electromagnetic C) Gravity D) Self potential E) None of the above

D) Self potential

Which geophysical technique is used to measure variations in the Earth's density, making it most suitable for delineating the outline of the large, low-density intrusive pluton often associated with a porphyry copper system? A) Resistivity B) Electromagnetic C) Gravity D) Self potential E) None of the above

C) Gravity

Which natural agent is responsible for creating hazards like glacial lake outburst floods (GLOFs), moraine dam failures, and the scouring of U-shaped valleys? a. River waters b. Glaciers c. Earthquake d. Volcanic eruption

b. Glaciers

Fluvial hazards, such as riverine flooding and bank erosion, are geological and environmental risks directly caused by the actions and processes of: a. River waters b. Glaciers c. Earthquake d. Volcanic eruption

a. River waters

Which geophysical phenomenon causes hazards such as ground rupture, liquefaction, tsunamis, and large-scale landslides? a. River waters b. Glaciers c. Earthquake d. Volcanic eruption

c. Earthquake

The following are characteristics of epithermal deposits except: a. They are most well known for the occurrences of gold and silver, as well as mercury, lead and copper. b. They are almost always localized near volcanic centers such as calderas, volcanic necks, breccia pipers and shallow intrusion. c. They occur in a wide range of geometries ranging from tabular veins to pipe-funnel shaped d. Banding of the ore and gangue minerals is common e. None of the above.

e. None of the above.

Which geological event produces primary hazards such as pyroclastic flows, lava flows, ash fall, and secondary hazards like lahars? a. River waters b. Glaciers c. Earthquake d. Volcanic eruption

d. Volcanic eruption

Which low-temperature, outermost alteration zone in a porphyry copper system is characterized by an assemblage of chlorite, epidote, calcite, and pyrite? A) Potassic alteration B) Phyllic alteration C) Propylitic alteration D) Quartz alteration E) None of the above

C) Propylitic alteration

In a concentric porphyry copper alteration zone, which alteration type is typically found outboard of the potassic core and is characterized by the presence of sericite (fine-grained muscovite) and abundant pyrite? A) Potassic alteration B) Phyllic alteration C) Propylitic alteration D) Quartz alteration E) None of the above

B) Phyllic alteration

Which magmatic process concentrates incompatible elements (like rare earth elements or certain metals) in the residual melt by removing early-formed, non-ore-bearing crystals from the magma? A) Gravitational settling B) Fractional crystallization C) Liquid immiscibility D) All of the above

B) Fractional crystallization

In the classic model of a porphyry copper deposit, which major hydrothermal alteration type is characterized by minerals like K-feldspar and biotite and occupies the innermost, highest-temperature core zone immediately adjacent to the intrusive center? A) Potassic alteration B) Phyllic alteration C) Propylitic alteration D) Quartz alteration E) None of the above

A) Potassic alteration

Which of the following processes is a recognized mechanism for the concentration of ore minerals during the formation of magmatic ore deposits? A) Gravitational settling B) Fractional crystallization C) Liquid immiscibility D) All of the above

D) All of the above

Which pair of terms correctly identifies both a large, coarse particle of native metal AND a fluvial sedimentary feature where placer gold typically accumulates? A) Nuggets B) Flakes C) Bars D) A and C E) None of the above

D) A and C

Which magmatic process is primarily responsible for the concentration of nickel-copper sulfide ores where a separate, dense, sulfide-rich melt separates from the primary silicate melt? A) Gravitational settling B) Fractional crystallization C) Liquid immiscibility D) All of the above

C) Liquid immiscibility

Which mineral is the primary gangue component and vein-forming material found in nearly all zones of a porphyry copper system (potassic, phyllic, and argillic), but is insufficient on its own to define the primary alteration type? A) Potassic alteration B) Phyllic alteration C) Propylitic alteration D) Quartz alteration E) None of the above

D) Quartz alteration

Which magmatic process involves high-density, early-forming crystals like chromite or magnetite sinking through the magma chamber to form a layer of concentrated ore at the base? A) Gravitational settling B) Fractional crystallization C) Liquid immiscibility D) All of the above

A) Gravitational settling

Which term, in the context of placer geology, refers to elongate accumulations of sediment (often coarse gravel) deposited by a river on its bed or in a shallow area, where placer minerals are often concentrated? A) Nuggets B) Flakes C) Bars D) A and C E) None of the above

C) Bars

In the context of placer mining, which term specifically refers to the large, discrete pieces of native metal (like gold) that are typically retained on a coarse screen (e.g., greater than 10 mesh)? A) Nuggets B) Flakes C) Bars D) A and C E) None of the above

A) Nuggets

Which of the following geological provinces in the Philippines is NOT traditionally recognized for significant large-scale gold mining operations? A) Southern Palawan B) Surigao del Norte C) Benguet Province D) Davao del Norte E) None of the above

A) Southern Palawan

Which province in the CARAGA region is famous for hosting large gold and nickel laterite deposits and includes historic mining areas like Placer and the Malampay Sound area? A) Southern Palawan B) Surigao del Norte C) Benguet Province D) Davao del Norte E) None of the above

B) Surigao del Norte

Which province in the Cordillera Central region is historically and currently the most significant source of lode gold in the Philippines, containing major deposits like the Acupan-Antamok Mines? A) Southern Palawan B) Surigao del Norte C) Benguet Province D) Davao del Norte E) None of the above

C) Benguet Province

Which province in the Davao region, along with its neighbor Davao de Oro (formerly part of this province), is a key area for both large-scale and artisanal gold mining, notably hosting the Diwalwal gold rush area? A) Southern Palawan B) Surigao del Norte C) Benguet Province D) Davao del Norte E) None of the above

D) Davao del Norte

Small-scale gold mines can be found in the following areas except: a. Acupan Contract Mining (Benguet Corp) – Itogon, Benguet b. Diwalwal (NRMDC) – Monkayo, Davao del Norte c. Canatuan (TVI) – Zamboanga del Norte d. Masinloc (Benguet Corp.) – Masinloc, Zambales

d. Masinloc (Benguet Corp.) – Masinloc, Zambales The Masinloc area in Zambales is known for one of the largest chromite mines in the world (operated by Benguet Corporation in the past), not a small-scale (or large-scale) gold mine. The other locations are famous for gold (and silver) mining, which includes significant small-scale/artisanal operations.

Which process describes a magma incorporating and dissolving surrounding country rock, sometimes adding key volatile components (like sulfur) that trigger the formation of sulfide-rich ore liquids? A) Gravitational settling B) Magmatic assimilation C) Immiscible separations D) Magma mixing E) None of the above

B) Magmatic assimilation

Which process involves the physical blending of two compositionally different magmas, a process that can sometimes lead to sulfide saturation by rapidly changing the temperature and composition of the resultant melt? A) Gravitational settling B) Magmatic assimilation C) Immiscible separations D) Magma mixing E) None of the above

D) Magma mixing

The world-class nickel, copper, and platinum group element (PGE) sulfide ores of the Sudbury Igneous Complex in Ontario, Canada, are prime examples of magmatic ore deposits formed by which process? A) Gravitational settling B) Magmatic assimilation C) Immiscible separations D) Magma mixing E) None of the above

C) Immiscible separations (Also known as liquid immiscibility)

Which country is home to the classic diamond-bearing kimberlite deposits, including the Kimberley Big Hole and the Premier Mine, which defined the global diamond industry? A) United States of America B) Central and eastern Canada C) South Africa D) B and C

C) South Africa

Which country contains the only publicly accessible diamond mine (Crater of Diamonds State Park) where visitors can search for diamonds in an in-situ lamproite pipe? A) United States of America B) Central and eastern Canada C) South Africa D) B and C

A) United States of America

Which general classification of elements is characterized by their high solubility and tendency to be readily transported by groundwater, sometimes leading to false or dispersed geochemical anomalies? A) Pathfinder elements B) Ores C) Particulates D) Mobile elements

D) Mobile elements

In geochemical exploration, which term refers to trace elements that are genetically or chemically related to a target metal deposit and can be measured in surficial samples to indicate the proximity of the hidden ore body? A) Pathfinder elements B) Ores C) Particulates D) Mobile elements E) None of the above

A) Pathfinder elements

Which chemical ion, typically sourced from the mineral fluorite (CaF2), is often added to drinking water and dental products to help prevent tooth decay? A) Asbestos B) Leather C) Cement D) Fluoride

D) Fluoride

Which essential building material is typically made by heating a mixture of limestone and clay, leading to the formation of clinker that is then ground with gypsum? A) Asbestos B) Leather C) Cement D) Fluoride

C) Cement

The mineral group Serpentine, particularly the fibrous polymorph chrysotile, is historically and economically important as a major source of which material, valued for its heat-resistant properties? A) Asbestos B) Leather C) Cement D) Fluoride

A) Asbestos

Shrinkage stoping is an underground hard-rock mining method where the broken ore remains in the stope to serve as a working platform and to provide temporary support. This method is defined by the fact that: A) The ore is drilled, blasted and mucked out almost immediately. B) High degree of safety is observed. C) None of these D) The blasted muck is drawn at regular intervals allowing just adequate space for miners to comfortably stand on during active mining.

D) The blasted muck is drawn at regular intervals allowing just adequate space for miners to comfortably stand on during active mining.

Which of the following computerized ore modeling techniques is a geostatistical method that incorporates the spatial correlation (variogram) of samples to provide the Best Linear Unbiased Estimate (BLUE) for grade in large, disseminated deposits like porphyry copper? A) Polygon B) Inverse Distance Squared (IDS) C) None of these D) Kriging E) Graphical

D) Kriging

Which deterministic estimation method assigns grade values to blocks by taking a weighted average of surrounding samples, where the weight is proportional to the inverse square of the distance to the sample point? A) Polygon B) Inverse Distance Squared (IDS) C) None of these D) Kriging E) Graphical

B) Inverse Distance Squared (IDS)

Which classic, non-statistical ore modeling technique involves drawing boundaries that enclose all drill hole intercepts, with the entire area assigned the average grade of the central composite? A) Polygon B) Inverse Distance Squared (IDS) C) None of these D) Kriging E) Graphical

A) Polygon

Which technique involves the manual delineation of mineralized zones on cross-sections or level plans, relying on visual interpretation and geometric projection rather than mathematical estimation algorithms? A) Polygon B) Inverse Distance Squared (IDS) C) None of these D) Kriging E) Graphical

E) Graphical

In diamond drilling, which of the following has the largest diameter? A. PQ C. HQ B. NQ D. BQ

A. PQ AQ 48mm BQ 65 mm NQ 75 mm HQ 100 mm PQ 125 mm

In the context of the ultimate pit design process, which of the following is the essential initial data structure that must be prepared and fed into the Lerch-Grossmann Algorithm for pit optimization? A) Peso value matrix B) Orebody cross section matrix C) Pit limit optimization D) Pit limit search

A) Peso value matrix (or Block Value Matrix) or Profit Matrix

Before any optimization is run, which data structure is used to visually display and confirm the spatial distribution of grade and geology across the deposit in two dimensions? A) Peso value matrix B) Orebody cross section matrix C) Pit limit optimization D) Pit limit search

B) Orebody cross section matrix

Which of the following are the main specification component of chemical grade chromite? A. Cr203, P, S and moisture B. Cr203+Al203, and P C. Cr203, MgO and Si02 D. Cr203, FeO and Cr: Fe ratio

D. E. Cr203, FeO and Cr: Fe ratio

To explore a horizontally lying deposit, how will you best position your holes? A. Inclined at a steep angle B. Vertical C. None of these D. Inclined at a shallow angle

B. Vertical

Once a target profit shell is defined using the Lerch-Grossmann algorithm, which subsequent iterative process is used to define a series of nested pits at varying cut-off values or metal prices to inform production scheduling and sequencing? A) Peso value matrix B) Orebody cross section matrix C) Pit limit optimization D) Pit limit search

D) Pit limit search (The process is often known as the push-back or phased design search.)

Which type of quantitative analysis method determines the concentration of an analyte by measuring the volume or pressure of a gas evolved or absorbed during a chemical reaction? a. Volumetric b. Gasometric c. Gravimetric d. Wet method

b. Gasometric

Which general term describes the entire mathematical process of determining the largest ultimate open pit that can be mined at a defined minimum profit, for which the Lerch-Grossmann algorithm is the most common solution method? A) Peso value matrix B) Orebody cross section matrix C) Pit limit optimization D) Pit limit search

C) Pit limit optimization

Which of the following best describes the main grade of chromite product specified in the permit for the former Heritage Resources and Mining Corporation's (HRMC) operation in Homonhon Island, Guiuan, Eastern Samar, which is typical of lateritic Philippine chromite deposits? A. Refractory chromite B. Metallurgical chromite C. Chemical grade chromite D. None of these

C. Chemical grade chromite

Prior to the official public disclosure of an Ore Reserve for a mineral deposit, the Competent Person (CP) must establish, through a comprehensive Feasibility Study, which of the following criteria? A. Feasible minability of the deposit B. Social acceptability of the project C. All of these D. Environment feasibility of the operation E. Metallurgical viability of the material under consideration

C. All of these

In the fire assay process, which chemical is used in the procedure known as parting to selectively dissolve silver (Ag) from the dore bead, leaving the pure gold (Au) residue for final weighing? a. Sodium cyanide b. Nitric acid c. Silica d. Ferrosilicon

b. Nitric acid

Which type of quantitative analysis method involves determining the concentration of an analyte by accurately measuring the volume of a reagent solution of known concentration (a titrant) required to react completely with the analyte? a. Volumetric b. Gasometric c. Gravimetric d. Wet method

a. Volumetric

Fire assaying, particularly for gold and silver, is classified as a quantitative analysis method primarily because the final pure metal product (the dore bead) is isolated and subsequently weighed to determine the concentration. Based on this final step, fire assaying is considered a: a. Volumetric b. Gasometric c. Gravimetric d. Wet method

c. Gravimetric

Which general classification of chemical analysis is applied to almost all common laboratory techniques where the sample is dissolved in an aqueous or solvent solution for preparation or analysis, excluding techniques that rely solely on heat (like fire assay)? a. Volumetric b. Gasometric c. Gravimetric d. Wet method

d. Wet method (Also known as wet chemistry or wet analytical methods.)

Which material is sometimes used as a reducing agent in certain smelting or flux formulations to help reduce metal oxides, but is NOT the reagent used to chemically separate silver from gold in the parting step? a. Sodium cyanide b. Nitric acid c. Silica d. Ferrosilicon

d. Ferrosilicon

Which highly toxic chemical reagent is the primary lixiviant used to selectively dissolve gold and silver from crushed ore in the industrial process known as cyanidation? a. Sodium cyanide b. Nitric acid c. Silica d. Ferrosilicon

a. Sodium cyanide

Which substance is commonly added to the fire assay flux mixture to act as a fluxing agent that helps form a fluid, disposable slag by combining with basic oxides like iron oxide? a. Sodium cyanide b. Nitric acid c. Silica d. Ferrosilicon

c. Silica

Used in commercial recovery of Au and Ag from their ore. a. Sodium chloride b. Sodium cyanide c. aqua regia d. HCl

a. Sodium chloride

Which gravity concentration technique, relying on the differential settling velocity of particles in a pulsating water current, is the most common method for concentrating medium-to-coarse-grained, high-specific-gravity chromite ores? a. Classifying b. Elutriation c. Jigging d. Sluicing

c. Jigging

Which specific type of classification technique uses an upward current of water or air to separate very fine particles based on their terminal settling velocity, typically used for ultra-fine materials like industrial clays? a. Classifying b. Elutriation c. Jigging d. Sluicing

b. Elutriation

Which gravity concentration method involves washing ore material over a trough or channel (a sluice box) equipped with riffles to trap the heavy mineral concentrates, commonly used in small-scale or placer gold mining? a. Classifying b. Elutriation c. Jigging d. Sluicing

d. Sluicing

The process of separating the ore minerals from the gangue minerals. a. Ore dressing b. Extractive metallurgy c. Milling d. Leaching

a. Ore dressing

Which compound is an active, readily fusible, acid flux with the chemical formula Na2B4O7⋅10H2O that is commonly used in fire assaying to help dissolve metallic oxides and form a fluid slag? a. Litharge b. Borax c. Argols d. Cryolite

b. Borax

Which fluxing agent, with the chemical formula PbO, serves as both an oxidizing agent and the primary lead collector of precious metals in the standard fire assay fusion process? a. Litharge b. Borax c. Argols d. Cryolite

a. Litharge (PbO)

Which organic compound, derived from the crust that forms on wine casks and consisting mainly of potassium bitartrate, is used in fire assay as a powerful reducing agent to aid in the formation of the lead button? a. Litharge b. Borax c. Argols d. Cryolite

c. Argols

Which fluoride mineral, with the chemical formula Na3AlF6 is sometimes used as a flux in certain pyrometallurgical operations, such as the Hall-Héroult process for aluminum production, but is not a standard flux in gold fire assaying? a. Litharge b. Borax c. Argols d. Cryolite

d. Cryolite

An intermediate product in copper smelting contains precious metals like gold (Au) and silver (Ag), and has a copper content typically ranging from 35% to 65%. What is this product? a. Matte b. Slag c. Blister Cu d. Ingot

a. Matte

This product is an intermediate in copper refining that is approximately 98% pure copper. It is named for the bubbles of sulfur dioxide gas that escape upon cooling, leaving a characteristic blistered appearance. What is this product? a. Matte b. Slag c. Blister Cu d. Ingot

c. Blister Cu

During the smelting of metal ore, what is the term for the glassy, waste by-product that floats on the surface of the molten metal and is removed? a. Matte b. Slag c. Blister Cu d. Ingot

b. Slag

Which of the following is a mass of metal, such as copper or gold, cast into a a specific shape (often a block or bar) for storage or transportation before being further processed? a. Matte b. Slag c. Blister Cu d. Ingot

d. Ingot

Which metallurgical process involves heating a metal ore to a high temperature, but below its melting point, in the presence of air or oxygen to convert it into a metallic oxide? a. Smelting b. Converting c. Roasting d. Tempering

c. Roasting

What is the process of heating an ore beyond its melting point to chemically reduce it, separating the metal from impurities and forming a slag? a. Smelting b. Converting c. Roasting d. Tempering

a. Smelting

This metallurgical process is a type of smelting that involves blowing air or oxygen through a molten metal sulfide, also known as matte, to produce crude metal and slag. What is it called? a. Smelting b. Converting c. Roasting d. Tempering

b. Converting

Which heat treatment process is performed on an already hardened metal, such as steel, by reheating it to a temperature below its critical point to reduce brittleness and increase toughness? a. Smelting b. Converting c. Roasting d. Tempering

d. Tempering

Which process electrochemically dissolves copper from impure anodes and selectively plates the pure copper onto cathodes? a. Smelting b. Converting c. Roasting d. Electrorefining

d. Electrorefining

Which component of copper electrorefining is a solution containing 40-50 kg/m³ of copper, 180-200 kg/m³ of sulfuric acid (H₂SO₄), and various brightening and smoothing agents? a. Blister Cu b. Anode impurities c. Matte d. Electrolyte

d. Electrolyte

During the electrorefining of copper, what is the term for the insoluble residue containing precious metals and other valuable elements that collects at the bottom of the electrolytic cell? a. Blister Cu b. Anode impurities c. Matte d. Electrolyte

b. Anode impurities

Which intermediate product of copper smelting is a molten mixture of copper and iron sulfides, with a copper concentration typically ranging from 35% to 65%? a. Blister Cu b. Anode impurities c. Matte d. Electrolyte

c. Matte

States that all minerals belong to the state. a. Regalian doctrine c. Hernandez doctrine b. Rizalian doctrine d. Proletarian doctrine

a. Regalian doctrine

Under Philippine law, all submerged lands within the Exclusive Economic Zone are declared as what kind of reservation? a. Marine Reservations b. Off-shore Reservations c. Mineral Reservations d. Aquatic Reservations

c. Mineral Reservations

Which type of reserve is an area in the sea established for the protection and preservation of marine biodiversity and resources, such as the one declared in the Philippine Rise? a. Marine Reservations b. Off-shore Reservations c. Mineral Reservations d. Aquatic Reservations

a. Marine Reservations

Which term refers to any designated area of land located away from the coast, in a sea or ocean, typically for the purpose of resource exploration or military use? a. Marine Reservations b. Off-shore Reservations c. Mineral Reservations d. Aquatic Reservations

b. Off-shore Reservations

Which type of reservation is an area of water, including lakes, rivers, or other aquatic habitats, set aside for the conservation of aquatic life and resources? a. Marine Reservations b. Off-shore Reservations c. Mineral Reservations d. Aquatic Reservations

d. Aquatic Reservations

While not the location for initial filing, which office ultimately approves the Mineral Agreement after the MGB Director's endorsement? a. The region where the areas are located c. The DENR central office b. MGB central office d. A district office of the MGB

c. The DENR central office

Which primary government agency in the Philippines is responsible for the conservation, management, development, and proper use of the country's mineral resources? a. Mines and Geosciences Bureau b. Department of Mineral Resources c. DENR d. Bureau of Mines

a. Mines and Geosciences Bureau

What is the larger government department under which the Mines and Geosciences Bureau (MGB) operates, handling the broader scope of environmental and natural resources? a. Mines and Geosciences Bureau b. Department of Mineral Resources c. DENR d. Bureau of Mines

c. DENR

Where must all proposed Mineral Agreements, except those within Mineral Reservations, be filed? a. The region where the areas are located b. The MGB central office c. The DENR central office d. A district office of the MGB

a. The region where the areas are located

For Mineral Agreements within Mineral Reservations, where should the proposal be filed? a. The region where the areas are located b. The MGB central office c. The DENR central office d. A district office of the MGB

b. The MGB central office

In the Philippines, a proposed Mineral Agreement is approved by which government official? a. MGB Director b. MGB Regional Director c. DENR Secretary d. President

c. DENR Secretary

Which official is responsible for recommending the approval of a Mineral Agreement to the DENR Secretary and monitoring the contractor's compliance with its terms? a. MGB Director b. MGB Regional Director c. DENR Secretary d. President

a. MGB Director

Which high-level official is required to approve Financial or Technical Assistance Agreements (FTAAs) for large-scale mining projects in the Philippines? a. MGB Director b. MGB Regional Director c. DENR Secretary d. President

d. President

Any qualified person may apply for a Quarry Permit to the a. DENR Secretary b. Provincial Governor c. MGB Director d. Provincial/City Mining Regulatory Board

d. Provincial/City Mining Regulatory Board

A Quarry permit is granted by the a. MGB Director b. Provincial Governor c. DENR Secretary d. Provincial/City Mining Regulatory Board

b. Provincial Governor

Which statistical data structure is characterized by observations or measurements that are collected, observed, or recorded at successive, equally spaced points or regular intervals of time? a. Interval cycle b. Time-data Record c. Time series d. Business cycle

c. Time series

Which general term refers to a repeating pattern or period of time between successive events or measurements, often used to describe cyclical behavior but is not a formal statistical data set term? a. Interval cycle b. Time-data Record c. Time series d. Business cycle

a. Interval cycle

Which phrase is a general, non-technical description of data taken over time, rather than a specific, formal term used in statistics and econometrics for such sequential data? a. Interval cycle b. Time-data Record c. Time series d. Business cycle

b. Time-data Record

Which specific term refers to the recurring pattern of economic activity that a nation's economy experiences over a period of years, characterized by four distinct phases: expansion, peak, contraction, and trough? a. Interval cycle b. Time-data Record c. Time series d. Business cycle

d. Business cycle

Which economic term is defined as the financial difference calculated by subtracting the total cost of producing a commodity (mining, processing, overhead) from its final market selling price? a. Profit spread b. Commodity index c. Sell index d. Commodity price index

a. Profit spread

Which term refers to a benchmark or composite measurement that tracks the average price movement of a group of physical goods, such as energy, metals, and agricultural products? a. Profit spread b. Commodity index c. Sell index d. Commodity price index

b. Commodity index

Which choice is a non-standard term that does not represent a recognized economic or financial metric for market analysis or profitability calculation? a. Profit spread b. Commodity index c. Sell index d. Commodity price index

c. Sell index

In economics, which term refers to the single market price at which the quantity of a commodity demanded by buyers is precisely equal to the quantity of that commodity supplied by producers? a. Selling price b. Marginal price c. Equilibrium price d. Floor price

c. Equilibrium price

Which economic indicator is used to track the relative change in the market price of a specific basket of raw materials over time, usually compared to a base period? a. Profit spread b. Commodity index c. Sell index d. Commodity price index

d. Commodity price index

Which term refers to the cost incurred to produce one additional unit of a good or service, which, in a perfectly competitive market, is often set equal to the selling price to maximize profit? a. Selling price b. Marginal price c. Equilibrium price d. Floor price

b. Marginal price

Which general term simply refers to the price at which a seller offers a product or service for sale to a customer, regardless of whether that price balances the market? a. Selling price b. Marginal price c. Equilibrium price d. Floor price

a. Selling price

Which government-imposed regulatory measure sets the minimum price at which a good or service can be legally traded, usually resulting in a market surplus? a. Selling price b. Marginal price c. Equilibrium price d. Floor price

d. Floor price

Which type of interest is calculated exclusively on the original principal amount borrowed or invested, where the total interest earned is directly proportional to the principal, the rate, and the number of periods, as described by the formula I=Prt? a. Simple interest b. Compound interest c. Nominal interest rate d. Effective interest rate

a. Simple interest

Which type of interest calculation involves adding the previously earned interest back to the principal at the end of each period, resulting in interest being earned on interest as well as on the original principal? a. Simple interest b. Compound interest c. Nominal interest rate d. Effective interest rate

b. Compound interest

Which term refers to the stated or advertised annual interest rate that does not take into account the effect of compounding, and is typically the rate used in the formula for simple interest? a. Simple interest b. Compound interest c. Nominal interest rate d. Effective interest rate

c. Nominal interest rate

Which term refers to the true annual interest rate that is actually earned or paid on an investment or loan, taking into account the impact of the compounding frequency? a. Simple interest b. Compound interest c. Nominal interest rate d. Effective interest rate

d. Effective interest rate (or Annual Percentage Yield (APY)

The fundamental economic problem that necessitates making choices is scarcity. Given this concept, which of the following best describes the Opportunity Cost of a decision? A) The total monetary price paid for the chosen item. B) The sum of all alternatives that were rejected. C) The value of the next best alternative that was foregone. D) The marginal benefit gained from the choice.

C) The value of the next best alternative that was foregone.

In which type of market structure is there a single seller offering a unique product with no close substitutes, giving that firm complete control over the market price? A) Oligopoly B) Perfect Competition C) Monopolistic Competition D) Monopoly

D) Monopoly

The Aggregate Demand curve shows the total quantity of goods and services demanded at different price levels. If a government implements an expansionary fiscal policy by increasing its spending on infrastructure, how will this likely affect the Aggregate Demand (AD) curve? A) The AD curve will shift to the left. B) There will be a movement upward along the AD curve. C) The AD curve will shift to the right. D) There will be a movement downward along the AD curve.

C) The AD curve will shift to the right.

ASSESSMENT Flashcards

(260 cards)