Core 333 Flashcards by Gregorio Mahinay III

An Iron Ore of 60% Fe contains only one Iron Mineral Hematite. What is the percent gangue in Iron Ore?
a. 26.67%
b. 18.65%
c. 60%
d. 14.21%

d. 14.21%

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The presence of large, well-formed crystals in an igneous rocks indicate:
a. Rapid cooling
b. Slow cooling
c. Volcanic origin
d. High silica content

b. Slow cooling

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A fault where the hanging wall moves down relative to the footwall is called as:
a. Reverse fault
b. Strike-slip fault
c. Normal fault
d. Oblique fault

c. Normal fault

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A fine-grained igneous rock with abundant vesicles likely erupted:
a. At depth under high pressure
b. Slowly, allowing crystal growth
c. With high water content
d. From a low-silica magma

d. From a low-silica magma

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An electrolytic extraction process in which cathodic reduction is used to recover the sought metal from the electrolyte which is derived from leaching process.
a. Electrowinning
b. Electrorefining
c. Elutriation
d. Elution

a. Electrowinning

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This mineral is known for its vibrant green color and is a significant source of copper:
a. Azurite
b. Malachite
c. Bornite
d. Chalcocite

b. Malachite

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Which era of geological time is represented by the Carboniferous, Permian, and Triassic period?
a. Precambrian
b. Paleozoic
c. Mesozoic
d. Cenozoic

b. Paleozoic (Carboniferous & Permian)
c. Mesozoic (Triassic)

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A marine waterbody classification such as tourist zones for ecotourism and recreational activities.
a. Class B
b. Class C
c. Class SB
d. Class SC

c. Class SB

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Which of these minerals is piezoelectric?
a. Quartz
b. Hematite
c. Halite
d. Feldspar

a. Quartz

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A porphyritic igneous texture indicates:
a. Two distinct cooling stages
b. Rapid, uniform cooling
c. High viscosity magma
d. Eruption from a deep magma chamber

a. Two distinct cooling stages

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What is the hydrous form of anhydrite?
a. Gypsum
b. Barite
c. Geothite
d. Alabaster

d. Alabaster

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An ophiolite sequence represents a fragment of:
a. Ancient ocean floor
b. Subducted continental crust
c. A fossilized magma chamber
d. Volcanic island arc material

a. Ancient ocean floor

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The lead button is separated from the slag and then treated by this process to separate the gold and silver from the lead.
a. Cupellation
b. Scorification
c. Inquartation
d. Annealing

a. Cupellation

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A low-angle reverse fault with extensive displacement is referred to as a:
a. Horst
b. Graben
c. Thrust fault
d. Transform fault

c. Thrust fault

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The principle of cross-cutting relationships stated that a:
a. Younger rock is cut by an older fracture
b. Fracture is younger than the rock it cuts through
c. Older rock is always cut by a younger fracture
d. The layer of rock above a sequence is youngest

b. Fracture is younger than the rock it cuts through

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Recent developments in biotechnology are currently being exploited in hydrometallurgy operations, particularly in the bacterial oxidation of sulphide gold ores and concentrates. Which of the following bacterium is mainly used to enhance the rate of oxidation, by breaking down the sulphide lattice and thus liberating the occluded gold for subsequent removal by cyanide leaching?
a. Candidatus Manganitrophus noduliformans
b. Cupriavidus metallidurans
c. Acidithiobacillus ferrooxidans
d. Ramlicbacter lithotrophicus

c. Acidithiobacillus ferrooxidans

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Which mineral is a key component in the manufacture of plaster and drywall?
a. Calcite
b. Talc
c. Gypsum
d. Apatite

c. Gypsum

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A method of leaching where leaching and adsorption occurs simultaneously. The slurry is introduced into the 1st tank while the AC is introduced in the last tank.
a. Carbon-in-leach
b. Carbon-in-pulp
c. Carbon-in-solution
d. Hybrid CIP-CIL

a. Carbon-in-leach

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This is a shallow, porous dish made of bone-ash, Portland cement, magnesia or other refractory and non-corrosive material.
a. Crucible
b. Scorifier
c. Porcelain capsules
d. Cupel

d. Cupel

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A mineral that glows under ultraviolet light is said to exhibit:
a. Fluorescence
b. Phosphorescence
c. Chatoyancy
d. Iridescence

a. Fluorescence

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The side of the fault with exposed rock surface above the fault plane is the:
a. Dip wall
b. Strike wall
c. Footwall
d. Hanging wall

d. Hanging wall

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The Montreal Protocol banned the production and consumption of CFCs and HCFCs, which to be replaced by?
a. Carbon tetrachloride
b. Hydrofluorocarbons
c. Methyl chloroform
d. Hydrobromofluorocarbons

b. Hydrofluorocarbons

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Compressional forces causing folding and faulting occurs mostly often at:
a. Divergent plate boundaries
b. Convergent plate boundaries
c. Transform plate boundaries
d. Constructive plate boundaries

b. Convergent plate boundaries

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A type of feeder used in wet grinding mills where the entire mill feed is fed to the drum and the scoop picks it up and fed to the mill.
a. Drum feeder
b. Spout feeder
c. Scoop feeder
d. Drum-scoop feeder

d. Drum-scoop feeder

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Sausage-like structures formed when a competent layer is stretched within a less competent matrix are called: a. Boundinage b. Cross-bedding c. Anticline d. Porphyroblasts

a. Boundinage

A mineral with a splintery or uneven fracture pattern is described as: a. Conchoidal b. Hackly c. Basal d. Octahedral

b. Hackly

Toward the cupellation process the temperature must be raised again, because the alloy becomes more difficulty fusible as the proportions of silver in it decreases. To drive off the last of the lead, the temperature should be raised to about? a. 500 degrees Celsius b. 900 degrees Celsius c. 1,200 degrees Celsius d. 1,500 degrees Celsius

c. 1,200 degrees Celsius

Fossils of soft-bodied organisms are most commonly preserved in which type of rock? a. Granite b. Limestone c. Shale d. Sandstone

c. Shale

Kimberlites are famous for hosting: a. Gold deposits b. Chromite deposits c. Diamonds d. Sapphire

c. Diamonds

A motion of charge in tumbling mill occurs when the medium is carried around in an essentially fixed position against the shell. This leads to comminution by impact and a coarser end product with reduced liner wear. a. Centrifuging b. Cataracting c. Cascading d. Abrasion

b. Cataracting

A sharp, angular bed in a foliated rock. a. Kink band b. Dome c. Unconformity d. Metamorphic aureole

a. Kink band

Which of the following is the formula of Borax? a. Na2B407 b. Na2B407 10H2O c. KHC4H4O6 d. NaHCO3

a. Na2B407 (sodium tetraborate or anhydrous borax) b. Na2B407 10H2O (borax) c. KHC4H4O6 (cream of tartar) d. NaHCO3 (baking soda)

Which of the following components of a Tailings Storage Facility that provides a controlled pathway for excess water to safely exit the facility, preventing overtopping of the dam and ensuring the stability of the entire structure? a. Spillway b. Penstock c. Outfall d. Underdrainage

a. Spillway

Turbidites are sedimentary deposits formed by: a. Wind erosion b. Glacial erosion c. Underwater currents and avalanching d. Fluvial deposition

c. Underwater currents and avalanching

The DAO 2016-08 limits threshold value of BOD for Class AA waterbodies to? a. No discharge allowed b. 1 mg/L c. 3 mg/L d. 5 mg/L

d. 5 mg/L

The cat's eye effect, where a thin, moving line of light is reflected off the surface, is known as? a. Iridescence b. Play-of-color c. Chatoyancy d. Fluorescence

c. Chatoyancy

An uplifted block bounded by two normal faults is called: a. Horst b. Thrust c. Anticline d. Graben

a. Horst

Metasomatism refers to changes in rock composition due to: a. Foliation development b. Fluid interaction c. Increase in pressure d. Intense heating

b. Fluid interaction

In cupellation, as the last of the lead goes off, these drops disappear, the fused litharge covering becomes very thin and, being of variable thickness, gives an effect of interference of light, so that the bed appears to revolve and presents a succession of rainbow colors, this phenomenon is termed as? a. Asterism b. Play of Colors c. Pleochroism d. Fluoresnce

b. Play of Colors (Iridescence)

When a mineral produces sparks upon being struck, it's exhibiting: a. Fluorescence b. Phosphorescence c. Triboluminescence d. Iridescence

c. Triboluminescence

Which type of volcano is composed of fluid basaltic lava flows? a. Composite b. Shield c. Fissure d. Cinder cone

b. Shield

The process where the loaded carbon is heated by a strong solution of hot caustic and cyanide to reverse the adsorption process and strip the carbon of god. a. Stripping b. Precipitation c. Adsorption d. Elution

d. Elution

Which rock is the volcanic equivalent of gabbro? a. Rhyolite b. Andesite c. Komatite d. Basalt

d. Basalt

According to the principle of fossil succession, the same fossil species should be found in: a. Rocks any age b. Sedimentary rock layers of the same age c. Only the oldest rock layers d. Only the youngest rock layers

b. Sedimentary rock layers of the same age

The process of separating the particles of different specific gravities, size, and shape by introducing them on a perforated surface (or screen) through which the water is made to flow by pulsion and suction strokes alternatively. a. Gravity concentration b. Flowing film concentration c. Jigging d. Heavy Liquid Separation

c. Jigging

A mineral that feels unusually slipper or soapy is likely: a. Serpentine b. Beryl c. Talc d. Gypsum

c. Talc

These are inorganic chemicals used as reagents. They react chemically with mineral particle surfaces to produce insoluble protective coatings of a wettable nature making them non-floatable even in the presence of proper collector. Thus formed protective coatings prevent the formation of collector film. a. Frother b. Activators c. Dispersants d. Depressants

d. Depressants

A bed has an apparent thickness of 85 meters and a dip of 35 degrees. Calculate the true thickness of the bed. a. 58 meters b. 123 meters c. 49 meters d. 97 meters

c. 49 meters

What is the melting point of litharge? a. 556 degrees Celsius b. 775 degrees Celsius c. 884 degrees Celsius d. 1250 degrees Celsius

c. 884 degrees Celsius 888*

A xenolith found within a granite likely represents: a. Piece of an older, intruded rock b. Remnant of magma mixing c. Crystallized bubble from the magma d. Hydrothermal alteration zone

a. Piece of an older, intruded rock

Two rock outcrops have the same strike but dips facing opposite directions. This is likely represents: a. A series of parallel faults b. An intrusive body c. Unrelated planar features d. The hinge zone of a fold

d. The hinge zone of a fold

Which of the following is not a reducing agent? a. Cream of tartar b. Potassium cyanide c. Potassium nitrate d. Flour

c. Potassium nitrate

The Kyoto Protocol aims to reduce greenhouse gas emissions based on the scientific consensus that global warming is occurring. Which of the following GHGs is the primary concern to reduce? a. Chlorofluorocarbons b. Carbon dioxide c. Nitrous oxide d. Carbon monoxide

b. Carbon dioxide

The principle of uniformitarianism was first introduced by: a. Alfred Wegener b. James Hutton c. Charles Darwin d. Louis Agassiz

b. James Hutton

The strike of a bed is: a. The angle between the feature and the horizontal plane b. The direction of the intersection of the feature with horizontal plane c. The angle of inclination from the horizontal, measured perpendicular to strike d. The horizontal component of the dip direction

b. The direction of the intersection of the feature with horizontal plane

In the loss of precious metals during cupellation, what is the most common impurity? a. Copper b. Selenium c. Bismuth d. Manganese

a. Copper

The formation of pillow basalts indicates: a. Eruption under water b. High silica water c. Explosive eruption style d. Ancient volcanic deposits

a. Eruption under water

If this metal is present in the lead button during cupellation, in small quantities gives dark green scoria and greenish stains. Larger amounts cause the button to freeze. a. Nickel b. Zinc c. Tin d. Antimony

a. Nickel

A mineral sample displays a distinct "schiller" effect, which appears to shift subtly when the mineral is rotated. This is likely due to: a. Chatoyancy b. Iridescence c. Twinning b. Exsolution lamellae

b. Exsolution lamellae

Norman Bowen's pioneering work focused on understanding the formation of: a. Sedimentary rocks b. Igneous rocks c. Metamorphic rocks d. Fossils

b. Igneous rocks

One of these minerals is not a carbonate: a. Calcite b. Dolomite c. Siderite d. Gypsum

d. Gypsum

In cupellation, when the bead suddenly becomes very bright at the moment of solidification, owing to the release of the latent heat of fusion, which raises the temperature of the bead very much for a short time. This phenomenon is termed as: a. Blick b. Frozen c. Splitting d. Sprouting

a. Blick (Brightening)

What do the letters QAPF in the classification of igneous rocks stand for? a. Quartz, Alkali feldspar, Plagioclase, Feldspathoids b. Quartz, Amphibole, Pyroxene, Feldspar c. Quartz, Alkali feldspar, Potassium, Feldspathoids d. Quartz, Accessory, Plagioclase, Feldspar

a. Quartz, Alkali feldspar, Plagioclase, Feldspathoids

The supercontinent Pangea began to break apart during the: a. Cambrian Period b. Permian Period c. Triassic Period d. Jurassic Period

c. Triassic Period

In the color scale of temperature used in cupellation, at 900 degrees Celsius, what color can be seen? a. Light red b. Orange c. Yellow d. Light yellow

a. Light red (Cherry red)

In gold assaying, what acid is used in parting? a. Hydrochloric acid b. Phosphoric acid c. Carbonic acid d. Nitric acid

d. Nitric acid

A roadcut exposes a fault with a heave of 30 meters. The fault plane dips at 60 degrees. What's the approximate throw of the fault? a. 52 meters b. 15 meters c. 26 meters d. 35 meters

a. 52 meters

A fibrous variety of gypsum with a silky luster is known as: a. Anhydrite b. Selenite c. Satin spar d. Alabaster

c. Satin spar

A high-pressure metamorphic rock formed from the metamorphism of impure limestone is often rich in garnet and kyanite. This rock is called: a. Eclogite b. Amphibole c. Marble d. Hornfels

a. Eclogite

The DAO 2016-08 limits the threshold value of TSS for Class A waterbodies to? a. 10 mg/L b. 25 mg/L c. 50 mg/L d. 65 mg/L

c. 50 mg/L

Powerful oxidizing agent which oxidizes sulfides, arsenides, and antimonides. It is used to control the size of the Pb button when reducing effect is very high. a. Flour b. Potassium nitrate c. Argols d. Silica

b. Potassium nitrate

During which geological period did the first land plants appear? a. Cambrian b. Ordovician c. Silurian d. Devonian

b. Ordovician

Which of the following regulations aims to provide additional environmental policies that will ensure sustainable environmental conditions at every stage of the mining operation and minimize the disturbed areas of operating surface metallic mines? a. DENR AO No. 2022-04 b. DENR AO No. 2018-19 c. DENR AO No. 2021-22 d. DENR AO No. 2021-37

b. DENR AO No. 2018-19

A normal fault has throw of 104 meters. The fault plane dips at 50 degrees. What is the heave of the fault? a. 61 meters b. 87 meters c. 131 meters d. 51 meters

b. 87 meters

A rock showing evidence of intense shearing and ductile deformation might be called: a. Mylonite b. Migmatite c. Pegmatite d. Skarn

a. Mylonite

The ratio of the weight of the feed (or heads) to the weight of the concentrates. It is a measure of the efficiency of the concentration process. a. Recovery b. Ratio of Concentration c. Metallurgical Efficiency d. Enrichment Ratio

b. Ratio of Concentration

Which metamorphic rock forms form limestone? a. Schist b. Gneiss c. Marble d. Quartzite

c. Marble

The jaw of this crusher is pivoted at the bottom, giving a variable feed area but fixed delivery area. a. Blake crusher b. Dodge crusher c. Universal crusher d. Cone crusher

b. Dodge crusher

A fold with a narrow hinge zone and limbs that dip at roughly equal angles in opposite directions: a. Box fold b. Isoclinal fold c. Chevron fold d. Monocline

c. Chevron fold

Which of the following is the gem variety of olivine? a. Amethyst b. Sapphire c. Emerald d. Peridot

d. Peridot a. Amethyst (purple variety of quartz) b. Sapphire (gem variety of the mineral corundum) c. Emerald (variety of the mineral beryl)

A rock compose of rounded pebbles and gravel cemented together. a. Conglomerate b. Shale c. Sandstone d. Breccia

a. Conglomerate

When an ore contains two or more valuable minerals, one valuable mineral is selected and floated first and second valuable mineral is floated from the tailings. This flotation is called? a. Direct flotation b. Reverse flotation c. Bulk flotation d. Differential flotation

d. Differential flotation

Diagenesis refers to: a. Process that change sediments into rock b. The original depositional environment c. Weathering and erosion of sedimentary rocks d. Mountain-building processes

a. Process that change sediments into rock

Which of the following minerals belong to the cubic system? a. Orthoclase b. Quartz c. Garnet d. Apatite

c. Garnet a. Orthoclase (monoclinic) b. Quartz (trigonal) d. Apatite (hexagonal)

When the bead contains too little silver to part, it is necessary to alloy it with more silver. This process is called? a. Scorification b. Parting c. Inquartation d. Annealing

c. Inquartation a. Scorification (lead and a flux) b. Parting (nitric acid) d. Annealing (heat treatment process)

Which of the following international policies which its goal is to hold the increase in the global average temperature to well below 2 deg C above pre-industrial levels and pursue efforts to limit 1.5 deg C above pre-industrial levels? a. Vienna Convention b. Kyoto Protocol c. Doha Amendment d. Paris Agreement

d. Paris Agreement a. Vienna Convention (1st, address problems on the Ozone) b. Kyoto Protocol (reducing greenhouse gas emissions) c. Doha Amendment (amendment to the Kyoto, 2013-2020) add: Montreal (after VC, Ozone layer, phase out of ODSs, CFCs)

A cross-section shows dipping rock layers forming a V shape. The dip direction changes across the center of the V. This is likely represents: a. Anticline b. Recumbent fold c. Thrust fault d. Syncline

d. Syncline

A reagent that is powerful basic flux. It combines with silica and alumina, producing fusible silicates and aluminates to form slag. a. Sodium carbonate b. Litharge c. Potassium carbonate d. Borax glass

a. Sodium carbonate (soda ash) b. Litharge (basic flux, collector for precious metals, Au & Ag) c. Potassium carbonate (similar to soda ash, but sa is more commonly used) d. Borax glass (highly effective flux, but it is acidic in nature)

The blue variety of corundum is known as: a. Emerald b. Ruby c. Sapphire d. Aquamarine

c. Sapphire a. Emerald (green gem variety of the mineral beryl) b. Ruby (gem variety of corundum, caused by chromium) d. Aquamarine (blue to greenish-blue variety of the mineral beryl)

Which of the following is an example of an unconformity that represents a significant period of erosion or non-deposition? a. Disconformity b. Angular unconformity c. Nonconformity d. Paraconformity

a. Disconformity b. Angular unconformity - This type of unconformity is easily recognizable because the older, underlying rock layers have been tilted, folded, or faulted and then eroded, with younger, flat-lying sedimentary layers deposited on top. c. Nonconformity - This occurs when a sedimentary rock is deposited on top of an older, eroded igneous or metamorphic rock. d. Paraconformity - This is a type of unconformity where the sedimentary layers above and below the boundary are parallel and there is no visible evidence of an erosional surface.

What is the fineness of a 21K Gold? a. 800 fineness b. 850 fineness c. 875 fineness d. 900 fineness

c. 875 fineness Fineness=(Karat/24)x1000

The process of heating the ore in the presence of excess air which involves the oxidation of metal sulfides to produce metal oxides and sulfur dioxide. a. Calcination b. Smelting c. Sintering d. Roasting

d. Roasting Calcination - absence or limited supply of air

A biochemical sedimentary rock composed primarily of microscopic siliceous fossil remains: a. Limestone b. Sandstone c. Diatomite d. Evaporite

c. Diatomite a. Limestone - Limestone is also a biochemical sedimentary rock, but it is composed primarily of calcium carbonate b. Sandstone - Sandstone is a clastic sedimentary rock. d. Evaporite - Evaporites are chemical sedimentary rocks.

In Fire Assay, silicates are defined in degree by: a. Ratio of oxygen of base to acid b. Ratio of oxygen of acid to base c. Ratio of silica of base to acid d. Ratio of silica of acid to base

b. Ratio of oxygen of acid to base

A geological map shows a circular pattern of strike and dip symbols, with dips pointing inwards towards the center. This likely indicates: a. A dome b. A basin c. A plunging anticline d. A regional fault

b. A basin - Dome: the opposite of a basin. - Plunging anticline: appears as a V-shaped or U-shaped pattern on a map, not a circular one.

Core 333 Flashcards

(95 cards)