D1 Flashcards by Gregorio Mahinay III

According to Mohr-Coulomb, the unconfined compressive strength (qu) is related to cohesion (Si) and friction angle (φ) by:
a. qu = 2Si
b. qu = 2Sitan (45 + φ/2)
c. qu = Si(cosφ)
d. qu = σ3 + Sitanφ

b qu = 2Si tan(45 + φ/2)

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According to the cardinal rule of exploitation, the chosen method should yield the overall ____________.
a. Highest production
b. Shortest time
c. Lowest cost
d. Least manpower

c Lowest cost

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According to the cardinal rule of exploitation, the final goal is to return the:
a. Least dilution
b. Greatest volume
c. Maximum profit
d. Minimum waste

c Maximum profit

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A core run of 1.5 m produced intact pieces of lengths: 0.12 m, 0.09 m, 0.20 m, 0.45 m, 0.25 m, 0.15 m, and 0.24 m. What is RQD?
a. 43%
b. 94%
c. 73%
d. 80%

c 94%

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A device used for detonating an explosive like ordinary, electric, non-electric blasting caps, exploders percussion caps, primer, and electric detonators.
a. Detonator
b. Safety fuse
c. Explosives
d. Primed Cartridge

a Detonator

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All but which is a common technique used in mineral prospecting?
a. Seismic reflection
b. Magnetic survey
c. Ground-penetrating radar
d. Carbon dating

d Carbon dating

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Any building or structure other than explosive manufacturing building used for the storage of explosives and blasting accessories.
a. Laboratory
b. Safety and Health Office
c. Magazine
d. Warehouse

c Magazine

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A saturated sand at depth 5 m has γsat = 20 kN/m³. The water table is at the ground surface. What is the effective vertical stress at that depth?
a. 51 kPa
b. 76 kPa
c. 101 kPa
d. 49 kPa

a 51 kPa

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A tunnel designed using NATM relies heavily on:
a. Pre-determined rigid steel arches
b. Continuous monitoring of ground response during excavation
c. Assuming isotropic, homogeneous rock mass properties
d. Eliminating the use of shotcrete

b Continuous monitoring of ground response during excavation

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A type of accident that does not result in death or permanent total or permanent partial disability but which results in disability from work for a day or more.
a. Non-lost time accident
b. Lost-time accident (Non-fatal)
c. Lost-time accident (Fatal)
d. Near miss

b Lost-time accident (Non-fatal)

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A type of accident that results in the death of the injured person.
a. Non-lost time accident
b. Lost-time accident (Non-fatal)
c. Lost-time accident (Fatal)
d. Near miss

c Lost-time accident (Fatal)

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A type of accident that will not prevent the injured person from reporting to his duly designated work on the working day following the day of injury and thereafter.
a. Non-lost time accident
b. Lost-time accident (Non-fatal)
c. Lost-time accident (Fatal)
d. Near miss

a Non-lost time accident

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A vertical or inclined underground opening driven downward from one level to another level or from the surface to a level:
a. Raise
b. Shaft
c. Winze
d. Crosscut

c Winze

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Building or structure where a large quantity of explosives is kept.
a. Permanent storage magazine
b. Issuing magazine
c. Portable magazine
d. Safety and Health Office

a Permanent storage magazine

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Building or structure where a small or moderate quantity of explosives is kept.
a. Permanent storage magazine
b. Issuing magazine
c. Portable magazine
d. Safety and Health Office

b Issuing magazine

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For a circular tunnel under biaxial stress (p1, p2), the tangential stress at the roof (θ = 90°) is:
a. σθ = 2p1 – p2
b. σθ = 3p1 – p2
c. σθ = p1 + p2
d. σθ = 3p2 – p1

b σθ = 3p1 – p2

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For a rock with ν = 0.33, the theoretical coefficient of lateral earth pressure at rest (K0) is:
a. 0.25
b. 0.33
c. 0.50
d. 1.00

c 0.50

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For Class C Water Bodies, what is the maximum allowable TSS value?
a. 50 mg/L
b. 65 mg/L
c. 80 mg/L
d. 110 mg/L

c 80 mg/L

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Hoisting equipment for ore materials:
a. Cage
b. Skip
c. Hoist
d. Bucket

b Skip

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How do fluctuations in commodity prices influence the valuation of a mineral deposit?
a. They affect the geological characteristics of the deposit
b. They determine the legal framework for mining operations
c. They impact the projected revenue and profitability of mining the deposit
d. They influence the local community’s acceptance of mining activities

c They impact the projected revenue and profitability of mining the deposit

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If a rock specimen shows only a steep slope in its stress-strain curve, it indicates:
a. High ductility and low stiffness
b. High stiffness and brittle behavior
c. Low stiffness and ductile behavior
d. High toughness but low modulus

b High stiffness and brittle behavior

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If the porosity of a rock sample is 40%, what is the corresponding void ratio (e)?
a. 0.25
b. 0.40
c. 0.67
d. 1.50

c 0.67

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In a triaxial test, σ₃ = 10 MPa and σ₁ at failure = 40 MPa. What is the principal stress ratio (K)?
a. 0.25
b. 0.33
c. 0.50
d. 0.75

a 0.25

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In mineral exploration, what does the term “assay” refer to?
a. A legal document granting mining rights
b. A test to determine the composition and quality of a mineral sample
c. A method of drilling to collect core samples
d. A technique for remote sensing

b A test to determine the composition and quality of a mineral sample

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In mineral valuation, what does the term “Net Present Value (NPV)” refer to? a. The total value of the mineral deposit if extracted today b. The difference between the total revenue and total costs over the life of the mine, discounted to present value c. The annual profit expected from the mining operation d. The total cost of mining equipment required for the project

b The difference between the total revenue and total costs over the life of the mine, discounted to present value

In mine ventilation circuits, what is the arrangement called where airways are connected end to end, ensuring that the quantity of air flowing through each airway is the same? a. Parallel circuit b. Complex network c. Series circuit d. Simple network

c Series circuit

In the classification of mine aerosols, which type consists of solid particles formed by combustion, sublimation, or distillation, typically less than 1 µm in size, with diesel particulate matter (DPM) being a key example? a. Dust b. Fumes c. Smoke d. Fog

b Fumes

In the Mine Safety and Health Standards, this is defined as a condition or practice that could reasonably be expected to cause death or serious physical injury or damage to property prior to the adoption of appropriate measures to counter the risk. a. Accident b. Incident c. Near miss d. Imminent danger

d Imminent danger

It is a large-scale vertical open stoping method, also known as longhole stoping or blasthole stoping: a. Sublevel stoping b. Shrinkage stoping c. Cut and fill stoping d. Block caving

a Sublevel stoping

It is a small-scale stoping method where extracted ore is replaced by a framework of timbers: a. Shrinkage stoping b. Square set stoping c. Sublevel stoping d. Block caving

b Square set stoping

It is a vertical, overhand mining method whereby most of the ore is left in the stope to provide a working platform: a. Cut and fill stoping b. Shrinkage stoping c. Sublevel stoping d. Stull stoping

b Shrinkage stoping

It is mining with the use of individual timbers as main ground support: a. Square set stoping b. Cut and fill stoping c. Stull stoping d. Shrinkage stoping

c Stull stoping

Protected waters and fishery water class I fall under which category? a. Class SA b. Class SB c. Class AA d. Class B

a Class SA

Refers to an underground mass mining method where extraction of the ore depends largely on the action of gravity: a. Sublevel stoping b. Shrinkage stoping c. Block caving d. Square set stoping

c Block caving

The days lost per million man-hours worked. a. Accident severity rate b. Accident frequency rate c. Combined severity-frequency rate d. Days lost

a Accident severity rate

The document that describes the identity of a substance which includes, among others, company product information, composition, information on ingredients, hazard identification, and control and clean-up procedures in cases of accidental spill. a. Material Safety Data Sheet b. Safety and Health Handbook c. Standard Operating Procedures d. Code of Conduct

a Material Safety Data Sheet

The Environmental Work Program is created during which stage of mining? a. Exploration Period b. Development Period c. Exploitation Period d. Rehabilitation Period

a Exploration Period

The first consideration in the cardinal rule of exploitation is to select a: a. Processing method b. Drilling method c. Mining method d. Sampling method

c Mining method

The following are components of CLRF except: a. Mine Rehabilitation Fund b. Environmental Trust Fund c. Mine Waste and Tailings Fees Reserve Fund d. FMRDP

b Environmental Trust Fund

The property of a joint that pertains to the surface unevenness and waviness relative to its mean plane. a. Spacing b. Undulation c. Aperture d. Infill

b Undulation

The review of the EIS by EMB shall be guided by the following general criteria except: a. That environmental considerations are integrated into the overall project planning. b. That the assessment is technically sound and proposed environmental mitigation measures are effective. c. That social acceptability is based on informed public participation. d. That all potential project impacts, regardless of significance, are given equal weight in the assessment.

d That all potential project impacts, regardless of significance, are given equal weight in the assessment

This is a liquid medium used to selectively extract (or leach) elements from its ore. a. Electrolyte b. Reagent c. Lixiviant d. Solvent

c Lixiviant

This is the process of removing loose or unstable rock from the roof or walls for safety. a. Scaling b. Trimming c. Cutting d. Drawpointing

a Scaling

This mining method uses a powerful jet of water to break down a bank, then transports the loosened material through a series of sluices. a. Dredging b. Strip mining c. Hydraulicking d. Placer panning

c Hydraulicking

This refers to the extraction of the crown pillar. a. Slushing b. Robbing c. Caving d. Stoping

b Robbing

What DAO reinstated the EMB as a member of the MMT? a. DAO 2022-12 b. DAO 2017-15 c. DAO 2022-03 d. DAO 2021-19

a DAO 2022-12

What does the term “Pushback” refer to in pit scheduling? a. A method of blasting b. A sequence of mining stages c. A type of haul truck d. A slope stability measure

b A sequence of mining stages

What does the term “Stripping Ratio” refer to? a. Ratio of ore to waste b. Ratio of equipment cost to ore value c. Ratio of waste to ore d. Ratio of recovery rate to selling price

c Ratio of waste to ore

What do you call the rating of the anti-knock characteristics of a grade or type of automotive gasoline? a. Anti-Knock Index b. Research Octane Number c. Motor Octane Number d. Octane Number

a Anti-Knock Index

What is a “resource domain” in mineral exploration? a. The total area covered by a mining permit b. The physical area where exploration activities take place c. A distinct geological area characterized by specific mineralization patterns d. The total volume of ore extracted from a mine

c A distinct geological area characterized by specific mineralization patterns

What is “ore grade” and why is it important in the valuation of a mineral deposit? a. The weight of the ore sample, indicating how much can be extracted b. The concentration of valuable minerals within the ore, determining its economic feasibility c. The size of the ore deposit, showing how extensive the mining operation will be d. The type of mineral found, indicating the potential environmental impact

b The concentration of valuable minerals within the ore, determining its economic feasibility

What is the function of a rib pillar? a. To support the roof of a stope b. To isolate mining blocks c. To provide local support between rooms or panels d. To prevent water inflow

c To provide local support between rooms or panels

What is the main advantage of using remote sensing in mineral exploration? a. It provides direct access to subsurface mineral deposits b. It allows for large areas to be surveyed quickly and cost-effectively c. It eliminates the need for on-site geological surveys d. It guarantees the discovery of economically viable mineral deposits

b It allows for large areas to be surveyed quickly and cost-effectively

What is the primary goal of Optimum Production Scheduling? a. Minimize environmental impact b. Maximize Net Present Value (NPV) c. Reduce equipment size d. Increase stripping ratio

b Maximize Net Present Value (NPV)

What is the primary goal of reclamation in the context of mining? a. To maximize ore extraction b. To reduce the cost of mining operations c. To restore the land to a natural or economically usable state after mining d. To increase the ore grade

c To restore the land to a natural or economically usable state after mining

What is the primary purpose of a geophysical survey in mineral prospecting? a. To map the surface geology of an area b. To detect variations in the physical properties of rocks and soils that may indicate the presence of mineral deposits c. To assess the environmental impact of mining operations d. To estimate the mineral reserves in a deposit

b To detect variations in the physical properties of rocks and soils that may indicate the presence of mineral deposits

What is the primary purpose of a geophysical survey in mineral prospecting? a. To determine the age of rock formations b. To locate underground water sources c. To identify variations in the physical properties of the earth’s subsurface d. To measure the chemical composition of surface soils

c To identify variations in the physical properties of the earth's subsurface

What is the primary purpose of ventilation in a mine? a. To cool the mine workings b. To supply enough air for human comfort and product needs c. To prevent the buildup of methane gas d. To reduce dust levels

b To supply enough air for human comfort and product needs

What is the purpose of a catch berm in open-pit mining? a. To support haul trucks b. To catch falling debris and improve safety c. To increase pit depth d. To improve ore recovery

b To catch falling debris and improve safety

What is the purpose of a vent raise in underground mining? a. Ore transport b. Ground support c. Ventilation d. Water drainage

c Ventilation

What is the role of a feasibility study in the mining industry? a. To assess the environmental impact of a mining project b. To determine the technical and economic viability of a mining project c. To locate potential mineral deposits d. To perform geochemical surveys

b To determine the technical and economic viability of a mining project

What is the significance of “cut-off grade” in mineral resource estimation? a. It determines the depth at which mining can no longer continue b. It specifies the minimum ore grade required for economic extraction c. It indicates the maximum size of a mining operation d. It measures the environmental impact of mining

b It specifies the minimum ore grade required for economic extraction

What is the term for natural rock material that is quarried to obtain blocks or slabs of a specific size and shape? a. Building aggregate b. Dimension stone c. Industrial mineral d. Decorative gravel

b Dimension stone

What is the term for the cumulative energy consumption required to move a desired quantity of air in a mine ventilation system with a single fan? a. Fan head b. Static head c. Mine total head d. Velocity head

c Mine total head

What is the term for the part of total air conditioning dealing with the purity of air? a. Quantity control b. Quality control c. Temperature control d. Humidity control

b Quality control

What is the typical ramp gradient in open-pit design? a. 2–3% b. 5–7% c. 8–12% d. 15–20%

c 8–12%

What psychrometric process reduces both sensible and latent heat, leading to a lower air temperature and moisture content? a. Heating b. Drying c. Evaporative Cooling d. Cooling and Dehumidification

d Cooling and Dehumidification

What term is used to describe the distance between the surfaces of a discontinuity? a. Spacing b. Aperture c. Persistence d. Displacement

b Aperture

What type of bench is left after a cut has been removed? a. Safety bench b. Working bench c. Catch bench d. Haulage bench

a Safety bench

What type of mining method uses the energy from an explosive blast to move a portion of the overburden into the area where the excavator will cast it? a. Terrace mining b. Explosives casting / Cast blasting c. Solution mining d. Block caving

b Explosives casting / Cast blasting

Which environmental factor must be considered during the valuation of a mineral deposit? a. Proximity to urban areas b. Average annual rainfall c. Impact on local wildlife and ecosystems d. Local cultural heritage sites

c Impact on local wildlife and ecosystems

Which equipment is used for vertical ore transport in deep underground mines? a. Conveyor b. Skip hoist c. LHD d. Haul truck

b Skip hoist

Which exploration method involves drilling to obtain continuous core samples from underground? a. Surface mapping b. Trenching c. Core drilling d. Seismic reflection

c Core drilling

Which exploration technique involves the chemical analysis of soil, rock, and water samples to detect the presence of mineralization? a. Geochemical survey b. Geophysical survey c. Remote sensing d. Trenching

a Geochemical survey

Which factor does NOT directly affect equipment selection in mining? a. Orebody geometry b. Ground conditions c. Commodity price d. Production rate

c Commodity price

Which factor does NOT influence Life of Mine (LOM)? a. Ore reserves b. Production rate c. Bench width d. Mining method

c Bench width

Which financial metric is commonly used to assess the profitability of a mining project? a. Gross domestic product (GDP) b. Internal rate of return (IRR) c. Consumer price index (CPI) d. Inflation rate

b Internal rate of return (IRR)

Which haulage method is most suitable for long-distance bulk material transport in surface mining? a. LHD b. Conveyor c. Underground truck d. Rail system

b Conveyor

Which law requires industries to control emissions of sulfur oxides (SOx), nitrogen oxides (NOx), and particulate matter (PM)? a. RA 9003 b. RA 9275 c. RA 8749 d. RA 6969

c RA 8749

Which method is often used to value mineral resources based on the future cash flows they are expected to generate? a. Comparable sales method b. Cost approach c. Discounted cash flow (DCF) analysis d. Market approach

c Discounted cash flow (DCF) analysis

Which mining method is commonly used for coal seams? a. Sublevel Stoping b. Block Caving c. Room and Pillar d. Shrinkage Stoping

c Room and Pillar

Which of the following best describes “ore grade”? a. The depth at which ore is found b. The volume of ore extracted per day c. The concentration of valuable minerals within the ore d. The cost of extracting the ore

c The concentration of valuable minerals within the ore

Which of the following factors is least likely to influence the economic viability of a mineral deposit? a. Market demand for the mineral b. The current price of the mineral on the global market c. The distance of the deposit from major highways d. The cost of extracting and processing the ore

c The distance of the deposit from major highways

Which of the following is a component of Elements of Mining? a. Ventilation Design b. Geostatistics c. Ramp Width d. Haulage Equipment

b Geostatistics

Which of the following is a component of the production cycle in underground mining? a. Ventilation b. Drilling c. Shaft sinking d. Grouting

b Drilling

Which of the following is a key consideration in mine drainage planning? a. Commodity price b. Haul road width c. Hydrogeological assessment d. Ore grade

c Hydrogeological assessment

Which of the following is NOT a potential source of dust in underground coal mining? a. Cutting and loading operations b. Roof bolting c. Haulage and transport d. IC Engine Emission

d IC Engine Emission

Which of the following is considered a heuristic optimization method in mine planning? a. Lerchs-Grossmann Algorithm b. Genetic Algorithm c. Floating Cone Method d. Integer Programming

b Genetic Algorithm

Which of the following is NOT a factor affecting cycle time? a. Operator skill b. Ore grade c. Mine layout d. Equipment performance

b Ore grade

Which of the following is not explicitly listed as a source of heat in mines? a. Autocompression b. Underground Water c. Solar radiation on the surface d. Machinery and Lights

c Solar radiation on the surface

Which of the following laws are dedicated for the conservation of wildlife resources? a. RA 9147 b. RA 9275 c. RA 9003 d. RA 8749

a RA 9147

Which of the following serves as proof of a company’s satisfactory environmental management and community relations in its past mineral resource use or mining-related ventures? a. EWP b. CEMCRR c. EPEP d. EIA

b CEMCRR

Which of the following underground mine developments is typically constructed first to provide access to the ore body for excavation? a. Cross-cut b. Stope c. Raise d. Winze

a Cross-cut

Which stage of cost estimation has the highest accuracy? a. Preliminary b. Conceptual c. Feasibility Study d. Detailed Engineering

d Detailed Engineering

Which type of centrifugal fan blade curvature is described as lower head but more energy-efficient, making it better suited for mine ventilation where stable static pressure is critical? a. Forward-curved b. Radial c. Mixed-flow d. Backward-curved

d Backward-curved

Which type of heat is absorbed or released during a phase change of a substance without changing its temperature, and cannot be measured directly with a thermometer? a. Sensible heat b. Geothermal heat c. Latent heat d. Autocompression heat

c Latent heat

Which type of sampling method is most commonly used in preliminary exploration to identify areas of interest? a. Channel sampling b. Grab sampling c. Core drilling d. Pit sampling

b Grab sampling

Which underground entry is driven horizontally from the surface into a coal seam? a. Shaft b. Adit c. Drift d. Raise

c Drift

Which underground support system uses interlocking timber frames for heavy ground conditions? a. Timber sets b. Square set c. Rock bolts d. Steel arches

b Square set

Why does water reduce rock strength in most cases? a. It increases cementation between grains b. It adds to the total stress carried by solids c. It reduces effective stress by increasing pore pressure d. It lowers the density of the rock

c It reduces effective stress by increasing pore pressure

D1 Flashcards

(100 cards)