In surface mining, what is the "stripping ratio"?, The amount of ore extracted per hour of machine operation., The ratio of overburden volume to the amount of ore recovered., The ratio of explosive used to the volume of rock broken., The percentage of mineral lost during the processing stage., Which underground mining method is specifically designed for thin, tabular ore bodies such as coal seams?, Block Caving, Longwall Mining, Cut and Fill, Sublevel Stoping, In "Room and Pillar" mining, what is the primary role of the pillars?, A) To provide ventilation channels., B) To act as storage units for equipment., C) To support the roof (overlying rock) and prevent collapse., D) To mark the boundary between different ore grades., 4. In surface mining, bench height is determined primarily by, A) The height of local vegetation., B) The reach of excavation equipment and safety regulations., C) The depth of the groundwater table., D) The chemical composition of the ore., What is the primary principle behind "shrinkage stoping"?, A) The ground is allowed to collapse immediately after mining., B) The ore is dissolved in-situ with acid., C) Broken ore is left in the stope to support the walls during mining., D) The mine is filled with water to prevent cave-ins., What is the primary mechanism of rock breakage in percussive drilling?, A) Shearing force., B) High-frequency vibration., C) Impulsive impact (hammering)., D) Thermal expansion., In rock mass characterization, what does "RQD" stand for?, A) Rock Quartz Density., B) Rock Quality Designation., C) Rapid Quarry Deployment., D) Required Quantity of Drills., Which drilling method uses a diamond-impregnated bit to retrieve a solid cylinder of rock?, A) Blast hole drilling., B) Core drilling., C) Auger drilling., D) Sonic drilling., In rock penetration, what does the term "specific energy" refer to?, A) The amount of fuel used by the drill rig., B) The energy required to break a unit volume of rock., C) The total energy stored in explosives., D) The electrical power required to start a conveyor., Which drilling method is best for very deep, large-diameter holes using heavy pressure and rotation?, A) Jackhammer drilling., B) Hand auger., C) Rotary drilling with a tricone bit., D) Chisel and mallet., Which machine is best suited for continuous excavation of soft materials like clay or lignite?, A) Bucket Wheel Excavator., B) Continuous Miner., C) Electric Rope Shovel., D) Articulated Dump Truck., A "Dragline" is most commonly used in which environment?, A) Hard rock underground mines., B) Narrow vein gold mining., C) Surface coal mining for overburden removal., D) Deep-sea mineral extraction., What does "LHD" stand for in underground mining?, A) Level-Height-Depth., B) Long-Haul-Drill., C) Load-Haul-Dump., D) Lift-Hoist-Drive., A "Jaw Crusher" operates based on which mechanism?, A) High-speed impact., B) Compression between a fixed and moving plate., C) Grinding between two rotating rollers., D) High-pressure water jets., What is the main advantage of In-Pit Crushing and Conveying (IPCC)?, A) It increases the number of trucks needed., B) it reduces costs by replacing trucks with conveyors for transport., C) It makes the ore easier to smell., D) It requires no electricity to operate., In mineral processing, what is the main purpose of "comminution"?, A) To separate minerals based on density., B) To reduce particle size and liberate valuable minerals., C) To chemically dissolve the metal., D) To increase the moisture content for transport., Which concentration method relies on the "hydrophobic" properties of mineral surfaces?, A) Magnetic Separation., B) Froth Flotation., C) Jigging., D) Electrostatic Separation., What is the primary role of a "collector" in froth flotation?, A) To stabilize air bubbles., B) To make mineral surfaces water-repellent (hydrophobic)., C) To adjust the pH of the slurry., D) To wash the machines after use., Which concentration device uses a ribbed surface and side-to-side motion to separate by density?, • A) Hydrocyclone., • B) Shaking Table., • C) Autogenous Mill., • D) Spiral Classifier., What is a "SAG" mill?, • A) A mill that uses only water to grind., • B) A Semi-Autogenous Grinding mill using ore and some steel balls., • C) A mill that uses magnets to grind., • D) A mill used only for gold leaching., Which method is most effective for separating magnetite from silicate gangue?, • A) High-tension separation., • B) Low-intensity magnetic separation (LIMS)., • C) Froth flotation., • D) Heavy Media Separation., What are "tailings" in a mining operation?, • A) The high-grade concentrate ready for sale., • B) The waste material remaining after mineral extraction., • C) The long cables used to pull draglines., • D) Small pieces of gold found in rivers., Which processing step usually follows "crushing" but precedes "flotation"?, • A) Smelting., • B) Grinding., • C) Refining., • D) Roasting., In flotation, what is the "froth"?, • A) The liquid waste at the bottom., • B) The layer of bubbles carrying the concentrate., • C) A chemical used to clean the tanks., • D) The name of the grinding media., What is the function of a "hydrocyclone"?, • A) To melt the ore., • B) To classify particles based on size and density using centrifugal force., • C) To drill holes in the rock., • D) To generate electricity for the mine., In pyrometallurgy, what is "smelting" intended to produce?, • A) A purified aqueous solution., • B) A molten metal/matte and a separate slag., • C) Dry, pulverized rock powder., • D) An enriched gas stream., What is "electrowinning"?, • A) Using magnets to pull iron out of ore., • B) Recovery of metals from a solution using an electric current., • C) A lottery for mine workers., • D) Using explosives triggered by electricity., Which of these is a "hydrometallurgical" process?, • A) Smelting in a flash furnace., • B) Sintering., • C) Leaching with cyanide., • D) Bessemer converting., In metallurgy, "roasting" is primarily used to:, • A) Freeze the ore., • B) Convert sulfide minerals into oxides through heating in air., • C) Clean the heavy machinery., • D) Magnetize the waste rock., In Solvent Extraction (SX), what is the "organic phase"?, • A) A layer of soil for plants., • B) An oil-based liquid containing an extractant to pick up metal ions., • C) The solid rock before it is crushed., • D) The biological waste from the camp..

Mining engineering /Last lesson/

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