Mining Methods & Mine Ventilation Exam Paper PDF

1, 45 SUBJECT: CORRELATION 2 EXAM NO.: 3 TOPICS: MINING METHODS & MINE VENTILATION INSTRUCTION: Answer the following items by shading the correct letter on your answer sheet. B I. Isamethod of...

1, 45 SUBJECT: CORRELATION 2 EXAM NO.: 3 TOPICS: MINING METHODS & MINE VENTILATION INSTRUCTION: Answer the following items by shading the correct letter on your answer sheet. B I. Isamethod of mining for surface highwal or outcrop recovery of coal by boring or excavation openings. A. Drift mining 8. Auger mining C. Strip mining D. single bench mining 2. The amount of oxygen in underground mines required under the "Revised Mines Safety Rules and Regulations" is: A. 18% by volume C. 20% by volume B. 19% by volume D. 21% by volume 3. In planning and development, what is the main factor for determining the bench height in an open pit? A Blast pattern design C. Subrill E. Volume of material to be blasted B Equipment specification D. Groundwater conditions B 4. Occurs when an obstruction to theflowisencountered and the velocity of the medium is great enough. D. Laminar Flów E. Turbulent Flow A. Coagulation B. Impirngementt. Brownian Motion 5. What is the importance of defining the pit limit? A To determine the amount of minable ore B To determine the number of equipment to use in the extraction of ore C To determine the cut-off grade of minerals of value D To determine the life of mine E Allof the above 6. It is the underground mine gas otherwise called as "white damp". A. Nitrogen dioxide C. Methane B. Hydrogen Sulfide D.Carbon monoxide B 7. Refers to the timbering or concrete around the mouth or top of a shaft. A Support B. collar C. rockbolt D. square set C 8. Cut and fillstooping, shrinkage stoping, VCR stooping and long-wall mining are methods that are: A. Naturally supported C. artificially supported B. Unsupported D. None of the above 9. How many drivers are required for a mining company that operates 10 dump trucks, running 24 hours a day in a 2-shift schedule, considering 85% mechanical availability and 10% manpower availability? A 15 B.8 C. 10 D. 20 E. 19 L 10. The condition of the surrounding rock in In-situ mining? A Consolidated B. Unconsolidated C. Permeable D. ImpermeableE. Porous 11. Underground mining method used to extract mineraldeposits that are roughly tabular, strong, flat or steeply dipping, and generally in contact with strong wall rock. A. Caving B. Supported C. In-situ leaching D. unsupported. + 12. Atype of anemometer suitable for measuring very high velocities than special anemometers. A Vane anemometer B. Velometer C. Pitot tube apparatus D. Indicating anemometer. 13. AllunitA. operations involved in excavating or C.moving Materials handling B. Loading bulk minerals Hauling during mining. D. Hoisting + 14. Mine gas produced as a result of poor blasting. A. Methane B. Nitrous Oxide C. Carbon Monoxide 'D. Hydrogen E. None of these 15. Anoverhand method in which the ore is mined in horizontal slices and remains in the slope as a temporary support for the walls and to provide a working platform. A Overhand Cut-and-Fill Stoping C. Top Slicing E. StullStoping *B. Sublevel Caving D. Shrinkage Stoping 16. The concept of replacing the intermittent operations of rock breakage and material handling in mining with asystem of continuous extraction. A Automation B. Rapid excavation C. Novel method D. Robotics. 17. The underwater excavation of a placer deposit, usually carried out from a floating vessel which may in corporate processing and waste disposal facilities. A Leaching B.Hydraulicking C. Dredge D. Quarrying E. None of these 18. Open pit excavation from which ore is removed by gravity through a raise or raises connecting to under ground haulageways. A. Placer mining B.Strip mining C. Glory hole D. Sluicing 19. Themixture of gases which remains in a mine after a mine fire or an explosion of fire damp or coaldust. A. Fire damp B. Stink damp C. Black damp D. After damp  SUBJECT: CORRELATION 2 EXAM NO.: 3 TOPICS: MINING METHODS & MINE VENTILATION 20. During the first shift of a 24-hour operation witha 2-shifting schedule. adrill machine was in operatrono 10.5 hours and underwent repairs for 0.5 hours. Within this time frame. the drill machine achieved d production of 251 meters. Calculate the percentage utilization of the drill machine during the rirst s A 86% B. 87% C. 88% D. 89% E. None of these 21. The practice of removing the gas contained in a coal seam and adioining strata through wellbores, aril holes, and pipelines. A Methane drainage C. Acid mine drainage B. Well production D. borehole extraction. 22. It is the process wherein large quantities of hot water are introduced through wells drilled into buried de posit of native sulfur. A. Frasch process B. In-situ leaching C. Acid-leaching D.Cyanidation. D 23. Amethod of caving that utilizes the weight of an ore column that is being caved to crush itself intosizes small enough to pass through draw points that have been prepared A. Sublevel caving beforehand. B. Top slicing C. Longwall mining D. Block caving. 24. It is a vertical or horizontal opening to the surface where air aid of different fans. enters and circulate inside the mine with the A. Downcast B. Exhaust C. Inlet D. Intake. B L25. In borehole extraction (agueous extraction),the rock should be: A Permeable and Competent C. Consolidated E. Any type B Competent and Impermeable D. Unconsolidated 26. Produces pressure by imparting a tangential acceleration to air as it A. Centrifugal fan B. Axial flow fan tC. Auxiliary fan proceeds through D. Exhaust fan. the fan impeller. 27. A surface mining method where the overburden is stripped first and dumped at the same time. Then the orebody is mined, horizontaly in a single bench. A. Multiple bench B. Strip mining C. Dredging D. Glory hole 28. It is a timbered stope but classified as a self-supporting opening because the timbers are not used as support but to provide working platforms for miners. The method is applicable to very narrowveins so that the timbers to be used are normally 5 -6 ft. A. Longwall mining B. Square set C. Stull stope D. Topslicing 29. It is also called back 'pressure results' from the inside of the vent tube or drift not being perfectly smooth, the air cannot move along the tube or drift as fast as the fan would like to blow more air into the airway thus producing friction. A. Velocity head B. Static head C. Load of a fan D. Fixed pitch 30. It is a type of ventilation which is efficient and generally dependable. A. Naturel ventilation C. Natural draft B. Lime dusting D. Mechanical ventilation 31. The most expensive among the placer mining methods. A. Dredging B. hydraulicking C. sluices D. rocker 32. Aterm A applied to carbon monoxide, Stink damp or atmosphere B. Fire damp containing lethal quantities C. White damp of carbon monoxide. D. After damp 33. The threshold limits value of hydrogen sulfide as per "Revised Mines Safety Rules and Regulations". A. 0.01% by volume C. 0.10% by volume B. 0.20% by volume D. 0.30% by volume 34. An effective way tooperatea mine with conventional haulage methods in an inclined seam or bed is to drive all openings cross-pitch, that is: A at an angle to the dip of the deposit C. at an angle to the strike of the deposit B. at an angle half the dip of the deposit D. at an angle 450 to the dip of the deposit 35. It is the underground mine gas otherwise called as "marsh gas". A. Nitrogen dioxide C. Methane B. Hydrogen sulfide D. Carbon Monoxide 36. Asurface or near-surface deposit, usually tabular and may be of considerable areal extent, containing mineral particles in detritus. 'A. Detrital deposit B. Lenticular deposit C. Tabular deposit D. Massive A 37. It is the underground mine gas otherwise called as "choke or black damp". A. carbon dioxide C. Methane B. Hydrogen Sulfide D. Carbon Monoxide (38. The total area around an airwayis called SUBJECT: CORRELATION 2 EXAM NO.: 3 TOPICS: MINING METHODS & MINE VENTILATION A. Regulator D. Resistance Surface B. Surface Area C. rubbing Surface B39. Underground mining method used by small-scale miners. these A. Compressor Mining B.Gophering C. Square-set Stoping D. Room-and-Pillar E. All of mine or the face or bank on L he uneXcavated face of exposed overburden and coal or an ore in an opencast the uphill side of a contour strip mine exXcavation. A. Bench face D. Ledge E. Bench height B. Outcrop C. Highwall 41. According to the fan laws, twice the volume develops how many times the pressure? A. 7 times the pressure C.5 times the pressure B. 6 times the pressure D. 4 times the pressure O42. Methane is explosive with this range of concentration: A. 1%-10% by volume C. 10%-20% by volume B. 15%-25% by volume D. 5%-15% by volume O43. It is the oldest method of mining both coal and most metallic ores. D. Block caving B. Room-and-pillar C. Sublevel caving A. Longwall mining attached to a gravity concentrating facility (jigs, W 44. Basically a continuous large-volume digging machine platform. etc.) withwaste removal systems, contained on a floating A.Bucket-wheel excavator B. Scraper C. Dragline D. Dredge. K 45. Prolonged exposure of miners to coal dust causes: E. Scoliosis C. Silicosis D. Asbestosis A. Anthracosis B. Pneumoconiosis a2-shifting schedule, a drill machine was inoperation for 0 46. During the first shift of a 24-hour operation with the drill machine achieved a Within this time frame, 10.5 hours and underwent repairs for 0.5 hours. production of 251 meters. Calculate the percentage utilization of the drill machine during the first shift. B. 86% B. 87% C. 88% D. 89% E. None of these explosion, which of these gases lies on top? 47. In the layering of gases after an underground E. Nitrogen oxide C. Methane D. Hydrogen Sulfide A Carbon Monoxide B. Carbon Dioxide "laughing gas". 48. It is the underground mine gas otherwise called as A. Nitrogen Dioxide C. Methane D. Carbon Monoxide B. Hydrogen Sulfide 49. Hydrogen gas is explosive with this range of concentration. A. 1%-71% by volume C. 10%-80% by volume B. 7%-77% by volume D. 4%-74% by volume 3 50. The most predominant method of mining world wide. A. placer mining B. open pit mining C. underground mining D. hydraulicking