Mixed Reviewer 7
d
30. Which of the following methods is most applicable in mapping or locating wet shears, clays or gravel deposits and in determining their thickness? A. magnetic D. resistivity B. telluric E. gravity
c
1. Which of the following is not a deterrent in the quality of coal? A. low heating volume D. high moisture content B. high sulfur content E. high chlorine content C. high heating value
d
10. Which of the following terms is not related to blasting? A. airdox C. cardox B. hydrox D. chlorox
c
100. In underground mine development, which of the following is driven purposely to gain access to an area by by-passing certain areas, structure or installations? A. doghole D. tunnel B. drift E. crosscut C. counterdrive
b
11. Which of the following is a deterrent in the quality of coal? A. carbon content D. heating value B. sulfur content E. BTU
d
12. Which of the following local terms refer to ore materials in a mine? A. undersize D. nava B. mulok E. oversize C. slimes
b
13. Under the MGB Mine Safety Rules and Regulations, what is the classification of mines with no less than 150 and 250 employees in the underground and surface works respectively? A. Class C Mines D. Class D Mines B. Class A Mines E. Class D Mines C. Class B Mines
c
14. Which provision of the New Mining Act was very recently voided by the Supreme Court declaring the same as unconstitutional? A. MRFC D. EPEP B. CLRFC E. MMT C. FTAA
b
15. It is a high explosive composed essentially of a mixture of nitroglycerin, nitrocellulose, ammonium nitrate, sodium nitrate and carbonaceous material, among others. A. safety fuse D. ignitecord B. dynamite E. ammonium nitrate C. blasting cap
c
16. In mineral prospecting, which of the following metals exhibit an anomalous color of red? A. copper D. gold B. arsenic E. silver C. mercury
e
17. The mine delivery of Padcal's blockcave mine assayed 12% chalcopyrite, 16% chalocite, 10% bornite and 6% pyrite. What is the total % copper content of the mill feed? A. 33.27% D. 13.27% B. 53.27% E. 23.27% C. 43.27%
c
18. As the Mine Superintendent of anewly rehabilitated pre-war underground gold mine, you are tasked to dewater a mine shaft in 60 days by pumping 20 hours per day. The mine shaft originally contains 400,000 cu.m. of water and receives a daily influx of 5,000 cu.m. How many pumps will you install if the capacity of each pump is 1,000 galloons per minute and pumping at an efficiency of 60%? Allow additional standby pumps of two (2) units. Assume that there are 264 gallons per cu.m. A. 6 units D. 9 units B. 7 units E. 8 units C. 3 units
d
19. Which of the following refers to the geologic process where hear surface rocks or deposits are altered thru chemical action of water and mechanical action of temperature? A. natural deposition D. weathering B. metamorphosis E. sedimentation C. orogeny
c
2. The copper produced by PASAR is exported in which of the following forms? A. ferrocopper D. silicocopper B. manganocopper E. copper anode C. copper cathode
a
20. What method of ventilation uses fans, vents, tubings and baggings? A. mechanical ventilation B. upcast/downcast C. natural draft D. air/water hammer E. electrostatic precipitation
b
21. Which of the following refers to the Small Scale Mining Act? A. RA 8182 D. RA 7942 B. RA 7076 E. RA 4274 C. RA 6147
e
22. Which of the following stakeholders refers to Filipino citizens who individually or in a group, voluntary form mining cooperatives and duly licensed by the DENR to engage in the extraction of minerals from the ground? A. landowners B. Phil. Society of Mining Engineers (PSEM) C. Claimowners D. Chamber of Mines E. Small scale miners
c
23. Which of the following DENR Administrative Orders (AO) is about the Rules and Regulations Governing the Granting of Processor's Permit. Related to Small Scale Gold Mining? A. DENR AO No. 51, Series of 1996 B. DENR AO No. 06, Series of 1986 C. DENR AO No. 05, Series of 1989 D. DENR AO No. 09, Series of 1989 E. DENR AO No. 07, Series of 1989
b
24. Which of the following are the most important components of a refractory chromite ore? A. Cr203 and S B. Cr203 and Al203 C. Cr203 and Cr/Fe ratio D. Cr203 and screen analysis E. Cr203 and MgO
c
25. Textile dyestuffs are end products of which of the following? A. metallurgical chromite D. smelting B. copper leaching E. refractory chromite C. chemical grade chromite
a
26. What is the minimum age requirement for underground mine workers? A. 18 D. 20 B. 21 E. 45 C. 16
a
27. Which of the following orebodies is best mineable by sub-level stoping? A. orebodies that are deep, have regular and well defined size and shape with highly competent foot and hanging walls B. orebodies that are heavily fractured and faulted C. orebodies that pinch and swell D. orebodies that are low grade but shallow seated E. poddyform orebodies
b
28. It is a lost time accident that results to death of the victim A. lost-time accident B. fatal lost-time accident C. non-fatal lost time accident D. dishonorable discharge E. indefinite sick leave
b
29. In rock mechanics, the ratio of the stress to the strain is called A. rapture limit D. tensile strength B. modulus of elasticity E. shear strength C. Poisson's Ratio
d
3. In open pit mining, what do you call the ratio of the weight of explosives needed to break a ton of ore or waste material? A. powder keg D. powder factor B. powder ratio E. powder consumption C. powder balance
a
31. A Class C mine must have at least which of the following? A. 1 part time safety engineer and 1 full time safety inspector B. 2 full time safety directors C. 1 full time safety inspector D. 1 part time safety inspector and a deputy inspector E. 1 full time safety engineer and 1 full time safety inspector
d
32. The full implementation of RA 7076 and the realization of its benefits to the countryside is hampered in most provinces due to which of the following reasons? A. too much interference by NGOs B. too much political interference C. too much interference by the Catholic church D. all of these E. incompetence of certain LGU and DENR officials
d
33. Which of the following is/are the major components of sustainable development? A. environmental relevance B. social acceptability C. contribution to national economy D. all of these
a
34. Malangas Coal Mine, when it was operated by PNOC-Coal, was using which of the following mining methods in its coal operations in Malangas, Zamboanga del Sur? A. room and pillar D. none of these B. shrinkage E. cut and fill C. square set stoping
b
35. Which of the following mine classifications has the most number of workers? A. Class B mines D. none of these B. Class A mines E. Class C Mines C. Class D mines
e
36. Which of the following is the most economical mining method applicable to low grade but shallow seated porphyry copper deposits? A. hydraulicking D. small scale mining B. blockcaving E. open pit mining C. underground cut and fill
c
37. If the feed to a copper to a copper mill assays 10% Chalcopyrite, what is the sulfur content if the specific gravity of the ore is 2.5? A. 5.7% D. 2.7% B. 3.7% E. 4.7% C. 1.7%
a
38. Which of the following natural materials possess excellent plastic properties? A. Clay D. Limestone B. Anthracite E. Gypsum C. Lignite
d
39. In open pit mine planning, which of the following refers to the tonnage of waste that will be stripped to expose a ton of ore? A. Mining rate D. Stripping ratio B. Blending ratio E. Powder factor C. Milling rate
e
4. In large surface excavations such as open pits or open casts, what do you call the water found in the zone of saturation? A. mineral water D. run-off water B. capillary water E. phreatic water C. moisture
e
40. What explosives are permitted in gassy or dusty atmospheres? A. High density explosives D. ANFO B. Commercial dynamites E. permissible explosives C. Ammonia dynamite
e
41. What do you call the surface opening of a horizontal or nearly horizontal underground working or heading? A. Level D. Raise B. Adit E. Portal C. Shaft
c
42. Which of the following is the economic mineral of antimony? A. Chalcocite D. Psilomelane B. Enargite E. Chrysocolla C. Stibnite
b
43. A record of geologic facts in their correct space relations is called what? A. Pit design D. core log B. Geologic map E. assay map C. Aerial photograph
e
44. What coal mining method uses continuous mining machines and hydraulic roof supports? A. Bucket wheel excavator D. Room and pillar B. Shortwall mining E. Longwall mining C. Strip mining
e
45. A quartz vein deposit was recently discovered in an existing gold mine. The vein deposit was first intercepted by a diamond drill at elevation 850 meters. A second diamond drill hole also intercepted the same gold bearing vein deposit at lower elevation at 820 meters but 30 meters further to the left. If the gold bearing quartz vein deposit maintains uniform thickness throughout, what is the dip of the vein? A. 40 degrees D. 60 degrees B. 35 degrees E. 45 degrees C. 50 degrees
e
46. Which of the following refers to the working face of an underground stope? A. crown D. muck B. back E. breast C. pillar
b
47. The extraction of gold ores from the Diwalwal Gold Rush area in Compostela Valley had been recently rationalized by the government for safety, environmental and social reasons. The area is now under supervision and management of which of the following agencies. A. PNP and PA D. PMRB and LGU B. NRDC and MGB E. DTI and DOE C. DOLE and PNP
d
48. The vertical distance below bench bottom is called: A. burden D. sub-grade B. drill depth E. free face C. spacing
e
49. In Mine Safety, which of the following refers to an accident where the injured were unable to report to work on the day following the accident? A. Non-lost time accident D. frequency accident B. Severity accident E. lost time accident C. Accident index
c
5. In an underground mine employing square set stoping method, what do you call the chamber where ore is actually extracted? A. adit D. sump B. dog hole E. winze C. stope
d
50. In underground headings where water seepage is strong, what do you call that mine support where cement, at pre-determined mixture with screened sand and other sealing additives, is sprayed over the affected area? Sometimes used screens are used as reinforcing to ensure better attachment of the concrete in the affected walls. A. Steel arc support D. Shotcreting B. Rock bolting E. capable splicing C. Screen supports
a
51. In an open pit mine, the horizontal distance between the bench toe and crest at equal elevation is called: A. Safety berm width D. bench angle width B. Interramp width E. road width C. Bench height
d
52. In a mining cycle, which of the following activities is initiated last? A. drilling D. crushing B. blasting E. loading C. hauling
a
53. The Chromite concentrate of Heritage Resources showed the following screen analysis: SIEVE FRACTION WEIGHT ASSAY + 1.00 mm 20 MT 2% Cr203 -1.00 mm + 0.75 mm 45 MT 24% Cr203 -0.75 mm + 0.50 mm 60 MT 35% Cr203 -0.50 mm + 0.25 mm 120 MT 15% Cr203 -0.25 mm + 0.10 mm 10 MT 2% Cr203 -0.10 mm 10 MT 1% Cr203 A particular export market requires only the size fraction -1.00 mm + 0.25 mm inclusive. If the concentrate is re-screened to meet market specifications, what is the resulting grade assuming 100% screen recovery? A. 22.13% D. 20.13% B. 35.13% E. 25.13% C. 32.13%
a
54. In coal deposition, what does strata mean? A. Beds or layers D. mother formation B. Country rock E. Karst formation C. Host rock
c
55. The feed to a copper beneficiation plant is known to contain 8% Chalcopyrite, 6% Bornite and 5% Chalcocite. What is the total percent copper content of the ore feed? A. 13.57% D. 12.57% B. 14.57% E. 10.57% C. 16.57%
c
56. In diamond drilling of heavily brecciated formations, which of the following is used to control water losses due to seepages and improve drilling water circulation and better sludge collection? A. Soapstone D. Bentonite B. Lateritic mud E. Paint pigment C. Barite
b
57. Which of the following refers to a working face of an underground stope? A. Pillar D. crown B. Breast E. back C. Muck
b
58. Which of the following refer to a complex ore deposit consisting of various minerals bearing copper, gold, silver, zinc and other metals? These complex minerals are very difficult to beneficiate or recovered. A. Lode deposit D. porphyry deposit B. Kuroko deposit E. vein deposit C. Placer deposit
e
59. Which of the following refers to an underground mine opening where fresh air is injected with the aid of mechanical means such as ventilation blowers or fans? A. Venture D. upcast B. Downcast E. air tunnel C. Shaft
e
6. In underground mines, what do you call the vertical or nearly vertical opening that is driven from a level to the upper level? A. shoot D. doghole B. sump E. raise C. winze
b
60. In Mine Ventilation, "Natural Draft" is commonly known as: A. Air fresher D. wind drainage B. Natural ventilation E. artificial ventilation C. Wind pocket
e
61. Which of the following capacities produces the highest level of profits regardless of tonnage? A. Breakeven capacity D. Maximum capacity B. Breakeven tonnage E. Optimum capacity C. Optimum waste to ore ratio
d
62. Which of the following regulates small scale mining in the Philippines? A. RA 7942 D. RA 7076 B. RA 6521 E. RA 4274 C. RA 8981
b
63. In underground mining, an overhand mining method where the ore is mined and remains in the stope as temporary support for the walls and at the same time serve as working platform for miners is called: A. Block caving D. cut and fill stoping B. Shrinkage stoping E. top slicing C. Square set stoping
b
64. Which of the following mining methods is currently being used by Heritage Resources and Mining Corporation in extracting chromite bearing laterite at its chromite mine in Homonhon Island? A. In situ leaching D. placer mining B. Open pit mining E. sluicing C. Hydraulicking
a
65. Which of the following exploration or development methods is best and widely used in establishing the area, depth and thickness of mineralization? It is also used to gather data for ore reserve estimation and technical information essential in mine planning and design? A. Core drilling B. Geostatistical analysis C. Geochemistry D. Geophysics E. Induced polarization or RP
a
66. The ratio of the volume of a mineral in its solid state to its volume when broken is called: A. Swell factor D. weight ratio B. Coefficient of expansion E. powder factor C. Volume ratio
d
67. What do you call the maximum slope at which a heap of loose materials will stand without sliding? A. gradient slope D. angle of repose B. angle of draw E. working slope C. drainage angle
b
68. Prior to the shutdown of its open pit mining operations, Maricalum Mining which used to be the second biggest open pit mine in the Visayas, was..using, which of the following haulage system for disposal of its mine waste to the waste dumps? A. Gravity haulage system B. Conventional conveyor belt system C. Aerial tramway system D. Pumping system E. Screw type conveying system
b
69. Atlas Mining, North Davao Mining and Benguet-Dizon were three of the former major producers of copper concentrates in the Philippines. Which of the following was their common mining method? A. Small scale mining B. Open pit mining C. Solution mining D. Leaching E. Glory hole
e
7. A word commonly used in rock mechanics as a collective term to all fractures or features in a rock mass such as joints, faults, shears, etc that have zero or relatively low tensile strengths is called? A. structure D. fabric B. lineation E. discontinuity C. fracture plan
b
70. Which of the following refers to a waste material overlying a mineral deposit? A. host rock D. gossan B. capping E. footwall C. hanging wall
d
71. It is a methodical and systematic process of combining various materials to produce a uniform mass, more or less. A. salting B. test pitting C. controlled blasting D. blending E. sampling
d
72. Atomic absorption is fast, cheap and very common method of detecting what metal? A. diamond D. copper B. platinum E. vanadium C. titanium
a
73. The percentage increase in volume occupied by a given mass of solid material after it has been blasted or broken is called: A. swell factor B. rock quality designation C. powder factor D. rock multiplicand E. coefficient of compaction
a
74. In open pit mine planning, what do you call the factor used in converting the volume into weight or tonnage? A. tonnage factor D. powder factor B. volume ratio E. optimal weight C. swell factor
b
75. Why did Atlas Mining shutdown operation in Cebu? A. insurgency problems D. lack ECC B. low metal prices E. depleted ore reserve C. labor strike
c
76. In underground timbering, what do you call the main part that supports the roof or back of an underground working? A. girt D. post B. wedge E. still C. cap
b
77. Which of the following rock formation is characterized by karst topography? A. diorite plug D. andesite formation B. limestone formation E. coal formation C. basalt dome
a
78. In underground mining, it is referred to as a large scale and mechanized method of mining an ore body without the use of conventional mine cars and locomotives. A. trackless mining D. minahang bayan B. small scale mining E. open pit mining C. bucket wheel excavators
c
79. Which of the following is used to maintain safe slope stability in open pits, quarries or earth excavations? A. shotcreting D. concreting B. rock bolting E. good slope drainage C. all of these
e
8. Which of the following mining methods is used in mining marble, granite, limestones, slate, etc whose physical properties are important in the construction industry? A. glory hole D. solution mining B. placer mining E. quarrying C. block caving
d
80. The operating parameters of a new open pit mine in Nueva Viscaya which is scheduled for development under the MPSA system are as follows: -Ore tonnage per annum 10,440,000 MT -Strip ratio 0.77:1 -Material specific gravity 2.75 -Bench height 12.50 meters -Sub-grade 2.50 meters -Drill pattern 10 x 10 meters -Drill penetration rate 110.0 meters per shift -Drilling days per year 348.0 days -Drilling shifts per day 3.0 shifts -Drill utilization 65.0% -Time efficiency 50 min. per 60 min As the newly hired Drilling and Blasting Superintendent, how many rotary drills (excluding spares) will you need to sustain the total broken muck requirements of the open pit? Consider the theoretically computed fraction unit as one (1) unit. A. 8 drills D. 2 drills B. 4 drills E. 6 drills C. 5 drills
a
81. Leather tanning agents are the end products of which of the following? A. Chemical grade chromite B. Metallurgical grade chromite C. Dessimilated copper D. Kuroko ores E. Refractory grade chromite
e
82. Which of the following physical properties of rocks refers to the ability of rocks to resist compression? A. rock work index B. rigidity C. tensile strength D. shear strength E. compressive strength
c
83. In open pit mining, what do you call the ratio of waste to be stripped to be able to mine a ton of ore? A. powder factor D. digging cut-off B. ratio of repose E. excavation sequence C. waste to ore ratio
b
84. In designing hoisting system or underground haulage, whichnof the following parameters are very important? A. tonnage of waste to be hoisted B. all of these C. availability of adequate power supply D. tonnage of ore to be hoisted E. depth of orebody
e
85. Which of the following mining methods is currently being used by Taganito Mining Corp. at its nickel mine in Taganito, Surigao del Norte? A. combined underground and open pit mining methods B. underground cut and fill mining method C. amphibious nickel recovery method D. in-situ nickel leaching mining method E. open pit mining method
c
86. In planning of open pit mines, the optimum pit limits should be established in order to? A. none of these B. determine the total manpower required C. determine the total mineable reserves, ore grade and stripping ratio D. determine the best and most economical drainage methods applicable E. determine the blasting requirements of the mine
d
87. Which of the following refers to a locality where 50 or more transient local miners are extracting more than 5 tons of ore per day? A. Quarry Permit D. gold rush area B. MPSA E. claim area C. FTAA
b
88. How do you call the surface excavations of coal seams that are shallow seated but wide in occurrence that need sequential coal winning then backfilling? A. open pit D. deep benching B. open cast E. trenching C. small scale mining
d
89. A high grade gold vein was sampled by channel sampling and showed the following assays: SAMPLE NO. WIDTH (cm) ASSAY (GMT) 1 15 3.0 2 12 3.5 3 10 5.1 4 12 5.5 5 15 6.0 6 15 6.3 7 18 7.3 8 17 8.8 9 19 8.5 10 18 9.0 Assuming that the samples were taken at regular intervals, what is the average grade of the gold vein? A. 7.58 gmt D. 6.58 gmt B. 5.58 gmt E. 4.58 gmt C. 8.58 gmt
d
9. Aside from limestone, which of the following is an important mineral component in the production of cement? A. garnierite D. gypsum B. gabbro E. laterite C. basalt
a
90. Blasting agents are those that are: A. explosives ingredients that meet the criteria for insensitivity to initiation B. can be handled by any person or persons who do not need to secure a license to possess and permit to purchase and move explosives C. can be detonated by #6 blasting caps D. loaded in bulk into the blastholes
b
91. In a conventional mine haulage system, what do you call the timbers that are used as footings for mine rails and at the same time serve as spreaders for consistent spacing of rails? A. frog ties D. post ties B. track ties E. sill ties C. rail ties
d
92. What is a mineral resource that was established only based on one dimension, usually surface interpretations and using very limited samples and measurements? A. none of these D. geologic ore reserve B. mineable ore reserve E. positive ore reserve C. measured ore reserve
c
93. Which of the following is one of the many uses of chemical grade chromite? A. ferrosilicon D. ferromanganese B. ferrochrome E. stainless steel C. ordinary matches
d
94. The chromite concentrate exports of Heritage Resources were assayed to contain 48% chromite and 25% magnetite. What is the calculated Cr:Fe ratio of the concentrate? A. 5.23:1 D. 1.23:1 B. 4.23:1 E. 3.33:1 C. 2.23:1
d
95. Conventional mine planning techniques for open pit mines are designed to maximize the utilization of mineral resources. Recent developments in open pit mine planning have led to the evolution of mine planning techniques that optimize, rather than maximize, the utilization of mineral resources thereby resulting to best economic conditions at known functions of time. Which of the following is a pit optimization technique now very common in application all over the world? A. graphical method D. Lerch-Grossman Algorithm B. polygon method E. krigging C. moving cones
e
96. In underground room and pillar method, what do you call the machine, which is hydraulically operated, that is used to win coal by cutting the seam at regular height and continuously feeding the coal to series of lorries or conveyor belt? A. none of these D. pneumatic loader B. bucket wheel excavator E. continuous coal miner
a
97. Sub-level shrinkage stoping is a combination of shrinkage and sub-level caving mining methods. This mining method was developed purposely to reduce the adverse effects of which of the following: A. stability problem in sub-level caving as mining progresses deeper and to minimize dilution. B. dilution in shrinkage stoping C. drainage problem D. problems of mining at depth E. problems of mechanized mining
d
98. Which of the following refers to the type of mine ventilation where density change in air column causes alteration in natural draft pressure resulting to unpredictable volume of air flow? A. venture type ventilation D. natural ventilation B. rock dusting E. bagging C. mechanical ventilation
a
99. Which of the following refers to the type of blasting where large charges of explosives are loaded in small adits into the bench face or quarries? A. coyote blasting D. blockholing B. dynamiting E. bench blasting C. dogholing
