Mining methods

C. vertical crater method with LHD

1. What is the current mining method of Lepanto in extracting gold ores from its newly developed Victoria orebody?
A. high capacity shrinkage stoping
B. modernized flat back cut and fill stoping
C. vertical crater method with LHD
D. modified square set stoping
E. mechanized resuing

D. open cut mining

2. Which of the following mining methods is most applicable in mining low grade dessiminated porphyry copper deposits that are shallow occurring?
A. underground cut and fill
B. underground trackless mining using LHD
C. blockcaving
D. open cut mining
E. high capacity sub-level stoping

C. measured ore reserve

3. In valuation of mines and/or mineral properties, which of the following information is most essential?
A. inferred ore reserved D. possible ore reserve
B. geologic ore reserve E. probable ore reserve
C. measured ore reserve

C. wedge

4. In underground timbering, what do you call that small part that is used to tighten spaces between timbers and reduce sliding or movements between timber and tunnel walls?
A. cap D. splice
B. girt E. sill
C. wedge

B. accident severity rate

5. Which of the following refers to the total number of days lost per million man hours worked?
A. total accident rate D. total lost time accident
B. accident severity rate E. accident frequency rate
C. accident prone index

C. all of these

6. Which of the following parameters is/are most important in designing the mining method for a particular ore deposit?
A. price of metal commodity D. tonnage to be mined
B. depth of orebody E. grade of the orebodey
C. all of these

B. all of these

7. What do you call the type of controlled blasting that minimizes damage to the remaining rocks after a blast?
A. smooth blasting D. line blasting
B. all of these E. perimeter blasting
C. cushion blasting

E. small scale mining

8. PD 1899 is a decree promulgated made by then President Ferdinand E. Marcos primarily to promote which of the following?
A. large scale mining
B. national mineral policy
C. none of these
D. foreign investment attraction
E. small scale mining

E. gossan

10. Which of the following indicate a ferrogenous outcrop?
A. horse D. overburden
B. hanging wall E. gossan
C. dike

C. drilling

11. In a mining cycle, which of the following procedures come first?
A. hauling D. crushing
B. loading E. blasting
C. drilling

A. 1.92

12. A copper bearing host rock is blasted and found to exhibit a swell factor of 30%. What is the resulting material density in tons per loose cu.m. (LCM) if the specific gravity is 2.5?
A. 1.92 D. 0.75
B. 2.8 E. 8.33
C. 32.53

D. all of these

13. Which of the following parameters must be considered in evaluating as whether a mineral deposit is feasible to mine or not?
A. cost of establishing and maintaining social acceptability
B. price of metal commodity
C. ore reserves and applicable mining methods
D. all of these
E. environmental effects during and after mining

D. IP or induced polarization

14. Which of the following geophysical methods is sensitive to disseminated mineralization that do not produce resistivity anomaly?
A. seismic
B. telluric
C. electromagnetic
D. IP or induced polarization

C. 4 x 6 inches

15. A hardwood timber is used as post to support an average load of 20,000 pounds, 5 feet high. If the timber has a compressive strength of 900 psi, what would be the typical size of timber support most economical for the purpose?
A. 8 x 6 inches D. 10 x 10 inches
B. 6 x 6 inches E. 12 x 14 inches
C. 4 x 6 inches

C. sample salting

16. It is the act of enriching samples either intentionally or accidentally.
A. assaying D. test pitting
B. high grading E. coning and quartering
C. sample salting

B. Pd 1899

17. Which of the following is also referred to as the Magna Carta for Small Scale Miners?
A. RA 4274 D. RA 1871
B. Pd 1899 E. RA 7942
C. PD 463

C. lode deposit

18. A steeply dipping rod shape mineral deposit is commonly called what?
A. porphyry deposit D. placer deposit
B. seam deposit E. none of these
C. lode deposit

B. breakeven volume

19. It is a volume of production at which total revenues equal total expenditures.
A. maximized capacity
B. breakeven volume
C. overall stripping ratio
D. breakeven stripping ratio
E. tonnage factor

B. frequency rate

20. It refers to the total fatal and non fatal lost time accidents per million manhours.
A. recovery rate D. incidencd rate
B. frequency rate E. severity rate
C. accident rate

B. trackless LHD mining

21. What do you call that new mining method where slushers, chutes and tramways have been eliminated and replaced by more economic and high capacity diesel operated machines?
A. room and pillar D. belt conveyor mining
B. trackless LHD mining E. blockcaving
C. glory hole

B. country rock or host rock

22. The rock formation in which an orebody or mineralization is enclosed is called:
A. quartz vein
B. country rock or host rock
C. andesite
D. bedrock
E. outcrop

B. DAO No. 34, Series of 1992

23. Which of the following rules and regulations implements RA 7076 otherwise known as "People's Small Scale Mining Act of 1991"?
A. DAO No. 1, Series of 1995
B. DAO No. 34, Series of 1992
C. DAO No. 76, Series of 1991
D. DAO No. 66, Series of 1991
E. DAO No. 23, Series of 1991

D. lost time accident

24. If refers to the type of accident that prevents the injured from reporting back to work on the following working day and/or thereafter.
A. accident frequency rate D. lost time accident
B. all of these E. accident severity rate
C. total accident rate

E. silica

25. Aside from limestone, what other raw materials are necessary in the production of cement?
A. diorite D. granite
B. dacite E. silica
C. andesite

C. reusing

26. Philex Mining Corp, is operating a dessiminated porphyry copper deposit at its Padcal Mine since early 1950. The mining method of this mine is:
A. small scale mining D. gophering
B. square set stoping E. blockcaving
C. reusing

C. quarry mining

27. It is a mining method used in the extraction of marble, granite, limestone, slate, etc. which are important because of physical and/or chemical properties.
A. block caving D. placer mining
B. glory holing E. solution mining
C. quarry mining

D. 2.46

28. The feed to the mill is known to contain 10% chalcopyrite. What is the % S content of the ore?
A. 1.49 D. 2.46
B. 8.49 e. 3.49
C. 4.46

B. cable belt conveyor

29. Which of the following mine haulage systems is currently being used by Philex at its Padcal Copper Mine in Benguet?
A. conventional roller type conveyor belt
B. cable belt conveyor
C. mine car tramming
D. glory hole
E. hoisting and skip

B. breast

30. Which of the following refers to the working face of an underground stope?
A. muckpile D. back
B. breast E. crown
C. pit design

A. geologic map

31. A record of geologic facts in their correct space relations is called what?
A. geologic map D. assay map
B. core log E. aerial photograph
C. pit design

C. permissible explosives

32. Which of the following explosives is recommended for blasting in underground coal mines?
A. ammonias dynamite explosives
B. slurry explosives
C. permissible explosives
D. semi-gelatin explosives
E. straight dynamite explosives

E. measured ore reserve

33. In evaluating mineral deposit, positive ore reserves are sometimes referred as what?
A. inferred ore reserve D. probable ore reserve
B. possible ore reserve E. measured ore reserve
C. geologic ore reserve

B. pit limit

34. In open pit mine design, the boundary that supports maximum allowable stripping and still results to an ore grade that guarantees breakeven condition is called:
A. bank slope D. optimum bench height
B. pit limit E. work index
C. pit slope angle

B. combined open pit and blockcaving

35. Atlas Consolidated Mining and Development Corp. in Cebu was once the fifth largest copper mine in the whole world. Which of the following mining methods were used by Atlas in mining its huge dessiminated porphyry copper deposits in Cebu?
A. room and pillar
B. combined open pit and blockcaving
C. small scale mining
D. blockcaving
E. open pit mining

D. non-lost time accident

36. Under the MGB Mine Safety Rules and Regulations, what do you call an accident wherein the injured person is able to report back to work immediately the following day after date of accident?
A. none of these D. non-lost time accident
B. high frequency rate E. high severity rate
C. lost time accident

C. 81 hectares

37. Under PD 463, mining claims were granted thru Mining Lease Contracts (MLC). This was superseded by RA 7942 where the MLC was converted either MPSA or FTAA. Under the new system, how many hectares are converted by one meridional block of an MPSA or FTAA?
A. 101 hectares D. 91 hectares
B. 61 hectares E. 71 hectares
C. 81 hectares

C. mercury

38. Which of the following exhibits an anomalous color of red?
A. copper D. chromite
B. silver E. arsenic
C. mercury

D. cut-off grade

39. The minimum economic grade of a material that can be mined by open pit at specified metal prices and predetermined operating costs is called what?
A. mine head D. cut-off grade
B. mill head E. eyeball grade
C. ore reserve grade

C. sub-level stoping

40. Which of the following underground mining methods is generally applicable to steeply dipping bedded deposits with fairly uniform grade and where the orebodies are mined in slices?
A. shrinkage stoping D. blockcaving
B. glory hole stoping E. LHD stoping
C. sub-level stoping

B. leather tanning agents

42. Which of the following is an economic final product of chemical grade chromite ores?
A. refractory bricks D. ferrochrome alloys
B. leather tanning agents E. foundry castings or dyes
C. all of the above

A. countrydrive

43. In underground development, which of the following is driven purposely to gain access to an area by by-passing certain areas of the mine of existing mine installations?
A. countrydrive D. drift
B. doghole E. tunnel
C. crosscut

D. poisson's ratio

44. One of the elastic properties of rocks is:
A. density D. poisson's ratio
B. porosity E. weight
C. specific gravity

D. 96% AN and 4% FO

45. What is the ideal mix of NFO?
A. 4% AN and 96% FO D. 96% AN and 4% FO
B. 95% AN and 5% FO E. 97% AN and 3% FO
C. 50% AN and 50% FO