Introduction to Mining Engineering MCQs Questions & Answers

41

What is the standard of lighting at pit bottom of Indian mines?

A) 0.4 lumen/ft² B) 1.25 lumen/ft² C) 2 lumen/ft² D) 3 lumen/ft²

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Answer & Solution

Answer: Option D

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42

The ground in central portion of the subsidence trough is subjected to

A) lateral tension B) vertical compression C) lateral compression D) none of the above

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Answer & Solution

Answer: Option A

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43

V.C.R is a modified version of

A) sub-level B) cut & fill C) block caving D) stope & pillar

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Answer & Solution

Answer: Option A

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44

A surface miner with 2.0 m cutting drum width excavates coal in windrowing mode from a bench with effective face length 200 m. The cutting speed of the surface miner is 10 m/min and the cutting depth 25 cm. The density of coal is 1.4 tonne/m³. If the average turning time of the machine at the face end is 5 min, the rate of production in tonne/hour becomes

A) 320 B) 350 C) 360 D) 380

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Answer & Solution

Answer: Option B

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45

The Draw point spacing in caving method is dependent on

A) mechanisation used B) length of the stope C) area of influence of the draw points D) size of the ore broken

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Answer & Solution

Answer: Option D

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46

Water spraying at coalface before & after short firing is mandatory, why so?

A) in order to guard against the explosion hazard of coal dust B) to prevent the formation of coal dust cloud C) both of them D) none of them

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Answer & Solution

Answer: Option A

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47

In which of the following thick seam mining method, roof sag and initiation of spon heating is maximum seen?

A) descending slicing B) ascending slicing C) mixed order of slicing D) under winning integral method

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Answer & Solution

Answer: Option B

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48

Best suited mining method for thick vein/massive deposit with strong ore, strong walls and steep dip is

A) open stope B) cut and fill C) shrinkage stope D) block caving

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Answer & Solution

Answer: Option C

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49

Which of the following hazards is met when the roof exposure during depillaring operation becomes more than 90 m²

A) coal bump B) air blast C) subsidence D) explosion

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Answer & Solution

Answer: Option B

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50

When a double ended ranging drum shearer cuts coal in a longwall face,

A) both the drums rotate in the same direction keeping the front drum up and the rear drum down B) both the drums rotate in the opposite direction keeping the front drum up and the rear drum down C) both the drums rotate in the opposite direction keeping the front drum down and the rear drum up D) both the drums rotate in the same direction keeping the front drum down and the rear drum up

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Answer & Solution

Answer: Option B

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Introduction to Mining Engineering MCQs Questions & Answers | Mining Engineering