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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Drilling and Blasting. These resources are available for mining engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Drilling and Blasting chapter is particularly important for students studying mining engineering. Page-8 section-2

Each section contains 100 MCQs on Drilling and Blasting .
71
In sinking shaft drilling is done by
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Answer & Solution
Answer: Option A
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72
The coal dust, when suspended in air, is capable of bursting into . . . . . . . . explosion and propagate it.
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Answer: Option C
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73
Rate of penetration of compressed air drills varies from . . . . . . . . in hard rocks in m/min.
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Answer: Option B
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74
Once the coal dust explosion starts, its propagation needs very small quantity of dust, only 1 gram per c.c of space which is equal to thickness of a layer of ordinary thick paper over a periphery of . . . . . . . .m road way.
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Answer & Solution
Answer: Option B
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75
An evasee is used in exhaustive ventilation is
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Answer: Option C
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76
In reversal of air screw fan the quantity of air reduce to nearly . . . . . . . . on reversal.
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Answer: Option D
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77
Which drivage is ideal for trackless mining.
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Answer: Option B
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78
Over burden heaps should be atleast . . . . . . . .m away from the coal face of a quarry.
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Answer: Option B
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79
The weight of soidum phosphate is . . . . . . . .
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Answer: Option D
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80
Fire involves live electrical equipment comes under
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Answer: Option A
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