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Coal Mining MCQs Questions & Answers | Mining Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Coal Mining. These resources are available for mining engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Coal Mining chapter is particularly important for students studying mining engineering. Page-3 section-2

Each section contains 100 MCQs on Coal Mining .
21
In blast stower; the drum driven at a speed.
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Answer & Solution
Answer: Option C
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22
Optimum length of face for the consideration of the capacity of the face, machinery is determined on the basis of
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Answer & Solution
Answer: Option A
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23
It is international amociation which maintain drilling standards
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Answer: Option B
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24
Special methods of shaft sinking mainly classified in to . . . . . . . . types.
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Answer: Option C
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25
poH Broche process called
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Answer: Option B
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26
The stowing rate in mechanical sand stowing
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Answer: Option A
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27
Feed mechanism is not necessary beyond the depth of . . . . . . . . m.
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Answer: Option D
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28
Forced drop shaft method employed in
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Answer & Solution
Answer: Option C
Solution:
Forced drop shaft method (also known as caisson sinking) is mainly used in conditions where there is heavy inflow of water into the shaft.

In such strata, conventional shaft sinking becomes unsafe because continuous water ingress can collapse the sides and interrupt excavation.

The method uses a heavy, watertight caisson that is gradually forced downward by its own weight while excavation proceeds inside it, ensuring stability and control over water entry.

Although it can pass through bands of loose and tough strata, that is not the primary reason for its use.

The most critical and defining condition for employing this method is heavy inrush of water, making Option C the correct answer.
29
Drivage of two sets of roads and forming the pillar called . . . . . . . .
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Answer: Option B
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30
As a thumb rule the number of holes in a ring is . . . . . . . . times the diameter of ring in meters
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Answer & Solution
Answer: Option B
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