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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-2 section-7

Each section contains 100 MCQs on Drilling and Blasting .
11
The percentage of recovery in BG method is . . . . . . . .
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
12
Inflammability of coal dust increase almost . . . . . . . . proportional to the percentage of fire damp present in atmosphere.
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
13
What do you mean by mechanical efficiency of a fan.
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Answer & Solution
Answer: Option D
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14
It involves the measurement of air velocity and quantity of air flowing in various parts of the mine called . . . . . . . .
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Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
15
A roadway driven in coal seam called . . . . . . . .
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Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board
16
Incubation period of coal is judged by . . . . . . . .
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Answer & Solution
Answer: Option A
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17
Ammonium nitrate is comes under
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
18
No drill shall be used for boring a shot hole unless it allows a clearance of at least "A" em over the diameter of the explosive cartridge. A is given
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Answer & Solution
Answer: Option D
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19
The minimum pillar to pillar distance of the depth of the seam is 150 m and gallery width is 3.6 m.
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Answer & Solution
Answer: Option B
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20
Meen air temperature of a 450 m deep down cast shaft is 29°C and that of the up cast shaft is 37°C, the height of the motion column m is . . . . . . . .
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Answer & Solution
Answer: Option C
No explanation is given for this question. Let's Discuss on Board