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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-5 section-1

Each section contains 100 MCQs on Drilling and Blasting .
41
A person inhales . . . . . . . . 1/min, the O2 consumption . . . . . . . . 1/min, when doing hard work in pauses.
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
42
If the patient needs more than 30 1/min., draws additional air through the . . . . . . . . value on the mask, in reviving apparatus.
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Answer & Solution
Answer: Option D
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43
Laboratory experiments proved, suddenly comprising gas air mixture of containing as low as . . . . . . . . % and as high as . . . . . . . . % firedamp can be ignited and made explosive both the temp. and pressure raised simultaniously.
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Answer & Solution
Answer: Option A
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44
In very thick seams the thickness of coal is . . . . . . . .
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Answer & Solution
Answer: Option D
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45
The pressure of forcing fan has effect of keeping the gases in . . . . . . . .
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Answer & Solution
Answer: Option B
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46
For introduction of solid blasting need apporval from DGMS for exemption under following regulation.
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Answer & Solution
Answer: Option D
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47
Water infusion is one of the method of prevention of dust at the faces.
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Answer & Solution
Answer: Option B
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48
When coal dust propagates explosion . . . . . . . . as in case of gas explosion.
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Answer & Solution
Answer: Option D
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49
Coal more liable to spontanious heating when thesebands present
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Answer & Solution
Answer: Option A
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50
If the $$\frac{{CO}}{{{O_2}}}$$ deficiency ratio is 3% or more it indicates . . . . . . .
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Answer & Solution
Answer: Option D
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