Drilling and Blasting MCQs Questions & Answers

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-1 section-9

Main ingradient of the chemical used in dry powder type extinguisher.

A) Mono ammonium phosphate B) Antisetting agent C) LMNR D) All of these

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Answer & Solution

Answer: Option A

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Find the empirical relation between depth of hole (h) and gas content (V), A and B are constants

A) $${\text{V}} = {\text{A}} \times {\text{B}} \times {\text{h}}$$ B) $${\text{V}} = \frac{{{\text{AB}}}}{{\text{h}}}$$ C) $${\text{V}} = \frac{{{\text{Ah}}}}{{1 + {\text{Bh}}}}$$ D) $${\text{V}} = \frac{{{\text{Bh}}}}{{1 + {\text{Ah}}}}$$

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Answer & Solution

Answer: Option B

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Modern flame safety lamp can with stand an air velocity of . . . . . . . . m/sec.

A) 5 B) 10 C) 15 D) 17

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Answer: Option C

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What happens, if the booster fan is placed too far out bye of the neutral line.

A) The pressure difference between intake and return increases B) Excessive leakage C) Recirculation occur D) None

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Answer & Solution

Answer: Option A

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If CO/O₂ deficiency ratio is 2% it indicates . . . . . . . .

A) No heating B) Approaching active fire C) More active fire D) None

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Answer & Solution

Answer: Option B

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Staple pit also called as . . . . . . . .

A) Secondary shaft B) Blind heading incline C) Auxilary shaft D) Long shaft

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Answer & Solution

Answer: Option A

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Air crossings constructed where intake and return air . . . . . . . .

A) Meetslow B) Passes C) Flows flower D) Crosses

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Answer & Solution

Answer: Option D

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The air tubes normally available in lengths of . . . . . . . . in meters.

A) 8 or 16 B) 6 or 10 C) 2 or 7 D) 10 or 18

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Answer & Solution

Answer: Option A

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The ventilation system is adopted for continuous miner headings.

A) Dust less auxiliary ventilation B) Overlap system of ventilation C) Exaust type ventilation D) Forcing type ventilation

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Answer & Solution

Answer: Option B

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To prevent recirculation of air, the quantity of air taken by the auxiliary fan not exceed the quantity of air current from which the air passing through the fan is drawn.

A) $$\frac{1}{3}$$ B) $$\frac{3}{4}$$ C) $$\frac{2}{3}$$ D) $$\frac{1}{2}$$

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Answer & Solution

Answer: Option D

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