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-10 section-4

The quantity of air to be circulated by an auxiliary fan depends upon the . . . . . . . .

A) Rate of gas emission in the drift B) Temperature in the drift C) R.H in the drift D) None

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Answer & Solution

Answer: Option A

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Whirling hygrometer is rotated at a speed of . . . . . . . .

A) 100 rpm B) 200 rpm C) 300 rpm D) 400 rpm

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Answer & Solution

Answer: Option B

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Air velocities in conveyor roads and loading points . . . . . . . . m/sec.

A) 0.5 B) 2 C) 3 D) 4.5

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Answer: Option C

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There is a possibility of explosion within . . . . . . . . hours of sealing of III degree gassy mine.

A) 12 - 24 B) 20 - 24 C) 24 - 48 D) 48 - 52

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Answer: Option C

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Proto mark IV apparatus is designed for . . . . . . . . use.

A) 1 hour B) 2 hours C) 3 hours D) 4 hours

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Answer: Option B

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The minimum pillar to pillar distance, if the depth of seam is 250 m and gallery width is 4.2 m.

A) 34 m B) 30 m C) 39 m D) 45 m

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Answer: Option C

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The resistance in parallel road ways given by formula $$\frac{1}{{\sqrt R }}$$

A) $${R_1} - {R_2} - {R_3}.\,.\,.\,.\,.\,{R_n}$$ B) $$\frac{1}{{{R_1}}} + \frac{1}{{{R_2}}} + \frac{1}{{{R_3}}}.\,.\,.\,.\,.\,\frac{1}{{{R_n}}}$$ C) $$\frac{1}{{\sqrt {{R_1}} }} + \frac{1}{{\sqrt {{R_2}} }} + \frac{1}{{\sqrt {{R_3}} }}.\,.\,.\,.\,.\,\frac{1}{{\sqrt {{R_n}} }}$$ D) $$\frac{1}{{\sqrt {{R_1}} }} - \frac{1}{{\sqrt {{R_2}} }} - \frac{1}{{\sqrt {{R_3}} }}.\,.\,.\,.\,.\, - \frac{1}{{\sqrt {{R_n}} }}$$

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Answer: Option C

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Shattering effect produced by using . . . . . . . .

A) Low explosive B) High explosive C) High VOD D) All of these

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Answer: Option B

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The simplest and effective method which can be used during emergency, the rescure blows air forcebly into mouth of patient . . . . . . . .

A) Mouth to mouth B) Schefe's method C) Sylvester's method D) All of these

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Answer: Option A

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100

The overall efficiency (or) useful effect . . . . . . . .

A) $$\frac{{{\text{HP of ventilation}}}}{{{\text{HP input to engine}}}}$$ B) $$\frac{{{\text{HP of ventilation}}}}{{{\text{Fan Shaft HP}}}}$$ C) $$\frac{{{\text{Brake HP}}}}{{{\text{Air HP}}}}$$ D) None

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Answer & Solution

Answer: Option A

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