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-6 section-7

The samples should be taken behind the sealed of area when the barometric pressure is . . . . . . . .

A) High B) Medium C) Medium D) Low

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Answer & Solution

Answer: Option D

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Explosive is solid/liquid/mixture of substances which change themselves instantaiously in to large volume of gases at high temperature and pressure when . . . . . . . . applied to it.

A) Detonation B) Deflection C) Wave D) Burning

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Answer: Option A

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The primary or forward shockwave precedes the flames of explosion which consumes all . . . . . . . . of the air.

A) CO₂ B) H₂ C) N₂ D) O₂

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Answer: Option D

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Forcing fan requires air lock at . . . . . . . . shaft.

A) Upcast B) DC shaft C) Air shaft D) Middle

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Answer & Solution

Answer: Option B

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The formula for calculating lower limit of explosibility of gas mixture [X] = ?

A) $$\left[ {\frac{{100}}{{\frac{{{P_1}}}{{{N_1}}} - \frac{{{P_2}}}{{{N_2}}} - \frac{{{P_3}}}{{{N_3}}}}}} \right]\% $$ B) $$\left[ {\frac{{100}}{{\frac{{{P_1}}}{{{N_1}}} + \frac{{{P_2}}}{{{N_2}}} + \frac{{{P_3}}}{{{N_3}}}}}} \right]\% $$ C) $$\left[ {\frac{{100}}{{\frac{{{N_1}}}{{{P_1}}} - \frac{{{N_2}}}{{{P_2}}} - \frac{{{N_3}}}{{{P_3}}}}}} \right]\% $$ D) $$\left[ {\frac{{100}}{{\frac{{{P_1}}}{{{N_1}}} + \frac{{{N_2}}}{{{P_2}}} + \frac{{{N_3}}}{{{P_3}}}}}} \right]\% $$

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Answer & Solution

Answer: Option B

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Width wise, the sampling pipe should be placed . . . . . . . . of the stopping.

A) Side B) Middle C) Bottom D) All of these

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Answer: Option B

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In more dumping space facility the tippler used is . . . . . . . .

A) Runing tippler B) Travelling tippler C) Siding tippler D) Turning tippler

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Answer & Solution

Answer: Option B

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It is the measure of the amount of energy released by an explosive during blasting and ability to do work.

A) VOD B) Density C) Strength D) Sensitivety

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Answer & Solution

Answer: Option C

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The equivalent resistance of 3 similar roadway of 0.09 N sec²m^-8, resistance each connected in parallel is

A) 0.27 N sec²m^-8 B) 0.03 N sec²m^-8 C) 0.0033 N sec²m^-8 D) 0.01 N sec²m^-8

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Answer: Option D

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The reverse wave (or) secondary wave which is smaller face than . . . . . . . . wave.

A) Primary B) Backlash C) Shock D) All of these

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Answer & Solution

Answer: Option A

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