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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-9 section-9

Each section contains 100 MCQs on Drilling and Blasting .
81
The safe working period of BG 174 is . . . . . . . . in hard work.
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Answer & Solution
Answer: Option B
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82
Boundary ventilation system is possible where the D.C and U.C shafts located at . . . . . . . . ends of property and the air from the intake and return side is practically eliminated.
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Answer & Solution
Answer: Option B
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83
Which of the following statements seems to be correct in relation to detonators?
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Answer & Solution
Answer: Option C
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84
Lower limit of methane air mixture.
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Answer & Solution
Answer: Option C
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85
The diameter of sampling pipe in fire stopping is
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Answer & Solution
Answer: Option C
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86
The increase in the quantity of air due to expansion in the up cast shaft can be roughly taken as . . . . . . . .% for every 100 m depth.
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Answer & Solution
Answer: Option C
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87
Main purpose of development is . . . . . . . .
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Answer & Solution
Answer: Option E
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88
The type of fan employed to improve the quantity of air in one or more districts having high resistance without increasing the total quantity of air ciculated by the main surface fan
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Answer & Solution
Answer: Option C
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89
In which drivage needs skill men to drive it.
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Answer & Solution
Answer: Option B
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90
Maximum velocities of ventilating air at conveyor roads, loading points and transfer points.
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Answer & Solution
Answer: Option A
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