Drilling and Blasting MCQs Questions & Answers | Mining Engineering

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91.
In this stage of self heating, the petrol like odour comes.

A. Initial

B. Secondary

C. Final

D. All of these

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92.
The gas which accumulates at the roof level below the fire stopping is

A. CH₄

B. CO

C. CO₂

D. N₂

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93.
Which is the deepest under ground coal mine in India.

A. JK3

B. Clunakuri Coal Mine

C. Jharia Coal Mine

D. Moonidih Coal Mine

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94.
The amount of stone dust deposited in the each shell of light weight barrier.

A. 50 kg

B. 75 kg

C. 100 kg

D. 125 kg

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95.
P - V curve showing the relationship between fan drift w.g and . . . . . . . .

A. Volume of air flowing into the mine given by equivalent orifice

B. Volume of air flowing in return air way

C. Volume of air flowing in only one district

D. All of these

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96.
The presence in the air of fine dry coal dust lower the lower limit of explosibility of methane air mixture to well below the usual . . . . . . . .%.

A. 1

B. 2

C. 4

D. 5

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97.
If the fire involves inflammable liquids comes under

A. Class A fire

B. Class B fire

C. Class C fire

D. Class E fire

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98.
Amount of explosive to be charged in a single shot hole is not dependent on

A. nature of rock to be broken

B. hole depth

C. dia of hole

D. quality of detonating fuse

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99.
Explosives grouped in . . . . . . . . types depending upon the speed which explosive effects produced.

A. 2

B. 3

C. 4

D. 5

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100.
The rescue apparatus smoke helmet (or) hose mask for use at a place of irrespirable air, which is not far from an area of fresh air, upto about . . . . . . . .m.

A. 25

B. 30

C. 40

D. 50

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

91. In this stage of self heating, the petrol like odour comes.

Answer & Solution

92. The gas which accumulates at the roof level below the fire stopping is

Answer & Solution

93. Which is the deepest under ground coal mine in India.

Answer & Solution

94. The amount of stone dust deposited in the each shell of light weight barrier.

Answer & Solution

95. P - V curve showing the relationship between fan drift w.g and . . . . . . . .

Answer & Solution

96. The presence in the air of fine dry coal dust lower the lower limit of explosibility of methane air mixture to well below the usual . . . . . . . .%.

Answer & Solution

97. If the fire involves inflammable liquids comes under

Answer & Solution

98. Amount of explosive to be charged in a single shot hole is not dependent on

Answer & Solution

99. Explosives grouped in . . . . . . . . types depending upon the speed which explosive effects produced.

Answer & Solution

100. The rescue apparatus smoke helmet (or) hose mask for use at a place of irrespirable air, which is not far from an area of fresh air, upto about . . . . . . . .m.

Answer & Solution

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91.
In this stage of self heating, the petrol like odour comes.

92.
The gas which accumulates at the roof level below the fire stopping is

93.
Which is the deepest under ground coal mine in India.

94.
The amount of stone dust deposited in the each shell of light weight barrier.

95.
P - V curve showing the relationship between fan drift w.g and . . . . . . . .

96.
The presence in the air of fine dry coal dust lower the lower limit of explosibility of methane air mixture to well below the usual . . . . . . . .%.

97.
If the fire involves inflammable liquids comes under

98.
Amount of explosive to be charged in a single shot hole is not dependent on

99.
Explosives grouped in . . . . . . . . types depending upon the speed which explosive effects produced.

100.
The rescue apparatus smoke helmet (or) hose mask for use at a place of irrespirable air, which is not far from an area of fresh air, upto about . . . . . . . .m.