Drilling and Blasting MCQs Questions & Answers | Mining Engineering

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81.
The MCDR are not applicable to . . . . . . . .

A. Coal and lignitemines

B. Petrolium and natural gas

C. Prescribed substance under atomic energy set

D. All the above

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82.
The coefficient of friction in smooth lined roadway . . . . . . . .

A. 0.00216

B. 0.01118

C. 0.00618

D. 0.02256

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83.
Coal dust explosions can be prevented by

A. reducing formation of dust

B. speed preventing of dust

C. render dust harmless

D. stone dust barriers and water barriers

E. All of above

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84.
These type of explosives commonly used in under ground coal mines.

A. ANFO

B. Slurry

C. Emulsion

D. Permitted

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85.
Explosives are used in mines for . . . . . . . . coal/mines.

A. Strone

B. Excavate

C. Break

D. Remove

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86.
The percentage of charcoal in gun powder.

A. 10%

B. 75%

C. 15%

D. 12%

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87.
The cotton wool in gas mask removes . . . . . . . .

A. CO₂

B. Water and CO

C. Water vapour

D. Smoke and dust

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88.
A fan circulates 6000 m³/min of air at a pressure of 20 mm of Hg. Air power in HP will be

A. 26.33

B. 26.66

C. 26.77

D. 27.11

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89.
The weight strength of blasting gelatine is . . . . . . . .

A. 80

B. 60

C. 40

D. 100

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90.
To control the fly rock the blasting technique adopted is . . . . . . . .

A. Muffled blasting

B. Pop shooting

C. Coyote blasting

D. Cushion blasting

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

81. The MCDR are not applicable to . . . . . . . .

Answer & Solution

82. The coefficient of friction in smooth lined roadway . . . . . . . .

Answer & Solution

83. Coal dust explosions can be prevented by

Answer & Solution

84. These type of explosives commonly used in under ground coal mines.

Answer & Solution

85. Explosives are used in mines for . . . . . . . . coal/mines.

Answer & Solution

86. The percentage of charcoal in gun powder.

Answer & Solution

87. The cotton wool in gas mask removes . . . . . . . .

Answer & Solution

88. A fan circulates 6000 m3/min of air at a pressure of 20 mm of Hg. Air power in HP will be

Answer & Solution

89. The weight strength of blasting gelatine is . . . . . . . .

Answer & Solution

90. To control the fly rock the blasting technique adopted is . . . . . . . .

Answer & Solution

Read More Section(Drilling and Blasting)

81.
The MCDR are not applicable to . . . . . . . .

82.
The coefficient of friction in smooth lined roadway . . . . . . . .

83.
Coal dust explosions can be prevented by

84.
These type of explosives commonly used in under ground coal mines.

85.
Explosives are used in mines for . . . . . . . . coal/mines.

86.
The percentage of charcoal in gun powder.

87.
The cotton wool in gas mask removes . . . . . . . .

88.
A fan circulates 6000 m³/min of air at a pressure of 20 mm of Hg. Air power in HP will be

89.
The weight strength of blasting gelatine is . . . . . . . .

90.
To control the fly rock the blasting technique adopted is . . . . . . . .