Drilling and Blasting MCQs Questions & Answers | Mining Engineering

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81.
Creep is the error associated with

A. Fortin barometer

B. Manometer

C. Mercury barrometer

D. Aneroid barometer

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82.
Drilling in hard strata generally carried out by using drilling with

A. Electric drills

B. Steam drills

C. Compressed air drills

D. Hydraulic drills

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83.
The gears of the anemometer can be engaged or disengaged by . . . . . . . .

A. Rod

B. Bell

C. Lever

D. Clutch

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84.
Very sensitive explosive.

A. Gun powder

B. TNT

C. Ammonium Nitrate

D. NG

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85.
Working place means any place in a mine.

A. Where men are engaged to work

B. Where actual productions of work going on

C. To which any person has lawful access

D. Which is an area marked to be so on the mine plan

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86.
The inflammability of coal dust is dependent upon the percentage of . . . . . . . .

A. Volatile matter

B. Moisture

C. Age

D. CH₄

E. All of above

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87.
The axial flow fan is fitted with guide blades at the . . . . . . . . side.

A. Middle side

B. Inlet side

C. Outlet

D. Upside

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88.
Major source of heat in u/g coal mines from

A. Lights

B. Men

C. Oxidation

D. Machinery

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89.
A PETN placed booster in a shot hole occupies only . . . . . . . . of total explosive change.

A. 1 - 2%

B. 2 - 3%

C. 15 - 20%

D. 30 - 40%

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90.
The maximum height of roadway permitted by law.

A. 2 m

B. 1.8 m

C. 3 m

D. 5 m

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

81. Creep is the error associated with

Answer & Solution

82. Drilling in hard strata generally carried out by using drilling with

Answer & Solution

83. The gears of the anemometer can be engaged or disengaged by . . . . . . . .

Answer & Solution

84. Very sensitive explosive.

Answer & Solution

85. Working place means any place in a mine.

Answer & Solution

86. The inflammability of coal dust is dependent upon the percentage of . . . . . . . .

Answer & Solution

87. The axial flow fan is fitted with guide blades at the . . . . . . . . side.

Answer & Solution

88. Major source of heat in u/g coal mines from

Answer & Solution

89. A PETN placed booster in a shot hole occupies only . . . . . . . . of total explosive change.

Answer & Solution

90. The maximum height of roadway permitted by law.

Answer & Solution

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81.
Creep is the error associated with

82.
Drilling in hard strata generally carried out by using drilling with

83.
The gears of the anemometer can be engaged or disengaged by . . . . . . . .

84.
Very sensitive explosive.

85.
Working place means any place in a mine.

86.
The inflammability of coal dust is dependent upon the percentage of . . . . . . . .

87.
The axial flow fan is fitted with guide blades at the . . . . . . . . side.

88.
Major source of heat in u/g coal mines from

89.
A PETN placed booster in a shot hole occupies only . . . . . . . . of total explosive change.

90.
The maximum height of roadway permitted by law.