Drilling and Blasting MCQs Questions & Answers | Mining Engineering Page-7 section-8

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10

61.
Number of holes drilled in one shift of eight hours in stone face.

A. 10

B. 12

C. 15

D. 20

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62.
In fan, the air has no pre-rotation before entering the impeller this entering of air is called

A. Meridional entry

B. Non rotational entry

C. Circulation entry

D. None

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63.
The percentage of potasium nitrate present in gun powder.

A. 25%

B. 50%

C. 100%

D. 75%

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64.
The sum of kinetic energy and pressure energy called . . . . . . . .

A. Total energy

B. Velocity energy

C. Pressure difference

D. All of these

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65.
An organisation developed for petrolium export countries called . . . . . . . .

A. OPEC

B. APEF

C. CIPPEL

D. ODEN

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66.
The Nationalisation of coal industry was done on . . . . . . . .

A. 16^th October, 1971

B. 1^st May, 1972

C. 30^th June, 1973

D. 1^st November, 1975

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67.
Underground coal mines are in principle ventilated by exausting system, so that

A. Cool and fresh intake air can enter u/g

B. Build-up methane concentration decreased

C. Spontanious heating risk reduced

D. Fumes fastly removed in case of fire

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68.
Gas mask bottom most layer consist of

A. Hopacolite

B. Silica gel

C. Caustite

D. Charcoal

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69.
Though the charging, firing of shots in opencast working is not permitted within the danger zone but still it is permitted under the CMR 2017 only if which of the following is maintained?

A. The Blaster/Shotfirer shall ensure that all persons have taken proper shelter within the danger zone

B. Sufficient warning is given over the entire area

C. Both A and B

D. It is not permitted under any circumstances

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70.
Carbide lamps can with stand air velocity of

A. 2 m/sec

B. 5 m/sec

C. 8 m/sec

D. 12 m/sec

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

61. Number of holes drilled in one shift of eight hours in stone face.

Answer & Solution

62. In fan, the air has no pre-rotation before entering the impeller this entering of air is called

Answer & Solution

63. The percentage of potasium nitrate present in gun powder.

Answer & Solution

64. The sum of kinetic energy and pressure energy called . . . . . . . .

Answer & Solution

65. An organisation developed for petrolium export countries called . . . . . . . .

Answer & Solution

66. The Nationalisation of coal industry was done on . . . . . . . .

Answer & Solution

67. Underground coal mines are in principle ventilated by exausting system, so that

Answer & Solution

68. Gas mask bottom most layer consist of

Answer & Solution

69. Though the charging, firing of shots in opencast working is not permitted within the danger zone but still it is permitted under the CMR 2017 only if which of the following is maintained?

Answer & Solution

70. Carbide lamps can with stand air velocity of

Answer & Solution

Read More Section(Drilling and Blasting)

61.
Number of holes drilled in one shift of eight hours in stone face.

62.
In fan, the air has no pre-rotation before entering the impeller this entering of air is called

63.
The percentage of potasium nitrate present in gun powder.

64.
The sum of kinetic energy and pressure energy called . . . . . . . .

65.
An organisation developed for petrolium export countries called . . . . . . . .

66.
The Nationalisation of coal industry was done on . . . . . . . .

67.
Underground coal mines are in principle ventilated by exausting system, so that

68.
Gas mask bottom most layer consist of

69.
Though the charging, firing of shots in opencast working is not permitted within the danger zone but still it is permitted under the CMR 2017 only if which of the following is maintained?

70.
Carbide lamps can with stand air velocity of