Drilling and Blasting MCQs Questions & Answers | Mining Engineering

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31.
If the fire is small, dire is dealt with, involves combustable material.

A. Quenching with water

B. Sealing

C. Flooding

D. All of these

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32.
The bearing capacity of pillar is maximum for . . . . . . . .

A. Square

B. Rectangular

C. Circular

D. Elliptical

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33.
Where the skip winding adopted the shaft should be sunk deeper by minimum of . . . . . . . . meter below the underground decking level, depending mainly upon the height of skip.

A. 2

B. 4

C. 6

D. 8

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34.
. . . . . . . . type of fan prefer to install fan in less space at surface.

A. Air screw

B. Centrifugal

C. Booster

D. Contrarotating

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35.
The presence of . . . . . . . .% Hydrogen in methane eliminates the delay completely.

A. 10

B. 20

C. 30

D. 40

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36.
CO/O₂ deficiency ratio in coal mines in extream cases only it may be upto . . . . . . . .

A. 0.3%

B. 0.5%

C. 0.8%

D. 1%

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37.
The raising capacity of mine depends on . . . . . . . .

A. Shaft depth

B. Shaft size

C. Shaft capacity

D. Shaft head gear structure

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38.
Sraper bucket capacity

A. 0 - 0.4 m³

B. 0.5 - 1.5 m³

C. 2 - 2.5 m³

D. 2.6 - 3 m³

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39.
Ventilation stoppings made of . . . . . . . .

A. Glass

B. lncornbustable material

C. Combustable material

D. Wood

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40.
Specific gravity of Nitroglycerene.

A. 1

B. 1.2

C. 1.6

D. 1.8

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

31. If the fire is small, dire is dealt with, involves combustable material.

Answer & Solution

32. The bearing capacity of pillar is maximum for . . . . . . . .

Answer & Solution

33. Where the skip winding adopted the shaft should be sunk deeper by minimum of . . . . . . . . meter below the underground decking level, depending mainly upon the height of skip.

Answer & Solution

34. . . . . . . . . type of fan prefer to install fan in less space at surface.

Answer & Solution

35. The presence of . . . . . . . .% Hydrogen in methane eliminates the delay completely.

Answer & Solution

36. CO/O2 deficiency ratio in coal mines in extream cases only it may be upto . . . . . . . .

Answer & Solution

37. The raising capacity of mine depends on . . . . . . . .

Answer & Solution

38. Sraper bucket capacity

Answer & Solution

39. Ventilation stoppings made of . . . . . . . .

Answer & Solution

40. Specific gravity of Nitroglycerene.

Answer & Solution

Read More Section(Drilling and Blasting)

31.
If the fire is small, dire is dealt with, involves combustable material.

32.
The bearing capacity of pillar is maximum for . . . . . . . .

33.
Where the skip winding adopted the shaft should be sunk deeper by minimum of . . . . . . . . meter below the underground decking level, depending mainly upon the height of skip.

34.
. . . . . . . . type of fan prefer to install fan in less space at surface.

35.
The presence of . . . . . . . .% Hydrogen in methane eliminates the delay completely.

36.
CO/O₂ deficiency ratio in coal mines in extream cases only it may be upto . . . . . . . .

37.
The raising capacity of mine depends on . . . . . . . .

38.
Sraper bucket capacity

39.
Ventilation stoppings made of . . . . . . . .

40.
Specific gravity of Nitroglycerene.