Drilling and Blasting MCQs Questions & Answers | Mining Engineering Page-9 section-9

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

81.
The safe working period of BG 174 is . . . . . . . . in hard work.

A. 2 hrs

B. 4 hrs

C. 6 hrs

D. 8 hrs

Answer & Solution Discuss in Board Save for Later

82.
Boundary ventilation system is possible where the D.C and U.C shafts located at . . . . . . . . ends of property and the air from the intake and return side is practically eliminated.

A. Source

B. Opposite

C. Quarter

D. Same

Answer & Solution Discuss in Board Save for Later

83.
Which of the following statements seems to be correct in relation to detonators?

A. Detonators once inserted into cartridge can be taken out by CM

B. Detonators can be inserted at any time as per the need of Shotfirer

C. Detonators of same electrical resistance only be used

D. Detonators issued to Shotfirer shall always be less than the number of shots to be fired

Answer & Solution Discuss in Board Save for Later

84.
Lower limit of methane air mixture.

A. 3.4

B. 4.4

C. 5.4

D. 6.4

Answer & Solution Discuss in Board Save for Later

85.
The diameter of sampling pipe in fire stopping is

A. 10 mm

B. 15 mm

C. 18 mm

D. 20 mm

Answer & Solution Discuss in Board Save for Later

86.
The increase in the quantity of air due to expansion in the up cast shaft can be roughly taken as . . . . . . . .% for every 100 m depth.

A. 2%

B. 3%

C. 1%

D. 4%

Answer & Solution Discuss in Board Save for Later

87.
Main purpose of development is . . . . . . . .

A. Prospect ore body from underground for more details

B. Arrange for drainage, ventilation and transport

C. Divide mine area into convenient sections for future workings

D. Enable mine planners to decate upon the method of stoping

E. All of above

Answer & Solution Discuss in Board Save for Later

88.
The type of fan employed to improve the quantity of air in one or more districts having high resistance without increasing the total quantity of air ciculated by the main surface fan

A. Contra rotating fan

B. Axial flow

C. Booster fan

D. Centrifugal

Answer & Solution Discuss in Board Save for Later

89.
In which drivage needs skill men to drive it.

A. Incline

B. Shaft

C. Adit

D. Decline

Answer & Solution Discuss in Board Save for Later

90.
Maximum velocities of ventilating air at conveyor roads, loading points and transfer points.

A. 4 m/sec

B. 4.8 m/sec

C. 6 m/sec

D. 8 m/sec

Answer & Solution Discuss in Board Save for Later

1 2 3 4 5 6 7 8 9 10

Drilling and Blasting MCQs Questions & Answers | Mining Engineering

81. The safe working period of BG 174 is . . . . . . . . in hard work.

Answer & Solution

82. Boundary ventilation system is possible where the D.C and U.C shafts located at . . . . . . . . ends of property and the air from the intake and return side is practically eliminated.

Answer & Solution

83. Which of the following statements seems to be correct in relation to detonators?

Answer & Solution

84. Lower limit of methane air mixture.

Answer & Solution

85. The diameter of sampling pipe in fire stopping is

Answer & Solution

86. The increase in the quantity of air due to expansion in the up cast shaft can be roughly taken as . . . . . . . .% for every 100 m depth.

Answer & Solution

87. Main purpose of development is . . . . . . . .

Answer & Solution

88. The type of fan employed to improve the quantity of air in one or more districts having high resistance without increasing the total quantity of air ciculated by the main surface fan

Answer & Solution

89. In which drivage needs skill men to drive it.

Answer & Solution

90. Maximum velocities of ventilating air at conveyor roads, loading points and transfer points.

Answer & Solution

Read More Section(Drilling and Blasting)

81.
The safe working period of BG 174 is . . . . . . . . in hard work.

82.
Boundary ventilation system is possible where the D.C and U.C shafts located at . . . . . . . . ends of property and the air from the intake and return side is practically eliminated.

83.
Which of the following statements seems to be correct in relation to detonators?

84.
Lower limit of methane air mixture.

85.
The diameter of sampling pipe in fire stopping is

86.
The increase in the quantity of air due to expansion in the up cast shaft can be roughly taken as . . . . . . . .% for every 100 m depth.

87.
Main purpose of development is . . . . . . . .

88.
The type of fan employed to improve the quantity of air in one or more districts having high resistance without increasing the total quantity of air ciculated by the main surface fan

89.
In which drivage needs skill men to drive it.

90.
Maximum velocities of ventilating air at conveyor roads, loading points and transfer points.