Drilling and Blasting MCQs Questions & Answers | Mining Engineering Page-1 section-10

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

1.
Incubation period not related to

A. Panel size

B. Seam thickness

C. Explosibility of coal dust

D. Crossing point temperature of coal

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2.
This factor do not have control over the circulation by natural ventilation.

A. Barometric pressure

B. Circulation of refigerated air

C. Emission of methane

D. Specific heat of air

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3.
During drilling, the hole gets filled with cuttings and has to be cleaned out frequently. This is done with the help of

A. derrick

B. calyx shot drilling

C. sludger

D. v-chisel

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4.
In coal mines low velocities of air dangerous in the point.

A. CO

B. Methane layering

C. Oxidation

D. All of these

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5.
In degree III mines the rate of emission of gas m³/t of coal raised is . . . . . . . .

A. Above 1

B. Above 5

C. Above 10

D. Above 20

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6.
If the deposit is at higher level than the general ground level, the access is by slightly raising roadway from grand level, known as . . . . . . . .

A. Adit

B. Decline

C. Incline

D. Pit

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7.
The type of drill rods used for coal drilling.

A. Diamond

B. Turbine

C. Cross bits

D. Tungstone

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8.
Due to evoporation of moisture in upcast shaft, the dry bulb and wet bulb temperature upcast shaft will

A. Increase

B. Remain unchanged

C. Some times increase and some time decrease

D. Decrease

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9.
Duration of BG-174 apparatus . . . . . . . . hrs.

A. 2

B. 3

C. 4

D. 6

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10.
Powdery explosives employed in

A. Water places

B. Foam places

C. Dry places

D. Dust places

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

1. Incubation period not related to

Answer & Solution

2. This factor do not have control over the circulation by natural ventilation.

Answer & Solution

3. During drilling, the hole gets filled with cuttings and has to be cleaned out frequently. This is done with the help of

Answer & Solution

4. In coal mines low velocities of air dangerous in the point.

Answer & Solution

5. In degree III mines the rate of emission of gas m3/t of coal raised is . . . . . . . .

Answer & Solution

6. If the deposit is at higher level than the general ground level, the access is by slightly raising roadway from grand level, known as . . . . . . . .

Answer & Solution

7. The type of drill rods used for coal drilling.

Answer & Solution

8. Due to evoporation of moisture in upcast shaft, the dry bulb and wet bulb temperature upcast shaft will

Answer & Solution

9. Duration of BG-174 apparatus . . . . . . . . hrs.

Answer & Solution

10. Powdery explosives employed in

Answer & Solution

Read More Section(Drilling and Blasting)

1.
Incubation period not related to

2.
This factor do not have control over the circulation by natural ventilation.

3.
During drilling, the hole gets filled with cuttings and has to be cleaned out frequently. This is done with the help of

4.
In coal mines low velocities of air dangerous in the point.

5.
In degree III mines the rate of emission of gas m³/t of coal raised is . . . . . . . .

6.
If the deposit is at higher level than the general ground level, the access is by slightly raising roadway from grand level, known as . . . . . . . .

7.
The type of drill rods used for coal drilling.

8.
Due to evoporation of moisture in upcast shaft, the dry bulb and wet bulb temperature upcast shaft will

9.
Duration of BG-174 apparatus . . . . . . . . hrs.

10.
Powdery explosives employed in