41
Given the following,
Machine Component
P. Dint header
1. Cowl
Q. Coal plough
2. Cutting chain
R. Road header
3. Loading apron
S. Shearer
4. Static set of bits
The correct match is
A)
P-4,Q-2, R-3, S-1
B)
P-3, Q-4, R-2, S-1
C)
P-2, Q-3, R-4, S-1
D)
P-2, Q-4, R-3, S-1
Answer & Solution
Answer: Option
D
42
For a 25 mm diameter spherical charge, the maximum allowable charge length in cm is
A)
15
B)
25
C)
30
D)
150
Answer & Solution
Answer: Option
D
43
Out of two basic system of leaching, if one is chemical, what is the other?
A)
Physical
B)
Mechanical
C)
Bacterial
D)
Physico-electrical
Answer & Solution
Answer: Option
C
44
The basic constituents of an emulsion explosive consist of oxidizers, fuels and surfactant with weight percentages of X, Y, Z respectively. Identify the correct relationship from the followings
A)
X > Y > Z
B)
Y > X > Z
C)
Y > Z > X
D)
X > Z > Y
Answer & Solution
Answer: Option
D
45
In longwall mining subsidence phenomenon, the "angle of break" is the angle between
A)
The vertical line at the panel edge and line connecting the panel edge and zero subsidence on the surface
B)
The vertical line at the panel edge and line connecting the panel edge and point of critical deformation on the surface
C)
The vertical line at the panel edge and line connecting the panel edge and point of the maximum tensile strain on the surface
D)
The horizontal line and the line connecting the panel edge and zero subsidence on the surface
Answer & Solution
Answer: Option
A
46
Chances of 'Span failure' is maximum for
A)
Wider gallery
B)
Narrow gallery
C)
Staggered gallery
D)
Blasting gallery
Answer & Solution
Answer: Option
A
47
The layout of the pipelines for hydraulic stowing should be such that the hydraulic profile
A)
Is above the geometric profile
B)
Is below the geometric profile
C)
Is on the geometric profile
D)
There is no relation with the geometric profile
Answer & Solution
Answer: Option
A
48
Which of the following equipment is very common for over casting or side casting?
A)
Shovel
B)
Dozer
C)
Dragline
D)
Payloader
Answer & Solution
Answer: Option
C
49
Depending on the decreasing ability of surrounding rock to store strain energy, the underground metal mining methods can be ordered as
A)
Cut-and-fill stoping, Sublevel caving, Sublevel open stoping, Block caving
B)
Sublevel open stoping, Cut-and-fill stoping, Sublevel caving, Block caving
C)
Sublevel caving, Sublevel open stoping, Cut-and-fill stoping, Block caving
D)
Block caving, Sublevel caving, Sublevel open stoping, Cut-and-fill stoping
Answer & Solution
Answer: Option
B
50
Why outlets from a mine are not provided closer than 13.5m?
A)
For quicker intercommunication
B)
For easier pit top arrangement
C)
Closer outlets will weaken the shaft pillar causing possibility of leakage
D)
There may be possibility of subsidence
Answer & Solution
Answer: Option
C
