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
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For a 25 mm diameter spherical charge, the maximum allowable charge length in cm is
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Out of two basic system of leaching, if one is chemical, what is the other?
A. Physical
B. Mechanical
C. Bacterial
D. Physico-electrical
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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
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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
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Chances of 'Span failure' is maximum for
A. Wider gallery
B. Narrow gallery
C. Staggered gallery
D. Blasting gallery
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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
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Which of the following equipment is very common for over casting or side casting?
A. Shovel
B. Dozer
C. Dragline
D. Payloader
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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
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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
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Sectionalization of work in Bord and Pillar method has been stipulated in which of the following statutes?
A. CMR 116A & Circular 5/2002
B. CMR 117 & Circular 6/2002
C. CMR 137 & Circular 5/1972
D. CMR 122 & Circular 6/1972
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To open a mine for deep seated, the cut used is
A. External box cut
B. Internal box cut
C. Trench
D. Deep cut
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SIVAD unit is mainly used at Indian long wall face to operate
A. Armoured flexible conveyor and stage loader
B. Power pack
C. Shearer machine
D. All machine at long wall face
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What should be the minimum insulation resistance of high power cable?
A. 10 mega Ohm
B. 15 mega Ohm
C. 25 mega Ohm
D. 50 mega Ohm
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If the RQD of the ore and wall rock are low, the stoping method suitable is
A. Shrinkage
B. Sublevel
C. Block caving
D. Cut and fill
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In respect of every medical examination under rule 29B, the manager of the mine concerned shall give at least N days prior notice in writing to the persons to be examined. N is given by
A. 10 days
B. 15 days
C. 20 days
D. 30 days
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Dumper arrives at a shovel at a constant rate of 10 per hour. The service rate is constant at 15 per hour. At a time, the expected number of dumpers in the queue is
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In solid blasting system the maximum charge in a shot hole should not exceed
A. 150 gm
B. 250 gm
C. 335 gm
D. 565 gm
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For a shrinkage stope the following data values are given
Insitu tonnage
9000 tonne
Insitu grade
5.2 g/tonne
Average grade of waste
1.4 g/tonne
Loss of ore in the stope
10%
Dilution
20%
The grade at the mill-head in g/tonne is
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Power pack is provided at long wall face to give pressure to
A. Powered support
B. Armoured flexible conveyor
C. Double ended ranging drum shearer
D. Stage loader
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