The equation applicable to pressure loss in laminar flow of fluid . . . . . . . .
A. Strokes law
B. Poiseville equation
C. Bromilow's formula
D. Bernoulli equation
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The wire rope factory receives from rolling mills coils of steel rods of . . . . . . . . diameter formed from steel ingots by repeated hot rolling.
A. 2 - 5 mm
B. 12 - 15 mm
C. 18 - 25 mm
D. 6 - 13 mm
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Oremerod detaching hook consists of . . . . . . . . plates.
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The number of impellers on the pump shaft does not exceed . . . . . . . . in order to prevent bending and reducing the length.
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The angle between the vertical plane of the winding sheare and the rope when the cage is pit top or pit bottom called . . . . . . . .
A. Angle of repose
B. Critical angle
C. Subcritical angle
D. Angle of fleet
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In deep shaft, if drum winder used, it may be necessary to consider double layer coiling rope in order to accommodate all the rope on the drum and the fleet angle limited to . . . . . . . .
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The haulage arrangement that operates between the working face and main loading points called . . . . . . . .
A. Gathering haulage
B. Main haulage
C. Face haulage
D. None
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The ratio between load to effort is called . . . . . . . .
A. Theoretical Advantage
B. Volumetric Advantage
C. Mechanical Advantage
D. Efficiency
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If the wire rope is coated with molten zinc called as . . . . . . . .
A. Stelorised
B. Steel coated
C. Galvonized
D. Tempared
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Steel rigid guides made of . . . . . . . .
A. T - section rails
B. H - section rails
C. Rails of old steel arches
D. All of these
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The cores used in a wire rope are . . . . . . . .
A. Fibre core
B. Steel strand core
C. Independent wire rope core
D. All of these
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The guides are fixed by counter sunk bolts to the buttons placed across the shafts at intervals of . . . . . . . .
A. 0.5 - 1 m
B. 1.2 - 1.5 m
C. 1.8 - 3 m
D. 3.2 - 4 m
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Number of cage chains in case of single cage . . . . . . . .
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The clip which is tightened on the rope by handle and screw, the handless coupled to draw bar of the tub by long steel rod hinged to top called . . . . . . . .
A. Screw clip
B. Small man clip
C. Cam clip
D. Lashing chain
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The output power of the motor which has two poles in coal drill is . . . . . . . .
A. 0.5 kw
B. 0.8 kw
C. 1 kw
D. 1.25 kw
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In dragline (24/96), the power source is . . . . . . . .
A. Battery
B. Compressed air
C. Electricity Max Voltage 6.6 KV AC
D. Electricity Max Voltage 1.1 KV AC
Select an option to see the answer and solution.
The wear resistance of the rope increased by using . . . . . . . .
A. Equal lay
B. Ordinary lay
C. Langs lay
D. Right hand lay
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Regular lay also called as . . . . . . . .
A. Left hand lay
B. Right hand lay
C. Langs lay
D. Ordinary lay
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The number of drums provided in double drum balanced haulage . . . . . . . .
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What type of ventilation is recommended for SDL/LHD.
A. 1 m3 /min/KW of motor power
B. 5 m3 /min/KW of motor power
C. 10 m3 /min/KW motor power
D. 15 m3 /min/KW of motor power
Select an option to see the answer and solution.