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81
The amount of margin . . . . . . . . in meters allows a cage to be lifted for materials to be slung beneath it.
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Answer: Option B
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82
One of the Loco haulage is . . . . . . . .
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Answer: Option D
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83
Electric drills commonly used for . . . . . . . .
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Answer: Option D
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84
The drill manufactured by Atlas Copco Ltd. under the trade name of . . . . . . . .
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Answer: Option D
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85
Jack hammer drill used for vertically downward drilling upto a depth of . . . . . . . . m.
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Answer: Option D
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86
If any break down take place in endless haulage, the whole system comes to . . . . . . . .
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Answer: Option B
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87
The wire ropes required to be used in wet shafts are . . . . . . . .
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Answer: Option C
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88
The cutter loader machines work on gradients upto . . . . . . . . degress.
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Answer: Option C
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89
The shearer cuts the coal and loads into . . . . . . . .
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Answer: Option B
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90
In coal plough machine, the following component is employed.
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Answer: Option D
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