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21
In this method the blast holes drilled in horizontal direction.
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Answer: Option A
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22
Which metal is currently mined from ocean floor.
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Answer: Option D
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23
MMR can be implimented in the oil mines.
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Answer: Option B
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24
Arrange the decreasing order in respect of degree of filling.
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Answer: Option A
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25
The method of raising with the help of Alimak raise climber was introduced in . . . . . . . . year.
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Answer: Option B
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26
Two or three compartmental raising is adopted for . . . . . . . . raises.
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Answer: Option A
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27
What materials are mined by using placer mining.
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Answer: Option C
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28
The primary purpose of cut holes for blasting in an underground drivage is to
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Answer: Option A
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29
Transportation of sand in a pipe line flow is . . . . . . . .
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Answer: Option C
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30
The commonly used method for sample-reduction to suitable size . . . . . . . .
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Answer: Option A
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