The main advantage of drop raising is that number of workers in the lower level are . . . . . . . . except the operator of LHD.
A. Zero
B. 1
C. 2
D. 4
Answer: Option A
Related Questions on Metal Mining
A. Chip sampling
B. Channel
C. Bulk
D. Radio metre
The ore loaded in shrinkage stoping by . . . . . . . .
A. Over head mucker
B. Pneumatic Auto Loader
C. LHD
D. None
If the ore body is thicker, the level interval will be . . . . . . . .
A. More
B. Lessor
C. Stronger
D. Weaker
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