Which is the modification of dipper shovel with a long boom and used for casting fragmented rock or earth into a dump of over burden.
A. Tractor shovel
B. Stripper shovel
C. Hydraulic shovel
D. Bucket wheel excavator
Answer: Option B
A. Tractor shovel
B. Stripper shovel
C. Hydraulic shovel
D. Bucket wheel excavator
Answer: Option B
Which test determines the sensitivity of explosive to shock and impact.
A. Rifle bullet test
B. Gap test
C. Ageing test
D. Water resistance test
The mining method which does not distroy the land for agriculture and residential purposes.
A. Striping
B. Open cast
C. Placer
D. Long wall
The output capacity of a drag line with 23 to 30m3 is million cu.m per year is
A. 0.25 to 0.75
B. 3 to 4.5
C. 1.5 to 1.7
D. None
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