Dumper arrives at a shovel at constant rate of 10 per hour. The service rate is constant at 15 per hour, At a time, the expected number of dumper in the que is
A. 5
B. 4
C. 3
D. 2
Answer: Option D
Related Questions on Opencast Mining
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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