P-5 explosives are used for
A. pre-cut blasting
B. solid blasting
C. open cast blasting
D. over burden blasting
Answer: Option B
A. pre-cut blasting
B. solid blasting
C. open cast blasting
D. over burden blasting
Answer: Option B
A. Normal distribution
B. Skewed distribution
C. Lognormal distribution
D. Poisson distribution
A. 3 level heading district
B. 4 level heading district
C. 5 level heading district
D. 6 level heading district
It is very difficult to control shaley roof if coal is not left with the shale why?
A. It is weak in nature
B. It has weathering effect
C. It has great affinity to absorb moisture and get departed from immediate roof
D. It reacts with coaly surface
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