A. which is inherently incapable of creating spark of sufficient intensity to ignite firedamp
B. which is safe in operation as no hot gases comes out of it
C. it is operated at a lower level of temperature
D. it has an overload protection
Answer: Option A
This Question Belongs to Mining Engineering >> Introduction To Mining Engineering
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
Join The Discussion