Drilling And Blasting - Study Mode
[#331] What is the range of heat produced due to oxidation of coal.
Correct Answer
(D) 8.79 MJm -3
[#332] Air samples from behind stopping should be between the hours . . . . . . . .
Correct Answer
(B) 12 - 2 PM
[#333] Explosions in coal mines are
Correct Answer
(D) All of these
[#334] In the mine is running under medium resistance series and parallel fans arrangement gives the same results in the region of about . . . . . . . . % more air.
Correct Answer
(A) 20
[#335] How will you decide the diameter of drill rod to be used in UG coal mines?
Correct Answer
(A) the rod must allow a clearance of at least 0.3 ern over the cartridge diameter