Drilling And Blasting - Study Mode
[#296] The quantity of coal dust amounts to rise in air as thick cloud is . . . . . . . . of space.
Correct Answer
(B) 80 - 40 g/m 3
[#297] To start a fire the conditions essential are
Correct Answer
Combustable material
[#298] Access to the deposit situated in near to surface very larger and wider, shallow depth, to get large out put by using machinery per annum.
Correct Answer
(A) Haul roads
[#299] Antisetting agents in an explosive to prevent.
Correct Answer
(C) Caking of salts
[#300] A wearer can use the gas mask canister for service period of nearly . . . . . . . . hours in irrespirable atmosphere.
Correct Answer
(A) 1 - 2