Drilling And Blasting - Study Mode
[#591] The coefficient of friction in smooth lined roadway . . . . . . . .
Correct Answer
(A) 0.00216
[#592] Coal dust explosions can be prevented by
Correct Answer
reducing formation of dust
[#593] These type of explosives commonly used in under ground coal mines.
Correct Answer
(D) Permitted
[#594] Explosives are used in mines for . . . . . . . . coal/mines.
Correct Answer
(C) Break
[#595] The percentage of charcoal in gun powder.
Correct Answer
(C) 15%