Drilling And Blasting - Study Mode
[#536] The samples should be taken behind the sealed of area when the barometric pressure is . . . . . . . .
Correct Answer
(D) Low
[#537] Explosive is solid/liquid/mixture of substances which change themselves instantaiously in to large volume of gases at high temperature and pressure when . . . . . . . . applied to it.
Correct Answer
(A) Detonation
[#538] The primary or forward shockwave precedes the flames of explosion which consumes all . . . . . . . . of the air.
Correct Answer
(D) O 2
[#539] Forcing fan requires air lock at . . . . . . . . shaft.
Correct Answer
(B) DC shaft
[#540] The formula for calculating lower limit of explosibility of gas mixture [X] = ?
Correct Answer
(B) $$left[ {frac{{100}}{{frac{{{P_1}}}{{{N_1}}} + frac{{{P_2}}}{{{N_2}}} + frac{{{P_3}}}{{{N_3}}}}}}
ight]\% $$