Drilling And Blasting - Study Mode
[#616] The strata temperature and crushing effect of superincumbent rocks of coal seam accelerate of
Correct Answer
(A) Self heating
[#617] Find the efficiency of the fan of the BHP is 45 and air hp is 15.
Correct Answer
(A) 33.3%
[#618] The main purpose of a Booster fan a mechanical ventilator usedbelow ground for
Correct Answer
(B) Boosting whole current of air passing along intake or return air way of a mine or ventilating district
[#619] Vertical, steeply inclined passage driven downward movement of ore by gravity, not employed in coal mining.
Correct Answer
(A) Ore pass
[#620] Most of the high explosives blasted with the help of detonator said to be
Correct Answer
(B) Cap sensitive