Drilling And Blasting - Study Mode

[#626] It would be advisable to design the ventilation system on the basis of . . . . . . . .
Correct Answer

(D) Wet bulb temperature

[#627] It is good practice to select a station where there is no area changes particularly on the upstream side (ventilation survey) should atleast.
Correct Answer

(A) Five roadway diameter

[#628] A.N explosives detonated by
Correct Answer

(C) Booster

[#629] During blasting operation in underground workings which have approached within 9m of each other the Shotfirer shall not fire in any of the faces unless some conditions are complied with. Which of the following is not to be observed as per CMR 2017?
Correct Answer

(B) persons shall be withdrawn only from the face where blasting is going to be held

[#630] It is the area of opening through which would pass the same quantity of air as pass through the mine under same pressure called . . . . . . . .
Correct Answer

(B) Equivalent orifice