Drilling And Blasting - Study Mode
[#336] It is the area of imaginary opening in a thin plate which offer the same resistance to the passage of air as offered by the mine itself called . . . . . . . .
Correct Answer
(C) Equivalent orifice
[#337] An explosive is required to be in normal handling.
Correct Answer
(D) Insensitive
[#338] Speed of air in a mine measured by
Correct Answer
(D) Anemometer
[#339] By using of air leg relieves the operation of . . . . . . . . . involved in holding drill.
Correct Answer
(A) Fatigue
[#340] A roadway in the ore body which follows strike.
Correct Answer
(B) Level