Drilling And Blasting - Study Mode
[#496] Find the watergauge required to pass 1500 m 3 of air/min through an air way of 2.5 × 3 m cross section and 2000 m long.
Correct Answer
(A) 32.6 mm.wg
[#497] Earth quake loading frequency is about. . . . . . . . .
Correct Answer
(C) 10 Hz
[#498] A building where explosives and detonators are stored is called
Correct Answer
(A) shelter
[#499] Self contained breathing apparatus used in our mines are of well known makes
Correct Answer
(B) Drager
[#500] Low mixture of methane burn in air producing . . . . . . . . flame.
Correct Answer
(C) Blueish