Drilling And Blasting - Study Mode
[#221] Modern flame safety lamp can with stand an air velocity of . . . . . . . . m/sec.
Correct Answer
(C) 15
[#222] What happens, if the booster fan is placed too far out bye of the neutral line.
Correct Answer
(A) The pressure difference between intake and return increases
[#223] If CO/O 2 deficiency ratio is 2% it indicates . . . . . . . .
Correct Answer
(B) Approaching active fire
[#224] Staple pit also called as . . . . . . . .
Correct Answer
(A) Secondary shaft
[#225] Air crossings constructed where intake and return air . . . . . . . .
Correct Answer
(D) Crosses