Drilling And Blasting - Study Mode
[#126] An air screw fan is convinient as to use an under ground . . . . . . . . fan.
Correct Answer
(A) Booster fan
[#127] Measuring accuracy of electronic amemometer.
Correct Answer
(B) ±2%
[#128] The pressure on phreautic surface is
Correct Answer
(D) Equal to atmospheric pressure
[#129] Caustite is a mixture of . . . . . . . . used in gas mask.
Correct Answer
(B) Pumica + Caustic soda
[#130] The first barrier also called
Correct Answer
(B) Light