Drilling And Blasting - Study Mode

[#211] To avoid freezing of NG explosive which agent is mixed.
Correct Answer

(C) Di Nitro Glycol

[#212] Maximum or shut off head developed by centrifugal fan when
Correct Answer

(B) Noair passes through fan

[#213] The formula for theoretical depression of axial flow fan will be
Correct Answer

(D) $$H = frac{{{U^2}}}{g}$$

[#214] The self rescuer can be used for . . . . . . . . hours.
Correct Answer

(A) 1

[#215] Coal mines are said to be steep if the inclination in between.
Correct Answer

(B) 18° - 40°