The fan efficiency is given by . . . . . . . .
A. $$\frac{{{\text{Brake HP}}}}{{{\text{air HP}}}}$$
B. $$\frac{{{\text{air HP}}}}{{{\text{Break HP}}}}$$
C. $$\frac{{{\text{HP of ventilation}}}}{{{\text{HP input}}}}$$
D. 3m
Answer: Option B
This Question Belongs to Mining Engineering >> Drilling And Blasting
Which of the following prime characteristic the nonel blasting has?
A. It has greater shock to the surrounding
B. It is noiseless in character
C. It has tremendous effect on explosive column
D. It can not be used in a place where there is a chance of stray current
A. Five, Explosion
B. Gas, Outburt
C. Rockburst, bump
D. None
Cyclone, bag filter and scrubber can be used for control.
A. Water pollution
B. Soil pollution
C. Air pollution
D. Noise pollution
A two phase system in which an inner or dispersed phase is distributed in an outer called
A. Emulsion
B. Slurry
C. Explosion
D. Erosion
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