Mine Ventilation - Study Mode
[#241] CO is than air
Correct Answer
(B) lighter
[#242] Metal mines, not deeps, say upto 300 m, the quantity of air that should go down the incline should be . . . . . . . . m 3 /min.
Correct Answer
(D) 4 - 5
[#243] For judging a working place suitable for man to work efficiently, without discomfort it is necessary to know.
Correct Answer
(D) all of these
[#244] Large concentrations of black damp in mins. can be removed only by improving
Correct Answer
(C) ventilation
[#245] If dry time is used, the result of cooling power by
Correct Answer
(A) conduction and convection