Q321
Open questionInternationally accepted value of standard atmospheric pressure in SI units is . . . . . . . . N/m2.
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Mining Engineering · all questionsMine Ventilation
Mine Ventilation
practice.
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440
Questions
17/22
Page
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Q322
Open questionThe percentage of oxygen present in mine atmospheric air by volume.
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Q323
Open questionHow much O2 inhaled by a healthy person
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Q324
Open questionThe instruments helpful for proper control of mine ventilation, ones environmental conditions for human work are
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Q325
Open questionEvery main mechanical ventilator, there should be of . . . . . . . . indipendent electric circuits for power supply to it.
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Q326
Open questionA well designed evasee increases the . . . . . . . . of far.
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Q327
Open questionModern flame safety lamp can withstar an air velocity of in m/s.
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Q328
Open questionThe flame safety lamp is used for detecting.
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Q329
Open questionCritical pressure of CO
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Q330
Open questionSO2 is . . . . . . . . gas
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Q331
Open questionThe relative rates of disfusion of number of gases vary inversely as square root of their relative densities called
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Q332
Open questionCO is than air
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Q333
Open questionMetal mines, not deeps, say upto 300 m, the quantity of air that should go down the incline should be . . . . . . . . m3/min.
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Q334
Open questionFor judging a working place suitable for man to work efficiently, without discomfort it is necessary to know.
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Q335
Open questionLarge concentrations of black damp in mins. can be removed only by improving
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Q336
Open questionIf dry time is used, the result of cooling power by
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Q337
Open questionThe safe limit of CO in the air of an under ground working for persons to work is
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Q338
Open questionIf CO2 replaces air by . . . . . . . .% severe distress for few min.
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Q339
Open questionThe weight of OXD-2M compact instrument
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Q340
Open questionSO2 produced in mines in small quantities during
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