Q261
Open questionThe pressure which support the column of the mercury . . . . . . . . mm high at sea level when the temperature of mercury is . . . . . . . .°C.
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Mining Engineering · all questionsMine Ventilation
Mine Ventilation
practice.
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440
Questions
14/22
Page
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Q262
Open questionThis is the pressure exerted by fluid by virtue of its motion called . . . . . . . .
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Q263
Open questionPortable interferometer type methane gas indicator to measure the methane content in methane air mixture scale offers a range of . . . . . . . . methane by vol.
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Q264
Open questionWhich gas is most toxic gas.
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Q265
Open questionGas blower accompained by . . . . . . . . sound.
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Q266
Open questionA mechanical mixture of extinctive gases carbondioxide and excess nitrogen reffered as
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Q267
Open questionThe height of excess of air column of D.C shaft, 1 m2 in cross section which gives rise to NVP called.
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Q268
Open questionSynonymous with sulphureted hydrogen called as
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Q269
Open questionHuman beings can survive in an atmospheric containing as low as . . . . . . . .% oxygen.
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Q270
Open questionOver all weight of portable optical methanometer.
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Q271
Open questionA place is not considered to be free from fire damp if the gas percentage is above . . . . . . . .
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Q272
Open questionThe basic working principle behind the aneroid barometer.
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Q273
Open questionHopcalite detector manufactured by the company.
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Q274
Open questionThe impurity in mine air way is
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Q275
Open questionMinimum percentage of CO detects by multi gas detector in . . . . . . . . ppm.
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Q276
Open questionCO forms explosive mixture with air present within the range nearly . . . . . . . . by vol.
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Q277
Open questionThe colour of hoomalite
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Q278
Open questionIn still air flame of a flame safety lamp is extinguished at CO2 percentage of . . . . . . . .
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Q279
Open questionNumber of blades in a single inlet centrifugal fan.
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Q280
Open questionIdentify the method for testing methane in mine are
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