Q341
Open questionHow many tests for gases are made before blasting in gassy mine.
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Mining Engineering · all questionsMine Ventilation
Mine Ventilation
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440
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Q342
Open questionThe specific gravity of oxygen is
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Q343
Open questionThe pressure measuring instrument used in certain types of ventilation surveys is
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Q344
Open question100 vols. of water disolving CO2 at 15°C . . . . . . . . vol. of CO2.
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Q345
Open questionWhen methane burns in air this produces
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Q346
Open questionPrinciple behind the rekins interferometer is
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Q347
Open questionThe temperature and relative humidity of air increase in the vicinity of a place of . . . . . . . .
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Q348
Open questionAutomatic fire damp detector operates as the principle of . . . . . . . .
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Q349
Open questionThe wet kata for light manual workers is
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Q350
Open questionThe unit bar used by the metrologists to measure the atmospheric pressure is equivalent to
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Q351
Open questionH2S inflammable limits.
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Q352
Open questionThe formula for finding density of moist air in S.I units in kg/m3.
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Q353
Open questionThe cause which tend to cool the air in mine . . . . . . . .
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Q354
Open questionThe effect of breathing air containing CO % in air is 0.02, the symptoms are
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Q355
Open questionRange of middle infrared in optical spectrum is
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Q356
Open questionWhat are the sources which contributes the moisture content of mine air.
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Q357
Open questionTo combat fire in goaf the following as introduced
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Q358
Open questionThe sp.gr of nitrogen.
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Q359
Open questionThe poisonous gas is . . . . . . . .
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Q360
Open questionMulti gas detector manufactured by the company.
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