Environmental Engineering in CE Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). 0.2 0.002 4.8 1.2 0.2 0.002 4.8 1.2 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In sewage treatment, its sedimentation is speeded up by commonly adding Copper sulphate Sodium sulphate Hydrochloric acid Lime Copper sulphate Sodium sulphate Hydrochloric acid Lime ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called Stratosphere Troposphere Mesosphere Thermosphere Stratosphere Troposphere Mesosphere Thermosphere ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called Fumes Aerosols Mists Smoke Fumes Aerosols Mists Smoke ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'? Dust & mists None of these Smoke & fumes Photochemical smog & soot Dust & mists None of these Smoke & fumes Photochemical smog & soot ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas? Carbon monoxide Hydrogen Ammonia Acetylene Carbon monoxide Hydrogen Ammonia Acetylene ANSWER DOWNLOAD EXAMIANS APP
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