Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 50 5000 1000 2000 50 5000 1000 2000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE __________ can not control the noise pollution. Use of silencers Vibration damping Tree plantation Green house gases Use of silencers Vibration damping Tree plantation Green house gases 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 Acetylene Ammonia Carbon monoxide Hydrogen Acetylene Ammonia ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. 3000 to 6000 1000 to 2000 10000 to 100000 6000 to 9000 3000 to 6000 1000 to 2000 10000 to 100000 6000 to 9000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a secondary air pollutant? Ozone Photochemical smog Sulphur dioxide All of these Ozone Photochemical smog Sulphur dioxide All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Polluted water having low BOD are most economically treated in Sedimentation tanks Sludge digester Clarifier Oxidation ponds Sedimentation tanks Sludge digester Clarifier Oxidation ponds ANSWER DOWNLOAD EXAMIANS APP
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