Environmental Engineering in CE The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel. 5 10 1 20 5 10 1 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes Fire hazards Depletion of dissolved oxygen Persistent foam Explosion hazards Fire hazards Depletion of dissolved oxygen Persistent foam Explosion hazards ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Foul odour and bad taste of water is removed by treating with Copper sulphate Activated carbon Bleaching powder Alum Copper sulphate Activated carbon Bleaching powder Alum ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Most of the atmospheric air pollutants are present in large quantity in Mesosphere Stratosphere Trophosphere Thermosphere Mesosphere Stratosphere Trophosphere Thermosphere ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels. 60 120 90 20 60 120 90 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a source of ozone emission in the atmosphere? High voltage electrical equipments Dermatological photo-therapy equipments Xerox machines Refrigerators High voltage electrical equipments Dermatological photo-therapy equipments Xerox machines Refrigerators ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS