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? Ammonia Carbon monoxide Acetylene Hydrogen Ammonia Carbon monoxide Acetylene Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. 90 60 120 105 90 60 120 105 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 5000 50 1000 2000 5000 50 1000 2000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Aerobic biological oxidation ponds used for the purification of polluted water Destroys/removes pathogen much more effectively if the sewage is chlorinated Destroys/removes pathogen from the sewage All of these Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents Destroys/removes pathogen much more effectively if the sewage is chlorinated Destroys/removes pathogen from the sewage All of these Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Biological oxidation ponds remove organic matters present in the polluted water by Both A & B Neither A nor B Using the activities of bacteria and other micro organisms Aerobic oxidation Both A & B Neither A nor B Using the activities of bacteria and other micro organisms Aerobic oxidation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is a green house gas other than CO₂ ? All of these Chlorofluro carbons (CFC) Methane Nitrous oxide All of these Chlorofluro carbons (CFC) Methane Nitrous oxide ANSWER DOWNLOAD EXAMIANS APP
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