Environmental Engineering in CE A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. 10000 to 100000 1000 to 2000 3000 to 6000 6000 to 9000 10000 to 100000 1000 to 2000 3000 to 6000 6000 to 9000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr. 0.1 to 1 15 to 20 3 to 6 10 to 15 0.1 to 1 15 to 20 3 to 6 10 to 15 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not an air pollutant? Carcinogens Ozone Pesticides Metallic powders Carcinogens Ozone Pesticides Metallic powders ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Aerobic biological oxidation ponds used for the purification of polluted water Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents Destroys/removes pathogen from the sewage All of these Destroys/removes pathogen much more effectively if the sewage is chlorinated Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents Destroys/removes pathogen from the sewage All of these Destroys/removes pathogen much more effectively if the sewage is chlorinated ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Iron & manganese present in the polluted water is removed by Chemical coagulation Oxidation followed by settling & filtration Chlorination only Simple filtration Chemical coagulation Oxidation followed by settling & filtration Chlorination only Simple filtration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes Reduced strength of textiles Fading of dyes on textiles Corrosion, tarnishing & soiling of metals All of these Reduced strength of textiles Fading of dyes on textiles Corrosion, tarnishing & soiling of metals All of these ANSWER DOWNLOAD EXAMIANS APP
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