Environmental Engineering in CE Lagoons used for purification of polluted water Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre All of these Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre All of these Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is a secondary air pollutant? Sulphur dioxide Nitrogen dioxide Photochemical smog Dust particles Sulphur dioxide Nitrogen dioxide Photochemical smog Dust particles ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In water chemical treatment plant, use of chloramines ensures Weed control in reservoirs Taste & odour control Disinfection Removal of permanent hardness Weed control in reservoirs Taste & odour control Disinfection Removal of permanent hardness ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels. 145 85 125 105 145 85 125 105 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by Chemical coagulation Centrifugation Ultrafiltration Floatation & skimming Chemical coagulation Centrifugation Ultrafiltration Floatation & skimming ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Tolerable limit of nitrogen oxides in air is __________ ppm. 25 1 0.1 5 25 1 0.1 5 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS