Environmental Engineering in CE Maximum permissible residual chlorine in treated water should be __________ mg/litre. 02 to 0.3 0.001 to 0.01 2 to 3 5 to 10 02 to 0.3 0.001 to 0.01 2 to 3 5 to 10 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria. Aerobic Parasitic Anaerobic Saphrophytic Aerobic Parasitic Anaerobic Saphrophytic ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of potable water should be between 4 to 5 6.5 to 8 1 to 1.5 13 to 14 4 to 5 6.5 to 8 1 to 1.5 13 to 14 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of __________ in water stream are deleterious to aquatic life. Suspended solids Heavy metals and cynides Soluble and toxic organics All of these Suspended solids Heavy metals and cynides Soluble and toxic organics All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm. 1000 500 10000 5 1000 500 10000 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE __________ plant emits large amount of SO₂ as an air pollutant. Iron & steel Sulphuric acid Chloralkali Nitric acid Iron & steel Sulphuric acid Chloralkali Nitric acid ANSWER DOWNLOAD EXAMIANS APP
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