Waste Water Engineering To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of Hydrochloric acid Citric acid Sulphuric acid Nitric acid Hydrochloric acid Citric acid Sulphuric acid Nitric acid ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains Carbon dioxide Hydrogen sulphide Methane Oxygen Carbon dioxide Hydrogen sulphide Methane Oxygen ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The use of coarse screens for the disposal of sewage, may be dispensed with by Comminutor Both A and B Neither A nor B Shredder Comminutor Both A and B Neither A nor B Shredder ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is 1 hour 30 minutes 2 hours 1 hour and 30 minutes 1 hour 30 minutes 2 hours 1 hour and 30 minutes ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In very first stage of decomposition of the organic matter in sewage Carbondioxide is formed Nitrates are formed Ammonia is formed Nitrites are formed Carbondioxide is formed Nitrates are formed Ammonia is formed Nitrites are formed ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Aerobic activity is maximum None of these In freshly produced sewage At sewer pipes In sewer treatment plants None of these In freshly produced sewage At sewer pipes In sewer treatment plants ANSWER DOWNLOAD EXAMIANS APP
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