Environmental Engineering Sewage treatment units are normally designed for 28 - 30 years 15 - 28 years 15 - 20 years 5 - 10 years 28 - 30 years 15 - 28 years 15 - 20 years 5 - 10 years ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following chemical compounds can be used for de-chlorination of water? Sulphur dioxide Bleaching powder Chloramines Carbon dioxide Sulphur dioxide Bleaching powder Chloramines Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be 400 ppm 100 ppm 200 ppm 300 ppm 400 ppm 100 ppm 200 ppm 300 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Disinfection efficiency is Increased at higher pH value of water Reduced at higher pH value of water Highest at pH value equal to 7 Unaffected by pH value of water Increased at higher pH value of water Reduced at higher pH value of water Highest at pH value equal to 7 Unaffected by pH value of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period for oxidation ponds is usually kept as 3 months 48 hours 24 hours 10 to 15 days 3 months 48 hours 24 hours 10 to 15 days ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following compounds is widely used for algae control? Sodium sulphate Calcium chloride Sodium chloride Copper sulphate Sodium sulphate Calcium chloride Sodium chloride Copper sulphate ANSWER DOWNLOAD EXAMIANS APP
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