Environmental Engineering The most common cause of acidity in water is Nitrogen Oxygen Carbon dioxide Hydrogen Nitrogen Oxygen Carbon dioxide Hydrogen 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 300 ppm 200 ppm 400 ppm 100 ppm 300 ppm 200 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Corrosion in concrete sewers is caused by Chlorine Dissolved oxygen Nitrogen Septic conditions Chlorine Dissolved oxygen Nitrogen Septic conditions ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The water carriage system of collection of waste product All of these Creates hygienic problem Is cheaper in initial cost than dry conservancy system Requires treatment before disposal All of these Creates hygienic problem Is cheaper in initial cost than dry conservancy system Requires treatment before disposal ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is (i)and(iv) (ii) and (iv) (i) and (ii) (ii) and (iii) (i)and(iv) (ii) and (iv) (i) and (ii) (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of BOD exerted at any time is Inversely proportional to BOD satisfied Directly proportional to BOD satisfied Inversely proportional to BOD remaining Directly proportional to BOD remaining Inversely proportional to BOD satisfied Directly proportional to BOD satisfied Inversely proportional to BOD remaining Directly proportional to BOD remaining ANSWER DOWNLOAD EXAMIANS APP
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