Environmental Engineering The alum, when added as a coagulant in water Increases pH value of water Does not require alkalinity in water for flocculation Does not affect pH value of water Decreases pH value of water Increases pH value of water Does not require alkalinity in water for flocculation Does not affect pH value of water Decreases pH value of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period in coagulation tanks is usually kept as 2 to 6 hours 1 to 2 minutes 30 to 45 minutes 2 to 6 days 2 to 6 hours 1 to 2 minutes 30 to 45 minutes 2 to 6 days ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The main disadvantage of oxidation pond is that None of these Maintenance and operation cost are high Large area is required for construction BOD removal is very low None of these Maintenance and operation cost are high Large area is required for construction BOD removal is very low ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be Separate system Partially combined system Partially separate system Combined system Separate system Partially combined system Partially separate system Combined system ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is Larger Same None of these Smaller Larger Same None of these Smaller ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following values of pH represents a stronger acid? 5 2 4 3 5 2 4 3 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS