Environmental Engineering The detention period in coagulation tanks is usually kept as 30 to 45 minutes 2 to 6 days 2 to 6 hours 1 to 2 minutes 30 to 45 minutes 2 to 6 days 2 to 6 hours 1 to 2 minutes ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 6.5 to 8.0 4.5 to 6.0 10.5 to 12.0 8.5 to 10.0 6.5 to 8.0 4.5 to 6.0 10.5 to 12.0 8.5 to 10.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Most suitable section of sewer in separate sewage system is Standard form of egg shaped sewer Modified egg shaped section Rectangular section Circular section Standard form of egg shaped sewer Modified egg shaped section Rectangular section Circular section ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of BOD exerted at any time is Directly proportional to BOD remaining Inversely proportional to BOD satisfied Inversely proportional to BOD remaining Directly proportional to BOD satisfied Directly proportional to BOD remaining Inversely proportional to BOD satisfied Inversely proportional to BOD remaining Directly proportional to BOD satisfied ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The most common cause of acidity in water is Oxygen Hydrogen Nitrogen Carbon dioxide Oxygen Hydrogen Nitrogen Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum efficiency of BOD removal is achieved in Trickling filters Aerated lagoons Oxidation ditch Oxidation pond Trickling filters Aerated lagoons Oxidation ditch Oxidation pond ANSWER DOWNLOAD EXAMIANS APP
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