Period of cleaning of slow sand filters is about________________?

Related Mcqs:

The most common cause of acidity in water is_______________?

A. carbon dioxide B. oxygen C. hydrogen D. nitrogen...

The velocity of flow does not depend on_______________?

A. grade of sewer B. length of sewer C. hydraulic mean depth of sewer D. roughness of sewer...

Which of the following unit works in anaerobic conditions ?

A. sludge digestion tank B. sedimentation tank C. activated sludge treatment D. trickling filters...

The characteristics of fresh and septic sewage respectively are____________________?

A. acidic and alkaline B. alkaline and acidic C. both acidic D. both alkaline...

The per capital consumption of a locality is affected by_________________?

1) climatic conditions 2) quality of water 3) distribution pressure The correct answer is? A. only (1) B. both (1) and (2) C. both (1) and (3) D. all (1), (2) and (3)...