The maximum efficiency of BOD removal is achieved in______________?

Related Mcqs:

In water treatment, rapid gravity filters are adopted to remove_______________?

A. dissolved organic substances B. dissolved solids and dissolved gases C. floating solids and dissolved inorganic solids D. bacteria and colloidal solids...

The self cleansing velocity for all sewers in India is usually_________________?

A. less than 1.0 m/sec B. 1.0 m/sec to 1.2 m/sec C. 1.5 m/sec to 2.0 m/sec D. 3.0 m/sec to 3.5 m/sec...

Sludge volume index is defined as the ratio of_______________?

A. percentage of sludge by volume to percentage of suspended solids by weight B. percentage of sludge by volume to percentage of total solids by weight C. percentage of suspended solids by weight to percentage of sludge by volume D. percentage of total solids by weight to percentage of sludge by volume...

The characteristics of fresh and septic sewage respectively are____________________?

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

The detention period in coagulation tanks is usually kept as_______________?

A. 1 to 2 minutes B. 30 to 45 minutes C. 2 to 6 hours D. 2 to 6 days...