The factor responsible for purification of sewage in river is________________?

Related Mcqs:

For efficient working of a sewer, it must be ensured that _____________?

A. Minimum velocity of 0.45 m/sec, is maintained at its minimum flow B. A maximum velocity of 0.90 m/sec, is maintained at its maximum flow C. Both A. and B. D. Neither A. nor B....

A well oxidized sewage contains nitrogen mainly as___________________?

A. Nitrates B. Nitrites C. Free ammonia D. None of these...

The first stage of neutral process of sludge digestion, is__________________?

A. Acid fermentation B. Acid regressio C. Alkaline fermentation D. None of these...

The small sewers are cleaned by____________________?

A. Flushing B. Cane rodding C. Wooden pills D. None of these...

Pick up the correct statement from the following ?

A. Turbidity is more in strong sewage B. The black colour indicates septic sewage C. The sewage omits offensive odours after four hours D. All the above...