N

Nisha Gupta • 2.32K Points
Master 

Q. Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

(A) Coagulation and flocculation of colloids
(B) Oxidation of carbonaceous matter to CO2
(C) Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate
(D) All (A), (B) and (C)
Correct : Option (D)

Share

Previous

Next

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs

Q. Commonly use retarders is……

Q. In which of the following measuring devices Bernoulli’s equation is used:

Q. In case of forced vortex, the rise of liquid level at the ends is .... the fall of liquid level at the axis of rotation.

Q. The stress in the wall of a thin cylinder subjected to internal pressure, is

Q. The liquid limit exists in ?

Q. In direct current (DC), the electric charge (current) only flows in ___direction.

Q. The specific speed of a hydraulic turbine depends upon

Q. “For deep foundation depth of foundation is less than or equal to the width of the foundation” is it true or false?

Q. Which of the following have an influence on the value of permeability ?

Q. The principle of jet propulsion is used in driving the ships and aeroplanes.