Exam 5: Water Treatment Processes and Unit Operations

Flocculation of iron from water by the addition of lime is an example of which of the following process?

Water softener units work most efficiently with particulate water.

How many types of aerators are commonly used in the treatment of water?

The pulsator clarifier is a type of

What is the detention period of a clarifier used in the treatment of water?

 ____________ is an operation designed to force agitation in the fluid and induce coagulation.

In which form of solute stabilization, hydrogen sulfide in water is oxidized into sulfate?

By which process, odour producing substances is oxidized?

Organic contaminants are removed from the water by the process of________    

What is the normal value of the detention period adopted in a flocculator for design purpose?

The ions with opposite charge can be exchanged.

Ion exchange units are known as________    

Which device solved the problem of unstable hydraulic conditions and operation of sludge removal equipment?

In which device, the primary mixing is followed by a secondary reaction zone resulting in formation of sludge blanket?

In which unit operation objectionable solutes are converted into unobjectionable forms without removal?

In which type of tube settler, tubes are slightly inclined in the direction of normal flow?

Solids are removed from the water by which of the following unit operation?

Which form of solute stabilization occurs when water passes through limestone?

Which of the following process is used to remove the colloidal particles from water?

The design value of the velocity of flow in a flocculator is________