Civil Engineering - Water Supply Engineering

16. 

Water losses in water supply, is assumed as

A. 5%
B. 7.5%
C. 10%
D. 22.5%
E. 15%.

Answer: Option E

Explanation:

No answer description available for this question. Let us discuss.

17. 

The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form

A. Mono-chloramine (NHCl)
B. Di-chloramine (NH2Cl)
C. Nitrogen trichloramine (NCl3)
D. All the above.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

18. 

'Shrouding' is essentially provided in

A. strainer type wells
B. cavity type wells
C. slotted type well
D. all the above.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

19. 

The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is

A. 1 mg/litre
B. 2 mg/litre
C. 3 mg/litre
D. 4 mg/litre
E. 5 mg/litre.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

20. 

Chemical coagulation of drinking water, is done

A. to settle suspended materials
B. to increase rate of settlement of suspended materials
C. to remove the bacterias
D. none of these.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.