Civil Engineering - Water Supply Engineering

11.
Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between
250 to 500
500 to 750
750 to 1000
1000 to 1250
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
In a rapid sand filter, air binding is caused due to excessive
negative pressure
pressure
turbidity
water pressure
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

13.
If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in
10 years
15 years
20 years
25 years
50 years.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
A circular gravity aqueduct is not generally preferred to because of
its maximum hydraulic mean depth
maximum area per unit of wetted perimeter
minimum cost of construction
its proper support on the ground.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

15.
Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided
silica
mud
clay
organic matter.
Answer: Option
Explanation:
No answer description is available. Let's discuss.