Civil Engineering - Water Supply Engineering

11. 

Most important method for calculating discharge for planning a water supply project, is

A. velocity area method
B. weir or spillway method
C. use of venturi-meter
D. using power plant consumption
E. none of these.

Answer: Option A

Explanation:

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12. 

Alkalinity in water may be caused due to

A. calcium and magnesium bicarbonates
B. sodium carbonate
C. potassium carbonate
D. calcium hydroxide
E. all the above.

Answer: Option E

Explanation:

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13. 

Open channels supported over tres-les, are generally known as

A. raised canals
B. acqueducts
C. syphons
D. flumes.

Answer: Option D

Explanation:

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14. 

For least effect on the water table, the tube wells must be dug one in every

A. 0.5 sq km
B. 0.75 sq km
C. 1.0 sq km
D. 1.25 sq km
E. 1.5 sq km.

Answer: Option E

Explanation:

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15. 

In plain sedimentation tanks under normal conditions, impurities are removed upto

A. 60%
B. 70%
C. 80%
D. 90%.

Answer: Option B

Explanation:

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