Civil Engineering - Irrigation

Exercise :: Irrigation - Section 1

31. 

The main function of a diversion head works of a canal from a river, is

A. to remove silt
B. to control floods
C. to store water
D. to raise water level
E. all the above.

Answer: Option D

Explanation:

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32. 

Side slopes generally kept for canals in loam soil, are :

A. 1 : 1 in cutting and : 1 in filling
B. : 1 in cutting and 2 : 1 in filling
C. Neither (a) nor (b)
D. Both (a) and (b)

Answer: Option D

Explanation:

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33. 

When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

A. syphon
B. aqueduct
C. super passage
D. syphon-aqueduct.

Answer: Option C

Explanation:

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34. 

For the conditions enumerated to provide a crossing at C1 You will probably provide

A. an aqueduct
B. a super-passage
C. a syphon aqueduct
D. none of these.

Answer: Option B

Explanation:

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35. 

If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is

A. R(θ + tan θ)
B. 2R(θ + tan θ)
C. R(θ + cos θ)
D. 2R(θ + cos θ)
E. none of these.

Answer: Option D

Explanation:

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