Civil Engineering - Irrigation

Exercise :: Irrigation - Section 1

46. 

Pick up the correct statement from the following:

A. Duty of canal water is defined as the total area irrigated by the discharge averaging one unit during the base period of the duty
B. Duty of canal water is usually calculated at the head discharge of a channel
C. Duty of canal water at the head of a channel and at the outlet of a distributary, differ considerably due to progressive losses of water
D. Duty of canal water at the outlet of a distributary, is generally known as outlet factor or outlet discharge factor
E. All the above.

Answer: Option E

Explanation:

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47. 

Water-shed line is abondened for aligning an irrigation canal if

A. water shed forms a sharp loop
B. canal has to take off from a river
C. towns and villages are located on the water shed line
D. all the above.

Answer: Option D

Explanation:

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48. 

Pick up the incorrect statement from the following

A. A bank in the cross-section of a canal is provided on the right
B. A bank in the cross-section of a canal is provided on the left
C. A 'dowla' in the cross-section of a canal is provided on the left
D. None of these.

Answer: Option B

Explanation:

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49. 

For a given discharge in a channel, Blench curves give the relationship between the loss of head (HL) and

A. specific energy up-stream
B. specific energy down-stream
C. critical depth of water down-stream
D. depth of water down-stream

Answer: Option B

Explanation:

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