Civil Engineering - Irrigation

Exercise :: Irrigation - Section 1

41. 

The discharge over a trapezoidal crest of a Sarda fall with free over fall conditions, is

A. 0.45 2g . LH3/2 (H/B)1/3
B. 0.45 2g . LH2/3 (H/B)2/3
C. 0.45 2g . LH3/2 (H/B)1/6
D. 0.45 2g . LH1/6 (H/B)3/2

Answer: Option C

Explanation:

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42. 

If q is the discharge per unit width of a channel and D1 D2 are the depths of water before and after hydraulic jump, the following relationship is true

A.
B.
C.
D.

Answer: Option C

Explanation:

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43. 

A river training work is generally required when the river is

A. meandering
B. aggrading
C. degrading
D. all the above.

Answer: Option A

Explanation:

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44. 

For loss of head in a canal inverted syphon barrel, the factor in the Unwin formula is a coefficient for loss of head due to

A. friction
B. exit
C. entry
D. gradient

Answer: Option C

Explanation:

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45. 

Pick up the correct statement from the following:

A. If the flexibility is more than one, the outlet is hyper-proportional
B. If the setting of an outlet is higher than that required for proportionality, the outlet is hyper-proportional
C. If the setting of an outlet is lower than that required for proportionality, the outlet is sub-proportional
D. If the flexibility is zero, it is a rigid module
E. All the above.

Answer: Option E

Explanation:

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