Civil Engineering - Irrigation

Exercise :: Irrigation - Section 2

26. 

The optimum depth of kor watering for a rice crop, is

A. 23.0 cm
B. 19.0 cm
C. 17.5 cm
D. 13.5 cm
E. 12.0 cm

Answer: Option B

Explanation:

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27. 

Bligh's theory of seepage assumes

A. equal weightage to the horizontal and vertical creep
B. more weightage to horizontal creep than vertical creep
C. less weightage to horizontal creep than vertical creep
D. loss of head follows the sine curve.

Answer: Option A

Explanation:

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28. 

The Lacey's regime velocity is proportional to

A. R1/2 S3/4
B. Q3/4 S1/3
C. R3/4 S1/3
D. R2/3 S1/2

Answer: Option C

Explanation:

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29. 

A hydraulic jump is generally formed when a stream moving with

A. a hyper-critical velocity meets a stream moving with a critical velocity
B. a hyper-critical velocity meets a stream moving with a hyper-critical velocity
C. A hyper-critical velocity meets a stream moving with a sub-critical velocity
D. a sub-critical velocity meets a stream moving with a hyper-critical velocity.

Answer: Option C

Explanation:

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30. 

For a unique design of a channel by Kennedy's theory

A. its breadth must only be known
B. its depth must only be known
C. its breadth and depth ratio must only be known
D. all the above.

Answer: Option C

Explanation:

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