In a concrete canal the approximate permissible velocity of water should not exc

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Question
In a concrete canal the approximate permissible velocity of water should not exceed
Options
A. 0.5 m/sec
B. 1 m/sec
C. 1.5 m/sec
D. 2 m/sec
E. 2.5 m/sec

Correct Answer

2 m/sec

Irrigation problems

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1. To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls
Options
A. of R.C.C. or steel plate 8 cm thick
B. of height l/3rd to l/4th the depth of water in the main canal
C. spaced at interval of times their heights
D. extending about one metre beyond a line drawn at an inclination of 2 : 1 to the axis of main canal
E. all the above.

2. The water face of the guide banks, is protected by
Options
A. one men stone pitching
B. two man stone pitching
C. three man stone pitching
D. four man stone pitching
E. five man stone pitching.

6. If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle ? with horizontal, the hydraulic mean depth is
Options
A. D
B. D/2
C. D/3
D. D/4
E. D/5

7. The ratio of the rate of change of discharge of an outlet and parent channel, is known as
Options
A. efficiency
B. sensitivity
C. flexibility
D. modular limit.

10. According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is
Options
A. 1.25 D
B. 1.50 D
C. 1.75 D
D. 2.00 D

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