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- Question
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.
- Correct Answer
- all the above.
- 1. 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. Discuss
- 2. The ratio of the head recovered to the head put in, is known as
Options- A. efficiency
- B. sensitivity
- C. flexibility
- D. modular limit. Discuss
- 3. If average particle size of the silt in millimetres is m, the Lacey's silt factor f is proportional to
Options- A. m
- B. m3
- C. m1/2
- D. m1/3
- E. m2/3 Discuss
- 4. Disposal of extra excavated earth of canals, is utilised to provide a spoil bank on
Options- A. left side
- B. right side
- C. both sides
- D. all the above. Discuss
- 5. Cross regulators in main canals are provided
Options- A. to regulate water supply in the distributaries
- B. to increase water head upstream when a main canal is running with low supplies
- C. to overflow excessive flow water
- D. none of these. Discuss
- 6. 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 Discuss
- 7. 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 Discuss
- 8. 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. Discuss
- 9. Finally formed berms in canals are provided for
Options- A. protection of banks erosion by the waves
- B. control of seepage losses
- C. strengthening of banks
- D. all the above. Discuss
- 10. V and R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey's silt factor f is
Options- A.
- B.
- C.
- D.
Discuss
Irrigation problems
Search Results
Correct Answer: one men stone pitching
Correct Answer: efficiency
Correct Answer: m1/2
Correct Answer: all the above.
Correct Answer: to increase water head upstream when a main canal is running with low supplies
Correct Answer: 2 m/sec
Correct Answer: D/2
Correct Answer: flexibility
Explanation:
Flexibility: It provides a criteria for judging the behaviour of modules and semi-modules. It is generally denoted by letter 'F'. It is the ratio of the rate of change of outlet discharge to the rate of change of discharge of the parent channel.
Correct Answer: all the above.
Correct Answer:
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