Irrigation problems
- 1. Trial procedure of canal design by Kennedy's theory is based upon the equation
Options- A. Q = A . Y
- B.
- C.
- D. all the above. Discuss
Correct Answer: all the above.
- 2. If straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle ? with horizontal, the area of its cross-section, is
Options- A. R(? + tan ?)
- B. R(? + cot ?)
- C. R2(? + tan ?)
- D. R2(? + cot ?)
- E. R(? + tan ?) Discuss
Correct Answer: R2(? + cot ?)
- 3. An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as
Options- A. non-modular outlet
- B. semi-modular outlet
- C. flexible modular outlet
- D. right modular outlet. Discuss
Correct Answer: right modular outlet.
- 4. A minimum of 90 cm free board is provided if the discharge in the canal is between
Options- A. 30 to 33 cumecs
- B. 30 to 60 cumecs
- C. Over 60 cumecs
- D. Over 100 cumecs Discuss
Correct Answer: Over 60 cumecs
- 5. The length and width of a meander and also the width of the river, vary roughly as
Options- A. square root of the discharge
- B. discharge
- C. square of the discharge
- D. cube of the discharge. Discuss
Correct Answer: square root of the discharge
- 6. The Lacey's regime velocity is proportional to
Options- A. R1/2 S3/4
- B. Q3/4 S1/3
- C. R3/4 S1/3
- D. R2/3 S1/2 Discuss
Correct Answer: R3/4 S1/3
- 7. For a unique design of a channel by Kennedy's theory
Options- 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. Discuss
Correct Answer: its breadth and depth ratio must only be known
- 8. Pick up the correct statement from the following:
Options- A. Gravity water is harmful to crops
- B. Hygroscopic water remains attached to soil molecules by chemical bond
- C. Capillary moisture held in the soil pores against gravity by surface tension, is utilised by plants
- D. All the above. Discuss
Correct Answer: Capillary moisture held in the soil pores against gravity by surface tension, is utilised by plants
- 9. The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is
Options- A. 1.084
- B. 1.074
- C. 1.064
- D. 1.054
- E. 2.053 Discuss
Correct Answer: 1.084
- 10. If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ? is the density of water, then
Options- A. total pressure on the surface is equal to ? x
- B. depth of the point at which total pressure acts is equal to its moment of inertia divided by A x
- C. depth of the centre of pressure is 2/3H vertically below the surface
- D. all the above. Discuss
Correct Answer: all the above.
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