Irrigation problems
- 1. Irrigation canals are generally aligned along
Options- A. ridge line
- B. contour line
- C. valley line
- D. straight line. Discuss
Correct Answer: ridge line
- 2. The measure to remove water logging of land, is
Options- A. to reduce percolation from canals and water courses
- B. to increase outflow from the ground water reservoir
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
Correct Answer: both (a) and (b)
- 3. Retrogression of the bed level of a river downstream a weir, occurs due to
Options- A. heavy impact of water
- B. increase of the bed level
- C. less percentage of silt
- D. soft soil strata. Discuss
Correct Answer: less percentage of silt
- 4. The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept
Options- A. 0.20 m
- B. 1.20 m
- C. 2.20 m
- D. 3.20 m
- E. 4.90 m Discuss
Correct Answer: 1.20 m
- 5. For a given discharge in a channel, Blench curves give the relationship between the loss of head (HL) and
Options- A. specific energy up-stream
- B. specific energy down-stream
- C. critical depth of water down-stream
- D. depth of water down-stream Discuss
Correct Answer: specific energy down-stream
- 6. Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
Options- A. populated area
- B. alkaline area
- C. forest area
- D. fallow land. Discuss
Correct Answer: fallow land.
- 7. The sinuosity of a meander is the ratio of
Options- A. meander length and the width of meander
- B. meander length and half width of the river
- C. curved length and the straight distance
- D. none of these. Discuss
Correct Answer: curved length and the straight distance
- 8. Pick up the correct statement from the following
Options- A. In a level crossing, a crest with its top at the canal F.S.L. is provided across the drainage at its up-stream junction with canal
- B. In a level crossing a regulator is provided across the drainage at its down-stream
- C. In a level crossing, a cross regulator is provided on the canal below the crossing
- D. All the above. Discuss
Correct Answer: All the above.
- 9. In a canal syphon, the flow is
Options- A. under atmospheric pressure
- B. pipe flow
- C. with critical velocity
- D. under negative pressure. Discuss
Correct Answer: pipe flow
- 10. Water-shed line is abondened for aligning an irrigation canal if
Options- A. water shed forms a sharp loop
- B. canal has to take off from a river
- C. towns and villages are located on the water shed line
- D. all the above. Discuss
Correct Answer: all the above.
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