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Irrigation problems

  • 1. For loss of head in a canal inverted syphon barrel, the factor in the Unwin formula Civil Engineering Irrigation: For loss of head in a canal inverted syphon barrel, the factor in the Unwin formula is a coefficient for loss of head due to

  • Options
  • A. friction
  • B. exit
  • C. entry
  • D. gradient
    • Discuss
  • 2. The difference in level between the top of a bank and supply level in a canal, is called

  • Options
  • A. berm
  • B. free board
  • C. height of bank
  • D. none of these.
    • Discuss
  • 3. Groynes are generally built

  • Options
  • A. perpendicular to the bank
  • B. inclined up stream up to 30°
  • C. inclined down stream upto 30°
  • D. all the above.
    • Discuss
  • 4. For the conditions enumerated to provide a crossing at C1 You will probably provide

  • Options
  • A. an aqueduct
  • B. a super-passage
  • C. a syphon aqueduct
  • D. none of these.
    • Discuss
  • 5. Side slopes generally kept for canals in loam soil, are :

  • Options
  • A. 1 : 1 in cutting and : 1 in filling
  • B. : 1 in cutting and 2 : 1 in filling
  • C. Neither (a) nor (b)
  • D. Both (a) and (b)
    • Discuss
  • 6. If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle ? with horizontal, the perimeter of the canal is

  • Options
  • A. R(? + tan ?)
  • B. 2R(? + tan ?)
  • C. R(? + cos ?)
  • D. 2R(? + cos ?)
  • E. none of these.
    • Discuss
  • 7. A river training work is generally required when the river is

  • Options
  • A. meandering
  • B. aggrading
  • C. degrading
  • D. all the above.
    • Discuss
  • 8. The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of

  • Options
  • A. reverse curve
  • B. next curve of the same order
  • C. reverse curve plus the width of the river
  • D. none of these.
    • Discuss
  • 9. The main function of a diversion head works of a canal from a river, is

  • Options
  • A. to remove silt
  • B. to control floods
  • C. to store water
  • D. to raise water level
  • E. all the above.
    • Discuss
  • 10. When a canal and a drainage approach each other at the same level, the structure so provided, is

  • Options
  • A. an aqueduct
  • B. a syphon
  • C. a level crossing
  • D. inlet and outlet.
    • Discuss

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