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  • Question

  • 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.

  • Correct Answer
  • free board 

    • Irrigation problems

    Search Results

    • 1. 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 design of a retaining wall assumes that the retained earth

    • Options
    • A. is dry
    • B. is free from moisture
    • C. is not cohesives
    • D. consists of granular particles
    • E. all the above.
      • Discuss
    • 3. If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is

    • Options
    • A. 2800/C
    • B. 2300/2C
    • C. 2800/3C
    • D. 2800/C2
      • Discuss
    • 4. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

    • Options
    • A. 5 kg/cm2
    • B. 10 kg/cm2
    • C. 15 kg/cm2
    • D. 20 kg/cm2
    • E. 25 kg/cm2
      • Discuss
    • 5. Cantilever retaining walls can safely be used for a height not more than

    • Options
    • A. 3 m
    • B. 4 m
    • C. 5 m
    • D. 6 m
    • E. 8 m
      • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. A river training work is generally required when the river is

    • Options
    • A. meandering
    • B. aggrading
    • C. degrading
    • D. all the above.
      • Discuss

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