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Civil Engineering :: Irrigation Engineering

  1. River training for depth is achieved by

  2. A.

     groynes

    B.

     construction of dykes or leavees

    C.

     both (A) and (B)

    D.

     groynes and bandalling


  3. For designing the venturi head,

  4. A.

     Width of the throat should not be less than one-third of the bed width of main canal

    B.

     Length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal

    C.

     Minimum throat width should not be less than 60 cm

    D.

     All the above


  5. For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is

  6. A.

     Zero

    B.

     0.25

    C.

     0.50

    D.

     1.00


  7. If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be

  8. A.

     equal to rate of rainfall

    B.

     equal to infiltration capacity

    C.

     more than rate of rainfall

    D.

     more than infiltration capacity


  9. A hydraulic jump is generally formed when a stream moving with

  10. A.

     A hyper-critical velocity meets a stream moving with a critical velocity

    B.

     A hyper-critical velocity meets a stream moving with a hyper-critical velocity

    C.

     A hyper-critical velocity meets a stream moving with a sub-critical velocity

    D.

     A sub-critical velocity meets a stream moving with a hyper-critical velocity


  11. Hydrodynamic pressure due to earthquake acts at a height of

  12. A.

     3H/4π above the base

    B.

     3H/4π below the water surface

    C.

     4H/3π above the base

    D.

     4H/3π below the water surface, where H is the depth of water


  13. The maximum permissible eccentricity for no tension at the base of a gravity dam is

  14. A.

     B/2

    B.

     B/3

    C.

     B/4

    D.

     B/6


  15. The major resisting force in a gravity dam is

  16. A.

     water pressure

    B.

     wave pressure

    C.

     self-weight of dam

    D.

     uplift pressure


  17. Which of the following spillways is least suitable for an earthen dam ?

  18. A.

     ogee spillway

    B.

     chute spillway

    C.

     side channel spillway

    D.

     shaft spillway


  19. Coefficient of discharge of an ogee spillway

  20. A.

     depends on depth of approach and upstream slope

    B.

     depends on downstream apron interference and downstream submergence

    C.

     remains constant

    D.

     both (A) and (B)