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Civil Engineering :: Irrigation Engineering

  1. An outlet is said to be proportional if its flexibility, is

  2. A.

     Zero

    B.

     Less than one

    C.

     More than one

    D.

     One


  3. If average particle size of the silt in millimeters is m, the Lacey's silt factor f is proportional to

  4. A.

     m3

    B.

     m1/2

    C.

     m1/3

    D.

     m2/3


  5. The Lacey's regime velocity is proportional to

  6. A.

     R1/2 S3/4

    B.

     Q3/4 S1/3

    C.

     R3/4 S1/3

    D.

     R2/3 S1/2


  7. If V₀ is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to

  8. A.

     V₀1/2

    B.

     V₀3/2

    C.

     V₀5/2

    D.

     V₀7/2


  9. Pick up the correct statement from the following

  10. A.

     Escapes are essential safety valves in a canal system

    B.

     The escapes must lead the surplus water to natural drainages

    C.

     The escapes are aligned to take advantage of contours of lower values

    D.

     All the above


  11. The net head under which the turbine reaches its peak efficiency at synchronous speed is called

  12. A.

     design head

    B.

     rated head

    C.

     gross head

    D.

     operating head


  13. If water table is comparatively high, the irrigation canal becomes useless, due to

  14. A.

     Large amount of seepage

    B.

     Water logging of the cultivated areas

    C.

     Uncertain water demand

    D.

     All the above


  15. In a concrete canal the approximate permissible velocity of water should not exceed

  16. A.

     0.5 m/sec

    B.

     1 m/sec

    C.

     1.5 m/sec

    D.

     2 m/sec


  17. The field capacity of a soil depends upon

  18. A.

     Capillary tension in soil

    B.

     Porosity of soil

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)


  19. A land is said to be water-logged if its soil pores within

  20. A.

     A depth of 40 cm are saturated

    B.

     A depth of 50 cm are saturated

    C.

     Root zone of the crops are saturated

    D.

     All the above