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Civil Engineering :: Irrigation

  1. The scour depth D of a river during flood, may be calculated from the Lacey's equation

  2. A.

    D = 0.47  \([\frac { Q} { f} ]\)

    B.

    D = 0.47 \([\frac { Q} { f} ]^1/2\)

    C.

    D = 0.47\([\frac { Q} { f} ]^1/3\)

    D.

    D = 0.47 \([\frac { Q} { f} ]^2/3\)


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

  4. A.

    B.

    C.

    D.

    E.

    V0 


  5. The useful moisture of soil, is equal to its

  6. A.

    field capacity

    B.

    saturation capacity

    C.

    moisture content at permanent wilting point

    D.
    difference between filed capacity and permanent wilting point within the root zone of plants.

  7. Canals taken off from ice-fed perennial rivers, are known

  8. A.

    permanent canals

    B.
    ridge canals
    C.
    perennial canals
    D.
    inundation canals
    E.
    ice canals.

  9. The down stream expansion head of a guide bank is extended to subtend an angle at the centre, equal to

  10. A.

    30°

    B.
    45°
    C.

    60

    D.
    90°

  11. Trial procedure of canal design by Kennedy's theory is based upon the equation

  12. A.
    Q = A . Y
    B.

    V =\(\frac { 23+1/N+0.00155/8} { 1+(23+0.00155/s)N/\sqrt{R} } \).\(\sqrt{RS}\)

    C.

    V =\(\frac { 23+1/N+0.00155/8} { 1+(23+0.00155/s)N/\sqrt{R} } \).\(\sqrt{RS}\)

    D.

    all the above


  13. The main cause of silting up a channel,

  14. A.

    non-regime section

    B.

    inadequate slope

    C.

    defective head regulator

    D.

    defective outlets

    E.

    all the above.


  15. In north Indian Plains, optimum depth of kor watering for wheat, is

  16. A.

    23.0 cm

    B.

    19.0 cm

    C.

    17.5 cm

    D.

    13.5 cm

    E.

    12.0 cm


  17.  

    Bed bars in a canal are provided

  18. A.

    to watch the general behaviour of canal

    B.

    to measure the discharge

    C.

    to raise the supply level

    D.

    to control the silting

    E.

    all the above.


  19. The most suitable location of a canal head work, is

  20. A.

    boulders stage of the riverdelta stage of the river

    B.

    delta stage of the river

    C.

    rock stage of the river

    D.

    trough stage of the river.