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Civil Engineering :: Hydraulics

  1. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be

  2. A.
    2.48 m
    B.
    2.49 m
    C.

    2.50 m

    D.

    2.51 m.


  3. For a most economical trapezoidal open channel, the half of the top width must be equal to

  4. A.

    the bed width

    B.

    one sloping side

    C.
    the depth of flow
    D.

    None of these.


  5. Pick up the correct statement regarding convergent divergent mouth piece from the following :

  6. A.

    It converges upto Venacontracta and then diverges

    B.

    In this mouth piece there is no loss of energy due to sudden enlargement

    C.

    The coefficient of discharge is unity

    D.

    All the above.


  7. The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is

  8. A.
    0.5
    B.

    1.0

    C.

    1.5

    D.

    2.0

    E.

    2.5


  9. The formula Q = m x L x \(\sqrt{2g}\)H3/2 where m = 0.405+\(\frac { 0.003 } {H }\) was suggested by :

  10. A.

    Bazin

    B.

    Francis

    C.
    Cipolletti
    D.

    None of these.


  11. One metric slug is equal to

  12. A.

    1 kg wt

    B.
    9.81 kg wt
    C.

    9.81 kg mass

    D.

    0.98 kg wt.


  13. Falling drops of water become spheres due to

  14. A.

    adhesion

    B.

    cohesion

    C.

    surface tension

    D.
    viscosity.

  15. The most efficient channel section, is

  16. A.

    semi-circular

    B.

    rectangular

    C.
    triangular
    D.

    half hexagon in the form of trapezoid.


  17.  

    With a clinging nappe of a weir, the excess discharge, is

  18. A.

    6% to 7%

    B.

    8% to 10%

    C.

    18% to 20%

    D.

    25% to 30%

    E.

    30% to 40%.


  19.  

    For steady flow in open channels, which one of the following does not change :

  20. A.

    depth of flow

    B.

    velocity of flow

    C.
    rate of flow
    D.
    All of these.