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Civil Engineering :: Hydraulics

  1. Pick up the correct statement from the following :

  2. A.

    Discharge over a triangular notch is proportional to H5/2

    B.

    Discharge over a rectangular notch is proportional to H3/2

    C.

    Both (a) and (b)

    D.

    Neither (a) nor (b).


  3. The flow in open channel is said to be subcritical if the Froude number is

  4. A.

    less than 1.0

    B.
    equal to 1.0
    C.
    greater than 1.0
    D.

    none.


  5. In C.G.S. system the unit of visocity is

  6. A.

    dyne

    B.

    joule

    C.
    poise
    D.

    Newton

    E.

    none of these.


  7. The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is

  8. A.

    1/2

    B.
    2/3
    C.

    3/2

    D.
    3/4

  9. In steady flow, which one of the following changes with time

  10. A.
    velocity
    B.

    pressure

    C.

    density

    D.

    none of these.


  11. The notch angle for maximum discharge over a triangular notch, is

  12. A.

    30°

    B.

    60°

    C.

    90°

    D.

    120°


  13. In an inclined pipe, the pressure difference at its two ends is due to

  14. A.
    sudden head drop at inlet
    B.
    exit head drop
    C.

    frictional loss head

    D.

    elevation head

    E.

    all the above.


  15. Weber number is the ratio of inertia force to

  16. A.

    surface tension

    B.

    gravitational force

    C.

    elasticity

    D.

    viscosity.


  17. Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is

  18. A.

    more in the internal mouth piece

    B.
    less in the internal mouth piece
    C.

    equal to external mouth piece

    D.

    none of these.


  19. The width of a weir with end contraction, is

  20. A.

    equal to the width of the channel

    B.

    less than the width of the channel

    C.

    half the width of the channel

    D.

    none of these.