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Civil Engineering :: Hydraulics

  1. For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be

  2. A.

    40 cm

    B.

    41 cm

    C.

    56 cm

    D.

    60 cm

    E.

    76 cm.


  3. Equation of continuity of flow is based on the principle of conservation of

  4. A.

    mass

    B.

    momentum

    C.

    force

    D.

    none of these.

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  5. A cylindrical vessel 40 cm high is revolved about its vertical axis so that the water touches the bottom when it just spills out. If the radius of the cylinder is \(\sqrt{5}\) cm, the angular velocity of rotation, is

  6. A.

    2 rad/sec

    B.

    3 rad/sec

    C.

    4 rad/sec

    D.
    5 rad/sec
    E.

    none of these.

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  7. For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is

  8. A.
    Froude number
    B.

    Weber number

    C.

    Reynold number

    D.

    Mach number.

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  9. In Newton's viscosity equation  n = \(\mu\)\( \frac { dV } { dY }\)the coefficient (μ) is known as coefficient of

  10. A.

    viscosity

    B.

    absolute viscosity

    C.

    dynamic viscosity

    D.

    simple viscosity

    E.

    all the above.


  11. An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

  12. A.
    1.25%
    B.

    1.5%

    C.

    2.0%.

    D.
    2.5%

  13. Which one of the following equation is applicable to unsteady flow in open channels :


  14. Dimensions of the dynamic viscosity (μ) are

  15. A.
    MLT-2
    B.

    M-1L-1T-1

    C.

    ML-1T-2

    D.

    ML-1T-1.


  16. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than

  17. A.

    2.4 m

    B.

    6.4 m

    C.

    10.0 m

    D.

    5.0 m.


  18. A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is

  19. A.

    15 m

    B.

    20 m

    C.

    30 m

    D.

    40 m

    E.
    60 m.