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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. A streamline is defined as the line

  2. A.

     parallel to central axis flow

    B.

     parallel to outer surface of pipe

    C.

     of equal yelocity in a flow

    D.

     along which the pressure drop is uniform

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  3. The two important forces for a floating body are

  4. A.

     buoyancy, gravity

    B.

     buoyancy, pressure

    C.

     buoyancy, inertial

    D.

     inertial, gravity

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  5. The conditions for the stable equilibrium of a floating body are

  6. A.

     the meta-center should lie above the center of gravity

    B.

     the center of buoyancy and the center of gravity must lie on the same vertical line

    C.

     a righting couple should be formed

    D.

     all the above are correct

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  7. A one dimensional flow is one which

  8. A.

     is uniform flow

    B.

     is steady uniform flow

    C.

     takes place in straight lines

    D.

     involves zero transverse component of flow

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  9. The upper surface of a weir over which water flows is known is

  10. A.

     crest

    B.

     nappe

    C.

     sill

    D.

     weir top

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  11. In the case of steady flow of a fluid, the acceleration of any fluid particle is

  12. A.

     constant

    B.

     variable

    C.

     zero

    D.

     zero under limiting conditions

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  13. Ratio of inertia force to elastic force is known as

  14. A.

     Mach number

    B.

     Froude number

    C.

     Reynold’s number

    D.

     Weber’s number

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  15. The major loss of energy in long pipes is due to

  16. A.

     sudden enlargement

    B.

     sudden contraction

    C.

     gradual contraction or enlargement

    D.

     friction

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  17. For very great pressures, viscosity of moss gases and liquids

  18. A.

     remains same

    B.

     increases

    C.

     decreases

    D.

     shows erratic behaviour

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  19. Which of the following manometer has highest sensitivity

  20. A.

     U-tube with water

    B.

     inclined U-tube

    C.

     U-tube with mercury

    D.

     micro-manometer with water

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