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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The unit of dynamic viscosity in S.I. units is

  2. A.

     N-m/s²

    B.

     N-s/m²

    C.

     Poise

    D.

     Stoke

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  3. Reynold's number is the ratio of inertia force to

  4. A.

     Pressure force

    B.

     Elastic force

    C.

     Gravity force

    D.

     Viscous force

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  5. Froude's number is the ratio of inertia force to

  6. A.

     Pressure force

    B.

     Elastic force

    C.

     Gravity force

    D.

     Surface tension force

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  7. The maximum number of jets, generally, employed in an impulse turbine without jet interference are

  8. A.

     Two

    B.

     Four

    C.

     Six

    D.

     Eight

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  9. The density of water is 1000 kg/m3 at

  10. A.

     0° C

    B.

     0° K

    C.

     4° C

    D.

     20° C

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  11. A hydraulic press is a device used

  12. A.

     To store pressure energy which may be supplied to a machine later on

    B.

     To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure

    C.

     To lift larger load by the application of a comparatively much smaller force

    D.

     All of the above

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  13. The flow of water through the hole in the bottom of a wash basin is an example of

  14. A.

     Steady flow

    B.

     Uniform flow

    C.

     Free vortex

    D.

     Forced vortex

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  15. Motion of a liquid in a volute casing of a centrifugal pump is an example of

  16. A.

     Rotational flow

    B.

     Radial

    C.

     Forced spiral vortex flow

    D.

     Spiral vortex flow

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  17. The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

  18. A.

     5 mm

    B.

     10 mm

    C.

     20 mm

    D.

     30 mm

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  19. A large Reynold number is indication of

  20. A.

     Smooth and streamline flow

    B.

     Laminar flow

    C.

     Steady flow

    D.

     Highly turbulent flow

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