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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

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

  2. A.

     N-m/s²

    B.

     N-s/m²

    C.

     Poise

    D.

     Stoke


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

  4. A.

     Pressure force

    B.

     Elastic force

    C.

     Gravity force

    D.

     Viscous force


  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


  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


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

  10. A.

     0° C

    B.

     0° K

    C.

     4° C

    D.

     20° C


  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


  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


  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


  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


  19. A large Reynold number is indication of

  20. A.

     Smooth and streamline flow

    B.

     Laminar flow

    C.

     Steady flow

    D.

     Highly turbulent flow