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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. True one-dimensional flow occurs when

  2. A.

     the direction and magnitude of the veiocity at all points are identical

    B.

     the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

    C.

     the magnitude and direction of the velocity do not change from point to point in the fluid

    D.

     the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane


  3. Non uniform flow occurs when

  4. A.

     the direction and magnitude of the velocity at all points are identical

    B.

     the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

    C.

     the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

    D.

     velocity, depth, pressure, etc. change from point to point in the fluid flow.


  5. In a Sutro weir, the discharge is proportional to (where H is head)

  6. A.

     H1/2

    B.

     H3/2

    C.

     H5/2

    D.

     H


  7. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

  8. A.

     specific weight

    B.

     specific mass

    C.

     specific gravity

    D.

     specific density


  9. Free surface of a liquid tends to contract to the smallest possible area due to force of

  10. A.

     surface tension

    B.

     viscosity

    C.

     friction

    D.

     cohesion


  11. A perfect gas

  12. A.

     has constant viscosity

    B.

     is incompressible

    C.

     is of theoretical interest

    D.

     none of the above.


  13. For a floating body to be in stable equilibrium, its metacentre should be

  14. A.

     below the center of buoyancy

    B.

     above the center of buoyancy

    C.

     between e.g. and center of pressure

    D.

     above the center of gravity.


  15. The resultant of all normal pressures acts

  16. A.

     at e.g. of body

    B.

     at center of pressure

    C.

     vertically upwards

    D.

     at metacentre


  17. Pressure of the order of 10''' torr can be measured by

  18. A.

     Bourdon tube

    B.

     Pirani Gauge

    C.

     micro-manometer

    D.

     ionisastion gauge


  19. Flow of water in a pipe about 3 meters in diameter can be measured by

  20. A.

     orifice plate

    B.

     venturi

    C.

     rotameter

    D.

     pitot tube