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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is

  2. A.

     d > m > e

    B.

     d > e > m

    C.

     e > m > d

    D.

     e > d > m


  3. The velocity distribution for laminar flow through a circular tube

  4. A.

     is constant over the cross-section

    B.

     varies linearly from zero at walls to maximum at centre

    C.

     varies parabolically with maximum at the centre

    D.

     none of the above


  5. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

  6. A.

     adhesion

    B.

     cohesion

    C.

     viscosity

    D.

     compressibility


  7. The flow in which each liquid particle has a definite path and their paths do not cross each other is called

  8. A.

     one dimensional flow

    B.

     uniform flow

    C.

     turbulent flow

    D.

     streamline flow


  9. If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

  10. A.

     h

    B.

     wh

    C.

     w/h

    D.

     h/w


  11. All the terms of energy in Bernoulli’s equation have dimension of

  12. A.

     energy

    B.

     work

    C.

     mass

    D.

     length


  13. The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

  14. A.

     0.423 D

    B.

     0.577 D

    C.

     0.223 D

    D.

     0.707 D


  15. For a body floating in a liquid the normal pressure exerted by the liquid acts at

  16. A.

     bottom surface of the body

    B.

     e.g. of the body

    C.

     metacentre

    D.

     all points on the surface of the body


  17. For hypersonic flow, the Mach number is

  18. A.

     unity

    B.

     greater than unity

    C.

     greater than 2

    D.

     greater than 4


  19. Metacentric height is the distance between the metacentre and

  20. A.

     water surface

    B.

     center of pressure

    C.

     center of gravity

    D.

     center of buoyancy