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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is

  2. A.

     32 km

    B.

     20 km

    C.

     8 km

    D.

     4 km


  3. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will

  4. A.

     rise until its weight equals the buoyant force

    B.

     tend to move downward and it may finally sink

    C.

     float

    D.

     none of the above


  5. A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

  6. A.

     less

    B.

     more

    C.

     equal

    D.

     less at low temperature and more at high temperature


  7. A metal with specific gravity of o floating in a fluid of same specific gravity a will

  8. A.

     sink to bottom

    B.

     float over fluid

    C.

     partly immersed

    D.

     be fully immersed with top surface at fluid surface


  9. The time oscillation of a floating body with increase in metacentric height will be

  10. A.

     same

    B.

     higher

    C.

     lower

    D.

     lower/higher depending on weight of body


  11. If the surface of liquid is convex, men

  12. A.

     cohesion pressure is negligible

    B.

     cohesion pressure is decreased

    C.

     cohesion pressure is increased

    D.

     there is no cohesion pressure


  13. In series-pipe problems

  14. A.

     the head loss is same through each pipe

    B.

     the discharge is same through each pipe

    C.

     a trial solution is not necessary

    D.

     the discharge through each pipe is added to obtain total discharge


  15. An ideal flow of any fluid must fulfill the following

  16. A.

     Newton’s law of motion

    B.

     Newton’s law of viscosity

    C.

     Pascal’ law

    D.

     Continuity equation


  17. In a static fluid

  18. A.

     resistance to shear stress is small

    B.

     fluid pressure is zero

    C.

     linear deformation is small

    D.

     only normal stresses can exist


  19. The motion of air mass in a tornado is a

  20. A.

     free vortex motion

    B.

     forced vortex motion

    C.

     free vortex at center and forced vortex outside

    D.

     forced vortex at center and free vortex outside