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Chemical Engineering :: Fluid Mechanics

  1. Mach number is the ratio of the speed of the

  2. A.

     Fluid to that of the light

    B.

     Light to that of the fluid

    C.

     Fluid to that of the sound

    D.

     Sound to that of the fluid


  3. Which of the following valves will incur maximum pressure drop for the same discharge of water?

  4. A.

     Globe valve

    B.

     Gate valve

    C.

     Needle valve

    D.

     Butterfly valve


  5. If more than two branches of pipes are to be connected at the same point, then use a/an

  6. A.

     Elbow

    B.

     Union

    C.

     Tee

    D.

     None of these


  7. Which law is followed by the velocity distribution in the turbulent boundary layer?

  8. A.

     Parabolic law

    B.

     Linear law

    C.

     Logarithmic law

    D.

     None of these


  9. With increase in temperature, the vapor pressure of liquids

  10. A.

     Increases

    B.

     Increases linearly

    C.

     Decreases

    D.

     Remains constant


  11. Kinetic energy of fluid per unit weight represented by the velocity head is given by

  12. A.

     2v²/gc

    B.

     v²/2gc

    C.

     ρv²/gc

    D.

     ρ.v²/2gc


  13. A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is

  14. A.

     25.61 kPa

    B.

     11.77 kPa

    C.

     14.86 kPa

    D.

     21.13 kPa


  15. Which of the following is most prone to pulsating discharge flow ?

  16. A.

     Centrifugal pump

    B.

     Reciprocating pump

    C.

     Gear pump

    D.

     Axial flow pump


  17. Fanning friction factor equation applies to the __________ fluid flow.

  18. A.

     Non-isothermal condition of

    B.

     Compressible

    C.

     Both A and B

    D.

     Neither A nor B


  19. Most commonly used joint in the underground pipe lines is the

  20. A.

     Sleevejoint

    B.

     Coupling

    C.

     Flange

    D.

     Expansion joint