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Chemical Engineering :: Fluid Mechanics

  1. Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a

  2. A.

     Pitot tube

    B.

     Manometer

    C.

     Rotameter

    D.

     None of these


  3. A fluid element has a velocity V = -y² . xi + 2yx² . j. The motion at (x, y) = (l/√2, 1) is

  4. A.

     Rotational and incompressible

    B.

     Rotational and compressible

    C.

     Irrotational and compressible

    D.

     Irrotational and incompressible


  5. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is

  6. A.

     More

    B.

     Less

    C.

     Equal

    D.

     Independent of porosity


  7. Bernoulli's equation describes the

  8. A.

     Mechanical energy balance in potential flow

    B.

     Kinetic energy balance in laminar flow

    C.

     Mechanical energy balance in turbulent flow

    D.

     Mechanical energy balance in boundary layer


  9. Air vessel provided in a reciprocating pump

  10. A.

     Smoothens the flow by avoiding pulsations

    B.

     Increases the volumetric efficiency of the pump

    C.

     Saves the pump from the danger of cavitation

    D.

     None of these


  11. With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the

  12. A.

     Velocity increases

    B.

     Pressure decreases

    C.

     Both A and B

    D.

     Neither A nor B


  13. The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is

  14. A.

     Hyperbolic

    B.

     Parabolic

    C.

     Linear

    D.

     None of these


  15. In which of the following cases, it is possible for flow to occur from low pressure to high pressure?

  16. A.

     Flow of liquid upward in a vertical pipe

    B.

     Flow through a converging section

    C.

     Flow of air downward in a pipe

    D.

     Impossible in a constant cross-section conduit


  17. The velocity profile for turbulent flow through a closed conduit is

  18. A.

     Logarithmic

    B.

     Parabolic

    C.

     Hyperbolic

    D.

     Linear


  19. For laminar flow of Newtonion fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship.

  20. A.

     Logarithmic

    B.

     Parabolic

    C.

     Hyperbolic

    D.

     Linear