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Chemical Engineering :: Fluid Mechanics

  1. Which of the following is not a dimension-less parameter?

  2. A.

     Pressure-co-efficient

    B.

     Froude number

    C.

     Kinematic viscosity

    D.

     Weber number


  3. The continuity equation

  4. A.

     Relates mass flow rate along a stream tube

    B.

     Relates work and energy

    C.

     Stipulates that Newton's second law of motion must be satisfied at every point in the fluid

    D.

     None of these


  5. Bernoulli's equation is not applicable, when the flow is

  6. A.

     Irrotational

    B.

     Incompressible

    C.

     Viscous

    D.

     All of the above


  7. Permanent pressure loss in a well designed venturimeter is about __________ percent of the venturi differential.

  8. A.

     1

    B.

     10

    C.

     30

    D.

     50


  9. The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.

  10. A.

     Hyperbola

    B.

     Parabola

    C.

     Semi-circle

    D.

     Semi-ellipse


  11. For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

  12. A.

     2

    B.

     <2

    C.

     >2

    D.

     1/2


  13. Specific speed of a centrifugal pump relates it with another pump having the

  14. A.

     Dynamic similarity

    B.

     Same efficiency

    C.

     Same speed

    D.

     Geometrical similarity


  15. High specific speed of a pump implies that, it is a/an __________ pump.

  16. A.

     Centrifugal

    B.

     Mixed flow

    C.

     Axial flow

    D.

     None of these


  17. Low specific speed of a pump implies that, it is a/an __________ pump.

  18. A.

     Axial flow

    B.

     Centrifugal

    C.

     Mixed flow

    D.

     None of these


  19. The temperature in isentropic flow

  20. A.

     Does not depend on Mach number

    B.

     Depends on Mach number only

    C.

     Cannot drop and then increase again downstream

    D.

     None of these