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Chemical Engineering :: Fluid Mechanics

  1. __________ forces do not act in case of fluid flow.

  2. A.

     Elastic

    B.

     Tensile

    C.

     Vibratory

    D.

     Centrifugal


  3. Which of the following is not an advantage of fluidisation from transfer operation point of view?

  4. A.

     Intimate contact of the fluid with all parts of the solid particles

    B.

     Lower fluid pumping power requirement

    C.

     Minimisation of temperature variation

    D.

     Prevention of particle seggregation


  5. Dimension of absolute viscosity is

  6. A.

     ML⁻¹T⁻¹

    B.

     MLT⁻¹

    C.

     ML⁻¹T

    D.

     MLT


  7. One dimensional fluid flow implies the

  8. A.

     Flow in straight lines only

    B.

     Uniform flow

    C.

     Steady uniform flow

    D.

     Flow in which transverse components are zero


  9. Molten soap mass is transported by a __________ pump.

  10. A.

     Diaphragm

    B.

     Reciprocating

    C.

     Gear

    D.

     Centrifugal


  11. Equivalent length of a pipe fitting is

  12. A.

     Dependent on Reynolds number

    B.

     Independent of Reynolds number

    C.

     Dependent on the length of the pipe

    D.

     None of these


  13. Pick out the correct statement pertaining to venturimeter.

  14. A.

     A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward

    B.

     The co-efficient of contraction of a venturimeter is always unity

    C.

     For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected

    D.

     None of these


  15. With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost

  16. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Increases exponentially


  17. Self-priming centrifugal pump can be used for

  18. A.

     Booster service

    B.

     Pumping liquid fertilisers (e.g. liquid NH₃)

    C.

     Pumping industrial wastes

    D.

     All of the above


  19. For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to(where, μ = fluid viscosity )

  20. A.

     μ

    B.

     1/μ

    C.

     √μ

    D.

     1/√μ