Home / Chemical Engineering / Fluid Mechanics :: Section-17

Chemical Engineering :: Fluid Mechanics

  1. Multistage centrifugal pumps are generally used for

  2. A.

     High head

    B.

     Low head but high discharge

    C.

     Highly viscous liquid

    D.

     Slurries of high solid concentration


  3. Remote control valve is a __________ valve.

  4. A.

     Gate

    B.

     Butterfly

    C.

     Needle

    D.

     Globe


  5. A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

  6. A.

     Develops a lower head

    B.

     Capacity is reduced

    C.

     Requires more power

    D.

     All of the above


  7. All pipes of a particular nominal size have the same

  8. A.

     Inside diameter

    B.

     Outside diameter

    C.

     Thickness

    D.

     None of these


  9. In fluid flow, the boundary layer separation can not occur

  10. A.

     In case of boundaries experiencing form drag

    B.

     At points of abrupt changes in the flow directions

    C.

     In laminar flow

    D.

     None of these


  11. At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump?

  12. A.

     40° and 140°

    B.

     45° and 60°

    C.

     90° and 80°

    D.

     20° and 120°


  13. Select the correct practical example of steady non-uniform flow.

  14. A.

     Motion of water around a ship in a lake

    B.

     Motion of river around bridge piers

    C.

     Steadily decreasing flow through a reducing section

    D.

     Steadily increasing flow through a pipe


  15. In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.

  16. A.

     Manometric

    B.

     Mechanical

    C.

     Volumetric

    D.

     Overall


  17. __________ isused for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline.

  18. A.

     Venturimeter

    B.

     Pressure gauge

    C.

     Pitot tube

    D.

     Orificemeter


  19. Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively).

  20. A.

     FL⁻²T, ML⁻¹T⁻¹

    B.

     FLT, ML⁻¹T⁻¹

    C.

     ML⁻¹T⁻³, F⁻¹L²T

    D.

     F-1L²T⁻¹, MLT⁻³