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Chemical Engineering :: Fluid Mechanics

  1. The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.

  2. A.

     Nikuradse

    B.

     Von-Karman

    C.

     Blausius

    D.

     Colebrook


  3. Friction produced by the formation of wakes is called the __________ friction.

  4. A.

     Disk

    B.

     Skin

    C.

     Form

    D.

     None of these


  5. Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid

  6. A.

     Lies above the centroid of the plane surface

    B.

     Is independent of the specific weight of the fluid

    C.

     Is different for different fluids

    D.

     Is at the centroid of the plane surface


  7. What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta?

  8. A.

     0.64

    B.

     1.65

    C.

     0.32

    D.

     0.94


  9. Sewage sludge is an example of the __________ fluid.

  10. A.

     Bingham plastic

    B.

     Newtonion

    C.

     Pseudoplastic

    D.

     Dilatent


  11. Non-colloidal solution is an example of the __________ fluid.

  12. A.

     Non-Newtonion

    B.

     Newtonion

    C.

     Dilatent

    D.

     Pseudoplastic


  13. Fluid flow at increasing rate through a diverging pipe is an example of __________ flow.

  14. A.

     Steady uniform

    B.

     Non-steady uniform

    C.

     Steady non-uniform

    D.

     Non-steady non-uniform


  15. The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow.

  16. A.

     Steady uniform

    B.

     Steady non uniform

    C.

     Unsteady uniform

    D.

     Unsteady non uniform


  17. Gradually varying fluid flow is an example of __________ flow.

  18. A.

     Non-steady uniform

    B.

     Non-steady non-uniform

    C.

     Steady uniform

    D.

     Steady non-uniform


  19. An ideal fluid is

  20. A.

     Non-viscous

    B.

     Incompressible

    C.

     Both A & B

    D.

     Neither A & B