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Chemical Engineering :: Fluid Mechanics

  1. Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation ?
    1. Fluid flow is frictionless & irrotational.
    2. Fluid flow is steady.
    3. Fluid flow is uniform & turbulent.
    4. Fluid is compressible.
    5. Fluid is incompressible.

  2. A.

     1, 3, 3

    B.

     2, 3, 4

    C.

     1, 2, 4

    D.

     1, 3, 4


  3. For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is

  4. A.

     1

    B.

     0

    C.

     < 1

    D.

     > 1


  5. Sewage sludge is __________ type of non-Newtonion fluid.

  6. A.

     Dilatant

    B.

     Bingham plastic

    C.

     Pseudo plastic

    D.

     None of these


  7. __________ pumps are axial flow pumps.

  8. A.

     Turbine

    B.

     Propeller

    C.

     Diffuser

    D.

     None of these


  9. Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.

  10. A.

     Increase

    B.

     Decrease

    C.

     Not change

    D.

     Exponentially decrease


  11. The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.

  12. A.

     Directly proportional to

    B.

     Directly proportional to square of

    C.

     Inversely proportional to

    D.

     Inversely proportional to square of


  13. A pitched-blade turbine draws __________ a straight blade turbine.

  14. A.

     Less power than

    B.

     More power than

    C.

     Same power as

    D.

     Data insufficient to predict


  15. Viscosity of a liquid decreases __________ with rise in temperature.

  16. A.

     Exponentially

    B.

     Linearly

    C.

     Logarithmically

    D.

     None of these


  17. In isotropic turbulence, the __________ are equal to each other.

  18. A.

     Temporal velocity components

    B.

     Mean square of velocity fluctuations in the three co-ordinate directions

    C.

     Root mean square of velocity fluctuations in the three co-ordinate directions

    D.

     None of these


  19. Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.

  20. A.

     Total pressure

    B.

     Total energy

    C.

     Velocity head

    D.

     None of these