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Chemical Engineering :: Fluid Mechanics

  1. Air vessel fitted to a reciprocating pump

  2. A.

     Increases the work done

    B.

     Decreases the work done

    C.

     Causes cavitation

    D.

     Results in non-uniform discharge

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  3. Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.

  4. A.

     Two

    B.

     Three

    C.

     Four

    D.

     Eight

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  5. Momentum correction factor used in fluid flow problems accounts for the

  6. A.

     Change in direction of flow

    B.

     Change in total energy

    C.

     Change in pressure

    D.

     Non uniform direction of velocities at inlet & outlet sections

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  7. What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?

  8. A.

     0.5

    B.

     1

    C.

     1.5

    D.

     2

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  9. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?

  10. A.

     0.5

    B.

     0.67

    C.

     1

    D.

     2

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  11. Deformation drag, which is caused by widespread deformation of fluid around the immersed body

  12. A.

     Occurs when NRe is very small

    B.

     Is primarily a friction drag

    C.

     Is independent of body length

    D.

     Depends mainly on cross-sectional shape

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  13. For an ideal fluid flow, Reynolds number is

  14. A.

     2100

    B.

     100

    C.

     0

    D.

     ∞

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  15. For ideally incompressible fluid, the Mach number will be

  16. A.

     1.5

    B.

     1

    C.

     0

    D.

     5

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  17. Ratio of pressure and inertia force gives __________ number.

  18. A.

     Weber

    B.

     Mach

    C.

     Euler

    D.

     Froude

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  19. Froude number is not a factor

  20. A.

     For Reynolds number greater than 300

    B.

     When there is no vortex formation

    C.

     For unbaffled tank

    D.

     None of these

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