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Chemical Engineering :: Fluid Mechanics

  1. The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is

  2. A.
    0.5
    B.
    1
    C.
    2
    D.
    0.33

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  3. For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.

  4. A.
    logarithmic
    B.
    linear
    C.
    hyperbolic
    D.
    parabolic

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  5. Maintenance cost of a __________ pump for a particular duty is the least.

  6. A.
    centrifugal
    B.
    reciprocating
    C.
    volute
    D.
    gear

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  7. Choking in case of pipe flow means that a

  8. A.
    specified mass flow rate can not be achieved.
    B.
    valve is closed in the line.
    C.
    restriction in flow cross-section area occurs.
    D.
    none of these.

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  9. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

  10. A.
    thermal conductivity
    B.
    electrical conductivity
    C.
    specific gravity
    D.
    electrical resistivity

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  11. The nominal size of a hose pipe is specified by its

  12. A.
    I.D.
    B.
    O.D.
    C.
    thickness
    D.
    none of these

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  13. Transition from laminar flow to turbulent flow is aided by the

  14. A.
    surface roughness and curvature (i.e.sharp corners).
    B.
    vibration.
    C.
    pressure gradient and the compressibility of the flowing medium.
    D.
    all (a), (b) & (c).

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  15. For flow of fluids through packed bed, the superficial velocity is

  16. A.
    less than the average velocity through channels.
    B.
    more than the average velocity through channels.
    C.
    dependent on the pressure drop across the bed.
    D.
    same as the average velocity through channels.

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  17. Cd is always __________ Cc.

  18. A.
    greater than
    B.
    less than
    C.
    equal to
    D.
    either more or less than

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  19. Buoyant force

  20. A.
    for non-symmetrical bodies is not vertical.
    B.
    depends on the depth of the submergence of the floating body.
    C.
    depends on the weight of the floating body.
    D.
    none of these.

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