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Chemical Engineering :: Fluid Mechanics

  1. Forces acting on a particle settling in fluid are __________ forces.

  2. A.
    gravitational & buoyant.
    B.
    centrifugal & drag.
    C.
    gravitational or centrifugal buoyant drag.
    D.
    external, drag & viscous.

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  3. For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the

  4. A.
    square of the radial distance.
    B.
    radial distance linearly.
    C.
    inverse of the radial distance.
    D.
    elevation along vertical direction.

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  5. In a dry packed bed, the pressure drop will be changed by increasing the flow rate as

  6. A.
    V1.8
    B.
    V-0.8
    C.
    V
    D.
    V-1

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  7. Specific speed of a centrifugal pump depends upon the __________ head.

  8. A.
    suction
    B.
    delivery
    C.
    manometric
    D.
    none of these

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  9. Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.

  10. A.
    non-viscous
    B.
    viscous
    C.
    turbulent
    D.
    rotational

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  11. The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.

  12. A.
    0.25
    B.
    0.5
    C.
    0.66
    D.
    0.95

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  13. When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an

  14. A.
    ejector
    B.
    blower
    C.
    injector
    D.
    airlift

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  15. Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will

  16. A.
    increase
    B.
    decrease
    C.
    remain unchanged
    D.
    data insufficient to predict relative pressure drop.

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  17. What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5) ?

  18. A.
    0.61 - 0.63
    B.
    0.5 - 0.75
    C.
    0.75 - 0.90
    D.
    0.35 - 0.55

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  19. A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

  20. A.
    0.01
    B.
    0.1
    C.
    1
    D.
    10

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