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Chemical Engineering :: Fluid Mechanics

  1. Velocity at a certain point in case of streamline flow is

  2. A.

     Constant

    B.

     Independent of time

    C.

     Both A & B

    D.

     Neither A nor B

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  3. Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m³, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is

  4. A.

     90

    B.

     60

    C.

     45

    D.

     30

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  5. In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?

  6. A.

     Rotational

    B.

     Unsteady

    C.

     Turbulent

    D.

     Non-uniform

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  7. If the head over the triangular notch is doubled, the discharge will increase by __________ times.

  8. A.

     2

    B.

     2.828

    C.

     5.657

    D.

     4

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  9. Which of the following pipe bends will incur the largest head loss ?

  10. A.

     U-bend

    B.

     30° bend

    C.

     45° bend

    D.

     90° bend

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  11. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.

  12. A.

     Bingham

    B.

     Newtonion

    C.

     Perfect

    D.

     None of these

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  13. The distance between metacentre and __________ is called metacentric height.

  14. A.

     Water surface

    B.

     Centre of gravity

    C.

     Centre of buoyancy

    D.

     None of these

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  15. The __________ pressure is measured by a static tube.

  16. A.

     Dynamic

    B.

     Static

    C.

     Total

    D.

     None of these

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  17. Boiler feed water pump is usually a __________ pump.

  18. A.

     Reciprocating

    B.

     Gear

    C.

     Multistage centrifugal

    D.

     Diaphragm

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  19. Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is

  20. A.

     Q/2

    B.

     Q/4

    C.

     Q/8

    D.

     Q/16

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