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Chemical Engineering :: Fluid Mechanics

  1. 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.

  2. A.

     Logarithmic

    B.

     Linear

    C.

     Hyperbolic

    D.

     Parabolic

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  3. The head developed by a centrifugal pump is largely determined by the

  4. A.

     Power of the pump

    B.

     Nature of the liquid being pumped

    C.

     Angle of the vanes and the speed of the tip of the impeller

    D.

     Vapour pressure of the liquid

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  5. Cavitation occurs in a centrifugal pump when the suction pressure is

  6. A.

     Less than the vapour pressure of the liquid at that temperature

    B.

     Greater than the vapour pressure of the liquid at that temperature

    C.

     Equal to the vapour pressure

    D.

     Equal to the developed head

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  7. Draining of shallow pits or sump is done by a sump pump, which is a __________ pump.

  8. A.

     Single stage vertical

    B.

     Centrifugal

    C.

     Plunger

    D.

     Diffuser

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  9. Specific speed for a centrifugal pump is

  10. A.

     N√Q/H3/4

    B.

     N√Q/H2/3

    C.

     N√Q/H1/4

    D.

     N√Q/H

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  11. Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an

  12. A.

     Weir

    B.

     Hot wire anemometer

    C.

     Cup and vane aneometer

    D.

     None of these

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  13. Which of the following is an undesirable property of a manometric liquid?

  14. A.

     Non-sticky & non-corrosive nature

    B.

     High vapour pressure

    C.

     Low viscosity & surface tension

    D.

     Low co-efficient of thermal expansion

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  15. Pick out the wrong statement.

  16. A.

     Momentum transfer in laminar flow results from veclocity gradient

    B.

     A fluid in equilibrium is not free from shear stress

    C.

     The viscosity of a non-Newtonion fluid is a function of temperature only

    D.

     Both B and C

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  17. Which of the following is used for pumping crude oil from oil well?

  18. A.

     Single stage centrifugal pump

    B.

     Gear pump

    C.

     Screw pump

    D.

     Duplex/triplex reciprocating pump

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

  20. A.

     Ejector

    B.

     Blower

    C.

     Injector

    D.

     Airlift

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