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Chemical Engineering :: Fluid Mechanics

  1. The most economical flow control valve for use with large diameter pipes is a

  2. A.

     Butterfly valve

    B.

     Globe valve

    C.

     Needle valve

    D.

     None of these

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  3. Two dimensional stream function

  4. A.

     Relates velocity and pressure

    B.

     Is constant along a stream line

    C.

     Is constant along an equipotential surface

    D.

     None of these

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  5. Rubber latex is an example of a __________ .fluid.

  6. A.

     Pseudoplastic

    B.

     Bingham plastic

    C.

     Dilatent

    D.

     Newtonion

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  7. __________ is an example of axial flow impeller.

  8. A.

     Paddle

    B.

     Turbine

    C.

     Propeller

    D.

     All of the above

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  9. Water is flowing at 1 m/sec through a pipe (of 10 cm I.D) with a right angle bend. The force in Newtons exerted on the bend by water is

  10. A.

     10√2π

    B.

     5π/2

    C.

     5√2π

    D.

     5π/√2

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  11. The unit of bulk modulus of elasticity for a liquid in S.I. unit is

  12. A.

     N

    B.

     N/m

    C.

     N/m²

    D.

     N/m³

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  13. The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a

  14. A.

     Weir

    B.

     Pitot tube

    C.

     Kennison nozzle

    D.

     V-notch

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  15. Slurries can be most conveniently pumped by a __________ pump.

  16. A.

     Screw

    B.

     Reciprocating

    C.

     Gear

    D.

     Centrifugal

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  17. Medium viscosity lubricating oil can be most ideally pumped by a __________ pump.

  18. A.

     Vane

    B.

     Piston

    C.

     Centrifugal

    D.

     Plunger

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  19. Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will

  20. A.

     Increase

    B.

     Decrease

    C.

     Remain same

    D.

     Data insufficient to predict pressure drop

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