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Chemical Engineering :: Fluid Mechanics

  1. Hydraulic __________ works on the principle of Pascal's law of transmission of fluid pressure.

  2. A.
    press
    B.
    turbine
    C.
    pump
    D.
    coupling

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  3. A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is

  4. A.
    Δp
    B.
    < Δp
    C.
    > Δp
    D.
    Δp2

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  5. The contraction co-efficient for Borda's mouthpiece (for frictionless fluid) is

  6. A.
    0.1
    B.
    0.5
    C.
    0.94
    D.
    1

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  7. Purpose of air lift pump is to

  8. A.
    compress air.
    B.
    lift compressed air.
    C.
    lift water from a well by using compressed air.
    D.
    lift air under negative pressure.

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  9. Pick out the correct statement pertaining to venturimeter.

  10. A.
    A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward.
    B.
    The co-efficient of contraction of a venturimeter is always unity.
    C.
    For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected.
    D.
    none of these.

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  11. For very low pressure and high discharge rate, the compressor used is a/an __________ compressor.

  12. A.
    axial
    B.
    reciprocating
    C.
    rotary
    D.
    none of these

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  13. Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.

  14. A.
    piston
    B.
    gear
    C.
    positive displacement
    D.
    sump

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  15. The main factor on which the behaviour of a mass of fluidised solid depends mainly is the

  16. A.
    fluid characteristics
    B.
    particle size
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

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  17. What is the speed of sound (m/sec) in ordinary water ?

  18. A.
    1500
    B.
    330
    C.
    1000
    D.
    3000

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  19. Two piping system are said to be equivalent, when the __________ are same.

  20. A.
    fluid flow rate & friction loss
    B.
    length & friction factor
    C.
    diameter & friction factor
    D.
    length & diameter

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