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Chemical Engineering :: Fluid Mechanics

  1. Glass pipes can be joined by

  2. A.
    flanges
    B.
    welding
    C.
    soldering
    D.
    bell and spigot joint

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  3. If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is

  4. A.
    same in both the tubes.
    B.
    greater in 1 mm dia tube.
    C.
    greater in 0.5 mm dia tube.
    D.
    zero in both the tubes.

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  5. For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

  6. A.
    2
    B.
    <2
    C.
    >2
    D.
    1/2

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  7. Weber number is the ratio of inertial force to __________ force.

  8. A.
    surface tension
    B.
    gravity
    C.
    viscous
    D.
    elastic

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  9. The curve of metacentre for a floating body __________ the curve of buoyancy.

  10. A.
    is always below
    B.
    is the evolute of
    C.
    intersects at right angle
    D.
    is tangential to

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  11. At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?

  12. A.
    40° and 140°
    B.
    45° and 60°
    C.
    90° and 80°
    D.
    20° and 120°

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  13. The range of a particular rotameter can be increased by

  14. A.
    use of floats of different densities.
    B.
    no means.
    C.
    increasing the diameter of the float.
    D.
    decreasing the diameter of the float.

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  15. Which of the following is dimensionless ?

  16. A.
    Angular velocity
    B.
    Fanning friction factor
    C.
    Specific volume
    D.
    None of these

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  17. A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is __________ litres.

  18. A.
    600
    B.
    660
    C.
    1.1
    D.
    60

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  19. A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.

  20. A.
    sump
    B.
    volute
    C.
    vacuum
    D.
    submerged

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