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Chemical Engineering :: Process Equipment and Plant Design

  1. In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

  2. A.
    2.5
    B.
    7.5
    C.
    15
    D.
    20

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  3. Which of the following lengths of heat exchanger tubes are normally not used in practice ?

  4. A.
    2.5 metres
    B.
    6 metres
    C.
    10 metres
    D.
    0.5 metre

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  5. A pipe is generally made of circular cross-section, because a circular cross-section has the

  6. A.
    higher structural strength.
    B.
    lowest surface area requirement for a given volume.
    C.
    both (a) & (b).
    D.
    none of these.

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  7. In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

  8. A.
    1000
    B.
    3000
    C.
    5000
    D.
    10000

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  9. Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be

  10. A.
    d
    B.
    d
    C.
    d
    D.
    2d

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  11. A cylindrical storage tank can have a self supported conical roof,

  12. A.
    if its diameter is less than 15-20metres.
    B.
    if its diameter is more than 50 meters.
    C.
    if the thickness of the roof is more than that of the cylindrical shell.
    D.
    irrespective of its diameter.

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  13. For high pressure process equipments/vessels, the connected nozzle should be

  14. A.
    welded
    B.
    screwed
    C.
    flanged
    D.
    brazed

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  15. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

  16. A.
    relative volatility is close to one (e.g., separation of close boiling isomers).
    B.
    feed is not at its bubble point.
    C.
    number of equilibrium stages in only stripping section is to be calculated.
    D.
    number of equilibrium stages required is likely to be very small.

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  17. Column support for the roof of cylindrical storage tank must be provided for

  18. A.
    small diameter tanks.
    B.
    large diameter tanks.
    C.
    small diameter tall tanks.
    D.
    all tanks irrespective of their heights and diameters.

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  19. For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?

  20. A.
    hemispherical
    B.
    ellipsoidal (2 : 1)
    C.
    conical
    D.
    flat plate

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