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Chemical Engineering :: Process Equipment and Plant Design

  1. Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure ?

  2. A.
    At the inner surface.
    B.
    At the mid thickness of the cylindrical wall.
    C.
    At the outer surface.
    D.
    None of these.

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  3. It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

  4. A.
    0.99
    B.
    0.95
    C.
    0.80
    D.
    0.55

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  5. A rivetted joint does not fail by __________ of rivets.

  6. A.
    tearing
    B.
    shearing
    C.
    tearing of the plate across a row
    D.
    none of these

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  7. Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

  8. A.
    permits the use of less tubes in a given shell diameter.
    B.
    facilitates comparatively easier external cleaning because of large clearance.
    C.
    permits the use of more tubes in a given shell diameter.
    D.
    both (b) and (c).

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  9. Bracket supports are the most suitable for supporting __________ vessels.

  10. A.
    thick walled vertical
    B.
    horizontal
    C.
    thin shperical (e.g. Horton sphere)
    D.
    none of these

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  11. In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

  12. A.
    baffle spacing
    B.
    clearance
    C.
    pitch
    D.
    none of these

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  13. Two iron pipes of the same nominal diameter but different schedule numbers will have the same

  14. A.
    inside diameter
    B.
    outside diameter
    C.
    wall thickness
    D.
    none of these

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  15. Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m2.°C.

  16. A.
    1250
    B.
    2500
    C.
    7500
    D.
    15000

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  17. Pick out the wrong statement

  18. A.
    For all the cylindrical process vessels operating above atmospheric pressure, formed heads are used for closing the vessel.
    B.
    Fouling factor of river water is less than that of sea water.
    C.
    Risers provided in bubble cap trays in the distillation column facilitate the flow of both liquid and vapor.
    D.
    both (b) and (c).

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  19. Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

  20. A.
    5
    B.
    20
    C.
    35
    D.
    55

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