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Chemical Engineering :: Process Equipment and Plant Design

  1. Fresh water carrying pipelines in chemical industries are coloured with __________ color.

  2. A.
    sea green
    B.
    brown
    C.
    yellow
    D.
    red

  3. Which of the following material is seldom used for pressure vessel construction ?

  4. A.
    Rimmed still
    B.
    Mild steel
    C.
    Killed steel
    D.
    Semi-killed steel

  5. The ratio of shear stress to shear strain is called

  6. A.
    bulk modulus
    B.
    shear modulus
    C.
    modulus of rigidity
    D.
    modulus of elasticity

  7. 25 per cent cut segmental baffle means that the baffle

  8. A.
    height is 75% of the I.D. of the shell.
    B.
    height is 25% of the I.D. of the shell.
    C.
    spacing is 75% of its height.
    D.
    width is 25% of its height.

  9. Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than __________ kilolitres.

  10. A.
    20
    B.
    30
    C.
    45
    D.
    85

  11. for fully open globe value may be around

  12. A.
    10
    B.
    25
    C.
    75
    D.
    300

  13. Lug support is

  14. A.
    the most suitable for thick vertical vessel.
    B.
    same as bracket support.
    C.
    provided usually for vessels of much smaller height than skirt supported vessels.
    D.
    all (a), (b) and (c).

  15. Pick out the wrong statement pertaining to the use of valve tray, seive tray and bubble cap trays in continuous distillation column.

  16. A.
    Bubble cap trays though most expensive are the best in situations, where low vapour rates is to be handled and a positive liquid seal is essential at all flow rates.
    B.
    Murphree efficiency of all the three trays are nearly equal, however the peak efficiency is generally higher for seive and valve trays than the bubble cap.
    C.
    Maintenance cost for valve and seive trays are comparatively more than bubble cap tray due to their relatively complicated construction features.
    D.
    Valve trays have the highest turn down ratio (i.e. the ratio of the highest to the lowest vapour flow rates) and thus provides the maximum flexible operating range.

  17. With increase in the number of shell passes, the value of FT

  18. A.
    increases
    B.
    decreases
    C.
    remains same
    D.
    remains same, only if the number of tube passes does not change.

  19. Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.

  20. A.
    1.5 to 2
    B.
    2.5 to 5
    C.
    5 to 10
    D.
    10 to 15