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Home ‣ Chemical Engineering ‣ Process Equipment and Plant Design Comments
  • Question

  • In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is


  • Options
  • A. < 10
  • B. > 10
  • C. > 20
  • D. 30

  • Correct Answer
  • > 10 

    • Process Equipment and Plant Design problems

    Search Results

    • 1. In the design of a paddle agitator, the ratiois normally taken as

    • Options
    • A. 0.1
    • B. 0.8
    • C. 0.25
    • D. 0.5
      • Discuss
    • 2. __________ shapedroof is the most commonly used roof for cylinderical storage tanks.

    • Options
    • A. Conical
    • B. Flat
    • C. Dome
    • D. Umbrella
      • Discuss
    • 3. Diameter of the seive tray column is determined by the

    • Options
    • A. lower limit of vapour velocity.
    • B. upper limit of the vapour velocity.
    • C. hole diameter of the seive tray.
    • D. height of the plate spacing.
      • Discuss
    • 4. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

    • Options
    • A. (ph - dh)/ph
    • B. (ph - dh . dt/2)/ph
    • C. (ph - dt)/ph
    • D. (ph - dh)/dh
      • Discuss
    • 5. Normal screwed fittings are used for pipes upto a diameter of __________ inches.

    • Options
    • A. 1.5
    • B. 3
    • C. 5
    • D. 7
      • Discuss
    • 6. __________ is the determining factor for the number of bubble caps to be used per tray.

    • Options
    • A. Permissible slot velocity
    • B. Tray diameter
    • C. Liquid load
    • D. Vapor load
      • Discuss
    • 7. At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

    • Options
    • A. increases
    • B. decreases
    • C. remains same
    • D. may increase or decrease depending upon the solubility of the gas in the liquid
      • Discuss
    • 8. If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

    • Options
    • A. D/2 or minimum 2" to 5D.
    • B. D/5 or minimum 2" to 5D.
    • C. D/5 or minimum 2" to D.
    • D. none of these.
      • Discuss
    • 9. Weep holes provided in the plates of a distillation column

    • Options
    • A. facilitate draining out liquid from a tray when the unit is not in operation.
    • B. are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid.
    • C. must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation.
    • D. all (a), (b) and (c).
      • Discuss
    • 10.  for a Tee (used as elbow, entering branch) would be

    • Options
    • A. less than that for Tee (used as elbow, entering run).
    • B. more than that for Tee (used as elbow, entering run).
    • C. around 90.
    • D. both (b) and (c).
      • Discuss

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