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  • Question

  • Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?


  • Options
  • A. Larger dia vessel.
  • B. Smaller dia vessel.
  • C. Larger dia long vessel.
  • D. Strength of the vessel is same irrespective of the diameter.

  • Correct Answer
  • Smaller dia vessel. 

    • Process Equipment and Plant Design problems

    Search Results

    • 1. Friction factor for turbulent flow in a new pipe is given by

    • Options
    • A.
    • B.
    • C. f = 0.22 NRe0.5
    • D.
      • Discuss
    • 2. 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?

    • Options
    • A. hemispherical
    • B. ellipsoidal (2 : 1)
    • C. conical
    • D. flat plate
      • Discuss
    • 3. In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

    • Options
    • A. 1.1 to 1.5
    • B. 1.6 to 2
    • C. 2.2 to 2.6
    • D. 2.7 to 3
      • Discuss
    • 4. A pipe is generally made of circular cross-section, because a circular cross-section has the

    • Options
    • A. higher structural strength.
    • B. lowest surface area requirement for a given volume.
    • C. both (a) & (b).
    • D. none of these.
      • Discuss
    • 5. Longitundinal stress induced in a thin walled cylindrical storage vessel is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

    • Options
    • A. 0.1-0.2
    • B. 0.2-0.5
    • C. 0.4-0.9
    • D. 1.2-1.5
      • Discuss
    • 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

    • Options
    • A. 1000
    • B. 3000
    • C. 5000
    • D. 10000
      • Discuss
    • 8. Skirt support is the most suitable for supporting __________ vessels.

    • Options
    • A. small horizontal
    • B. large horizontal
    • C. tall vertical
    • D. thick walled
      • Discuss
    • 9. Baffles may be eliminated for

    • Options
    • A. low viscosity liquids (< 200 poise).
    • B. high viscosity liquids (> 600 poise).
    • C. large diameter tanks.
    • D. none of these.
      • Discuss
    • 10. In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference

    • Options
    • A. is always less than arithmetic average value.
    • B. is always more than arithmetic mean value and the geometric mean value.
    • C. is always less than arithmetic mean value, but more than geometric mean value.
    • D. may be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current.
      • Discuss

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