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Process Equipment and Plant Design problems

  • 1. The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

  • Options
  • A. 1
  • B. 2
  • C. 3
  • D. 3.5
    • Discuss
  • 2. A cylinderical pressure vessel of volume 6 ?m3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to

  • Options
  • A. 5 mm
  • B. 6 mm
  • C. 8 mm
  • D. 10 mm
    • Discuss
  • 3. Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.

  • Options
  • A. conical
  • B. flat
  • C. floating
  • D. fixed
    • Discuss
  • 4. Lug support is meant for supporting __________ vessels.

  • Options
  • A. large horizontal cylindrical
  • B. tall but empty
  • C. small
  • D. thick walled tall
    • Discuss
  • 5. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

  • Options
  • A. containing suspended solids flows at low velocity.
  • B. containing suspended solids flows at high velocity.
  • C. is highly viscous.
  • D. is of high specific gravity.
    • Discuss
  • 6. Pick out the wrong statement.

  • Options
  • A. In practical operation, distillation towers having diameter 3-6 metres equipped with bubble cap (round) size of 15 cms are used.
  • B. Height of packing in a packed tower is about 3 times the column diameter for raschig rings and about 5 to 10 times the column diameter for saddle packing.
  • C. In a seive tray, the minimum hole diameter is equal to the tray thickness.
  • D. In a stainless steel seive tray, the minimum hole diameter is equal to 10 times the plate thickness.
    • Discuss
  • 7. Which of the following packing materials provides for maximum mass transfer?

  • Options
  • A. Lessig rings.
  • B. Raschig rings.
  • C. Cross-partition rings.
  • D. All give the same value.
    • Discuss
  • 8. Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

  • Options
  • A. d = 1.1 t
  • B. d = 1.6 t
  • C. d = 1.5 t
  • D. 3t
    • Discuss
  • 9. The ratio of linear stress to linear strain is termed as the

  • Options
  • A. modulus of elasticity
  • B. modulus of rigidity
  • C. bulk modulus
  • D. none of these
    • Discuss
  • 10. Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

  • Options
  • A. 10
  • B. 50
  • C. 100
  • D. 150
    • Discuss

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