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Process Equipment and Plant Design problems

  • 1. In a thin cylindrical shell, the hoop stress is __________ stress.

  • Options
  • A. radial
  • B. circumferential tensile
  • C. compressive
  • D. longitudinal
    • Discuss
  • 2. Which of the following factors determine the amount of entrainment in a distillation column?

  • Options
  • A. Plate spacing.
  • B. Depth of liquid above the bubble cap slots.
  • C. Vapour velocity in the volume between the plates.
  • D. All (a), (b) and (c).
    • Discuss
  • 3. "A claming section" before the liquid flows into the downcomer is privided to

  • Options
  • A. permit release of entrained vapour in the liquid.
  • B. reduce the discharge fluctuation.
  • C. ensure better vapour-liquid contact.
  • D. cool the liquid before it flows down.
    • Discuss
  • 4. In shell and tube heat exchangers, straight tie rods are used to

  • Options
  • A. hold baffle in space.
  • B. fix the tubes in position.
  • C. account for thermal strain.
  • D. none of these.
    • Discuss
  • 5. In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

  • Options
  • A. molal flow rate of vapour
  • B. vapour molecular weight
  • C. pressure and temperature
  • D. all (a), (b) and (c)
    • Discuss
  • 6. Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

  • Options
  • A. 30°
  • B. 45°
  • C. 60°
  • D. 75°
    • Discuss
  • 7. The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line)

  • Options
  • A. S1/S2
  • B. S1.S2
  • C. S2/S1
  • D. 1/S1.S2
    • Discuss
  • 8. Nominal size of a pipe is an indication of its __________ diameter.

  • Options
  • A. inner
  • B. outer
  • C. approximate
  • D. none of these
    • Discuss
  • 9. Pressure drop due to pipe fittings can be estimated by the equation,
    Chemical Engineering Process Equipment and Plant Design: Pressure drop due to pipe fittings can be estimated by the equation,, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Chemical Engineering Process Equipment and Plant Design: Pressure drop due to pipe fittings can be estimated by the equation,(dimensionless) for 45° elbow and 180° close return bends would be respectively around

  • Options
  • A. 5 and 10
  • B. 45 and 75
  • C. 180 and 300
  • D. 300 and 500
    • Discuss
  • 10. The retention time of material in a rotary dryer depends upon its

  • Options
  • A. rpm
  • B. slope & length
  • C. flights arrangement
  • D. all (a), (b) and (c)
    • Discuss

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