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- Question
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).
- Correct Answer
- All (a), (b) and (c).
- 1. In a thin cylindrical shell, the hoop stress is __________ stress.
Options- A. radial
- B. circumferential tensile
- C. compressive
- D. longitudinal Discuss
- 2. Rate of filtrate delivery is inversely proportional to the
Options- A. filtering area & the pressure difference driving force.
- B. viscosity of filtrate.
- C. cake & filter medium resistance.
- D. both (a) and (b) Discuss
- 3. A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is
Options- A. 10
- B. 10
- C. 20
- D. 20 Discuss
- 4. Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
Options- A. less than
- B. more than
- C. same as
- D. either more or less (depending upon relative volatility) Discuss
- 5. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.
Options- A. 1 to 1.5
- B. 2.5 to 3.5
- C. 4 to 5
- D. 6 to 8 Discuss
- 6. "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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: circumferential tensile
Correct Answer: both (a) and (b)
Correct Answer: 10
Correct Answer: more than
Correct Answer: 1 to 1.5
Correct Answer: permit release of entrained vapour in the liquid.
Correct Answer: hold baffle in space.
Correct Answer: all (a), (b) and (c)
Correct Answer: 60°
Correct Answer: S1/S2
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