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- Question
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)
- Correct Answer
- more than
- 1. 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
- 2. In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)
Options- A. Aa = Sa
- B. 1.2 Aa = 1.2 Sa
- C. Sa = 1.5 Aa
- D. Aa = 1.5 Sa Discuss
- 3. Vertical condenser is advantageous to the horizontal condenser from operation point of view, when
Options- A. hydrostatic head is required for refluxing the condensate.
- B. only the function of condensation is to be carried out.
- C. sub cooling of condensate is desired.
- D. both the functions of condensation & sub cooling are carried out in a single unit. Discuss
- 4. A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.
Options- A. positive
- B. negative
- C. no
- D. none of these Discuss
- 5. Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
Options- A. 4-8
- B. 17-34
- C. 52-68
- D. 88-105 Discuss
- 6. 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
- 7. 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
- 8. In a thin cylindrical shell, the hoop stress is __________ stress.
Options- A. radial
- B. circumferential tensile
- C. compressive
- D. longitudinal Discuss
- 9. 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
- 10. "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
Process Equipment and Plant Design problems
Search Results
Correct Answer: 1 to 1.5
Correct Answer: Aa = Sa
Correct Answer: both the functions of condensation & sub cooling are carried out in a single unit.
Correct Answer: negative
Correct Answer: 17-34
Correct Answer: 10
Correct Answer: both (a) and (b)
Correct Answer: circumferential tensile
Correct Answer: All (a), (b) and (c).
Correct Answer: permit release of entrained vapour in the liquid.
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