Discussion
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- Question
Reflux ratio variation in a distillation column is between
Options- A. zero and infinity
- B. zero and one
- C. minimum and infinity
- D. none of these
- Correct Answer
- minimum and infinity
- 1. In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.
Options- A. 2.5
- B. 7.5
- C. 15
- D. 20 Discuss
- 2. In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.
Options- A. 25-50
- B. 50-75
- C. 200-250
- D. 750-1000 Discuss
- 3. Height of the flights in the rotary drier is in the range of
Options- A. 0.08 to 0.12 d
- B. 0.02 to 0.05 d
- C. 0.2 to 0.5 d
- D. 0.5 to 0.6 d Discuss
- 4. Which of the following lengths of heat exchanger tubes are normally not used in practice?
Options- A. 2.5 metres
- B. 6 metres
- C. 10 metres
- D. 0.5 metre Discuss
- 5. Oxygen carrying pipelines in chemical industries are coloured with __________ colour.
Options- A. yellow
- B. black
- C. blue
- D. red Discuss
- 6. Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be
Options- A. d
- B. d
- C. 2?d
- D. 2d Discuss
- 7. In condenser, the cooling water is passed in the tube side in a pass arrangement, because
Options- A. it reduces heat transfer area.
- B. more thinner tubes can be used.
- C. pressure drop is reduced.
- D. it makes condenser compact. Discuss
- 8. Longitundinal stress induced in a thin walled cylindrical storage vessel is
Options- A.
- B.
- C.
- D.
Discuss
- 9. 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
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: 7.5
Correct Answer: 50-75
Correct Answer: 0.08 to 0.12 d
Correct Answer: 10 metres
Correct Answer: blue
Correct Answer: d
Correct Answer: it reduces heat transfer area.
Correct Answer:
Correct Answer: both (a) & (b).
Correct Answer: 1.1 to 1.5
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