Discussion
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- Question
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
- Correct Answer
- 0.08 to 0.12 d
- 1. 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
- 2. Oxygen carrying pipelines in chemical industries are coloured with __________ colour.
Options- A. yellow
- B. black
- C. blue
- D. red Discuss
- 3. Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if
Options- A. plain carbon steel and cast iron parts are used.
- B. wall thickness is > 30 mm.
- C. material of construction is high alloy steel.
- D. both(b) & (c). Discuss
- 4. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the
Options- A. relative volatility is close to one (e.g., separation of close boiling isomers).
- B. feed is not at its bubble point.
- C. number of equilibrium stages in only stripping section is to be calculated.
- D. number of equilibrium stages required is likely to be very small. Discuss
- 5. For a given design of bubble cap, the number of bubble caps to be used per tray is set by the
Options- A. allowable gas velocity through the slots.
- B. plate spacing.
- C. diameter of the column.
- D. all (a), (b) and (c). Discuss
- 6. 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
- 7. 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
- 8. 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 Discuss
- 9. 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
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: 10 metres
Correct Answer: blue
Correct Answer: both(b) & (c).
Correct Answer: relative volatility is close to one (e.g., separation of close boiling isomers).
Correct Answer: allowable gas velocity through the slots.
Correct Answer: 50-75
Correct Answer: 7.5
Correct Answer: minimum and infinity
Correct Answer: d
Correct Answer: it reduces heat transfer area.
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