Discussion
Home ‣ Chemical Engineering ‣ Process Equipment and Plant Design Comments
- Question
Lap joints are preferred for plates having thickness __________ mm.
Options- A. < 12.5
- B. > 3
- C. > 5
- D. 5-10
- Correct Answer
- > 3
- 1. A cylindrical storage tank can have a self supported conical roof,
Options- A. if its diameter is less than 15-20metres.
- B. if its diameter is more than 50 meters.
- C. if the thickness of the roof is more than that of the cylindrical shell.
- D. irrespective of its diameter. Discuss
- 2. In inclined long tube vertical evaporators, the tubes are inclined at an angle of
Options- A. 15°
- B. 90°
- C. 45°
- D. 60° Discuss
- 3. The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.
Options- A. 6
- B. 12
- C. 18
- D. 34 Discuss
- 4. Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.
Options- A. 1/10th
- B. 1/20th
- C. 1/30th
- D. 1/50th Discuss
- 5. Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
Options- A. 0.1 to 0.3
- B. 0.6 to 0.7
- C. 0.85 to 0.95
- D. 1.5 to 2 Discuss
- 6. Joint efficiency (J) for a seamless pipe is
Options- A. 1
- B. 0.85
- C. 1.2
- D. < 0.5 Discuss
- 7. The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.
Options- A. 6
- B. 18
- C. 24
- D. 34 Discuss
- 8. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.
Options- A. 1
- B. 5
- C. 15
- D. 25 Discuss
- 9. Maximum allowable vapour velocity in a bubble cap tower is determined by the
Options- A. entrainment considerations.
- B. vapour density.
- C. diameter of the column.
- D. none of these. Discuss
- 10. Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency
Options- A. increases
- B. decreases
- C. remains same
- D. may increase or decrease depending upon the plate spacing Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: if its diameter is less than 15-20metres.
Correct Answer: 45°
Correct Answer: 18
Correct Answer: 1/30th
Correct Answer: 0.6 to 0.7
Correct Answer: 1
Correct Answer: 6
Correct Answer: 25
Correct Answer: entrainment considerations.
Correct Answer: increases
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