Discussion
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- Question
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
Options- A. Flat plate
- B. Hemispherical
- C. Torispherical
- D. Ellipsoidal
- Correct Answer
- Ellipsoidal
- 1.
for fully open globe value may be around
Options- A. 10
- B. 25
- C. 75
- D. 300 Discuss
- 2. A rivetted joint does not fail by __________ of rivets.
Options- A. tearing
- B. shearing
- C. tearing of the plate across a row
- D. none of these Discuss
- 3. In perforated plate towers, the
Options- A. hole sizes may be around 1/8" or 3/16".
- B. total hole area may be around 6 to 15% of tower cross-sectional area.
- C. pressure drop is less compared is similar bubble cap towers.
- D. all (a), (b) and (c). Discuss
- 4. Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.
Options- A. 5
- B. 20
- C. 35
- D. 55 Discuss
- 5. For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by
Options- A. Di, opt = 3 Q0.36 ?0.18
- B. Di, opt = 3.9 Q0.45 . ?0.23
- C. Di, opt = 7.6 Q0.36 . ?0.9
- D. Di, opt = 3 Q0.36 . ?1.86 ?0.08 Discuss
- 6. In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.
Options- A. 10
- B. 20
- C. 30
- D. 35 Discuss
- 7. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is
Options- A. more
- B. same
- C. less
- D. twice Discuss
- 8. In chemical process equipments, the conical bottom heads used, usually has an apex angle of
Options- A. 20°
- B. 40°
- C. 60°
- D. 80° Discuss
- 9. Two iron pipes of the same nominal diameter but different schedule numbers will have the same
Options- A. inside diameter
- B. outside diameter
- C. wall thickness
- D. none of these Discuss
- 10. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
Options- A. more
- B. less
- C. same
- D. cither (a) or (b); depends upon the I.D. of the pipe Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: 300
Correct Answer: none of these
Correct Answer: all (a), (b) and (c).
Correct Answer: 20
Correct Answer: Di, opt = 3 Q0.36 ?0.18
Correct Answer: 10
Correct Answer: less
Correct Answer: 60°
Correct Answer: inside diameter
Correct Answer: less
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