Discussion
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- Question
In the design of a shell and tube heat exchanger, the corrosion allowance
Options- A. need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.
- B. for carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm.
- C. for internal cover and tube sheet is provided on both the sides.
- D. all (a), (b) & (c).
- Correct Answer
- all (a), (b) & (c).
- 1. __________ dished head is the strongest of all.
Options- A. Hemispherical
- B. Elliptical
- C. Torispherical
- D. none of these Discuss
- 2. Pick out the correct statement.
Options- A. It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling
- B. Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes.
- C. Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing.
- D. Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding. Discuss
- 3. Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to
Options- A. G0.2
- B. G0.5
- C. G0.8
- D. G1.5 Discuss
- 4. In the design of a bag filter, the gas temperature is an important consideration, as it affects the
Options- A. gas density
- B. gas viscosity
- C. fibre selection
- D. all (a), (b) & (c) Discuss
- 5. Shortest distance between two tubes is
Options- A. called tube pitch.
- B. called tube clearance.
- C. more in case of triangular pitch as compared to square pitch of tube layout.
- D. none of these. Discuss
- 6. Flanges are connected to pipes by
Options- A. screwing
- B. welding
- C. brazing
- D. all (a), (b) and (c) Discuss
- 7. __________ shaped roof is most commonly used for cylindrical tanks.
Options- A. Cone
- B. Dome
- C. Umbrella
- D. Flat Discuss
- 8. Hold up of material in a operating rotary drier is in the range of
Options- A. 0.05 to 0.15
- B. 0.25 to 0.50
- C. 0.5 to 0.8
- D. 0.8 to 0.9 Discuss
- 9. In case of design of a shell and tube heat exchanger,
Options- A. minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch.
- B. minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter.
- C. O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres.
- D. all (a), (b) & (c). Discuss
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: Hemispherical
Correct Answer: Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding.
Correct Answer: G0.8
Correct Answer: all (a), (b) & (c)
Correct Answer: called tube clearance.
Correct Answer: all (a), (b) and (c)
Correct Answer: Cone
Correct Answer: 0.05 to 0.15
Correct Answer: all (a), (b) & (c).
Correct Answer: 17-34
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