Process Equipment and Plant Design problems
- 1. In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ? = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier cross-section H = hold up of solid.)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 2. The dust collection efficiency of electrostatic precipitator increases with increase in the
Options- A. gas flow rate.
- B. electrode area.
- C. both (a) & (b).
- D. neither (a) nor (b). Discuss
Correct Answer: electrode area.
- 3. 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
Correct Answer: called tube clearance.
- 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
Correct Answer: all (a), (b) & (c)
- 5. 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
Correct Answer: G0.8
- 6. 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
Correct Answer: Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding.
- 7. __________ dished head is the strongest of all.
Options- A. Hemispherical
- B. Elliptical
- C. Torispherical
- D. none of these Discuss
Correct Answer: Hemispherical
- 8. 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). Discuss
Correct Answer: all (a), (b) & (c).
- 9. Flanges are connected to pipes by
Options- A. screwing
- B. welding
- C. brazing
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 10. __________ shaped roof is most commonly used for cylindrical tanks.
Options- A. Cone
- B. Dome
- C. Umbrella
- D. Flat Discuss
Correct Answer: Cone
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