Discussion
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- Question
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
- Correct Answer
- 0.05 to 0.15
- 1. __________ shaped roof is most commonly used for cylindrical tanks.
Options- A. Cone
- B. Dome
- C. Umbrella
- D. Flat Discuss
- 2. Flanges are connected to pipes by
Options- A. screwing
- B. welding
- C. brazing
- D. all (a), (b) and (c) Discuss
- 3. 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
- 4. __________ dished head is the strongest of all.
Options- A. Hemispherical
- B. Elliptical
- C. Torispherical
- D. none of these Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.
Options- A. positive
- B. negative
- C. no
- D. none of these Discuss
- 9. Vertical condenser is advantageous to the horizontal condenser from operation point of view, when
Options- A. hydrostatic head is required for refluxing the condensate.
- B. only the function of condensation is to be carried out.
- C. sub cooling of condensate is desired.
- D. both the functions of condensation & sub cooling are carried out in a single unit. Discuss
- 10. In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)
Options- A. Aa = Sa
- B. 1.2 Aa = 1.2 Sa
- C. Sa = 1.5 Aa
- D. Aa = 1.5 Sa Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: Cone
Correct Answer: all (a), (b) and (c)
Correct Answer: all (a), (b) & (c).
Correct Answer: Hemispherical
Correct Answer: Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding.
Correct Answer: all (a), (b) & (c).
Correct Answer: 17-34
Correct Answer: negative
Correct Answer: both the functions of condensation & sub cooling are carried out in a single unit.
Correct Answer: Aa = Sa
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