Discussion
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- Question
The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.
Options- A. 5
- B. 15
- C. 7.5
- D. 50
- Correct Answer
- 15
- 1. For high pressure process equipments/vessels, the connected nozzle should be
Options- A. welded
- B. screwed
- C. flanged
- D. brazed Discuss
- 2. The function of manholes provided in the shell of a distillation column is to
Options- A. keep a check on the liquid gradient over the plate by direct visual observation.
- B. give access to the individual trays for cleaning, maintenance and installation.
- C. guard against foaming & entrainment by dumping antifoaming agent through it.
- D. all (a), (b) and (c). Discuss
- 3. The thermal stress in a metallic bar does not depend upon the
Options- A. changes in temperature.
- B. cross-sectional area.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
- 4. Stress-strain diagram for low carbon steel/mild steel is shown below in the Fig.
The point 'A' on the Fig. represents the
Options- A. breaking stress
- B. ultimate stress
- C. elastic limit
- D. yield point Discuss
- 5. Pick out the wrong statement pertaining to the design of the distillation column.
Options- A. Generally, a skirt clerance of 0.5" to 1.5' is recommended to prevent plugging of the slots by residue build up.
- B. The purpose of the slot is to disperse the gas into the liquid in the form of small bubbles.
- C. If sufficient slot area is not provided, the gas may pass through the skirt clearance.
- D. none of these. Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. In inclined long tube vertical evaporators, the tubes are inclined at an angle of
Options- A. 15°
- B. 90°
- C. 45°
- D. 60° Discuss
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: flanged
Correct Answer: give access to the individual trays for cleaning, maintenance and installation.
Correct Answer: cross-sectional area.
Correct Answer: elastic limit
Correct Answer: none of these.
Correct Answer: 0.6 to 0.7
Correct Answer: 1/30th
Correct Answer: 18
Correct Answer: 45°
Correct Answer: if its diameter is less than 15-20metres.
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