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- Question
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.
Options- A. 19
- B. 38
- C. 76
- D. 95
- Correct Answer
- 38
- 1.
for a Tee (used as elbow, entering run) would be around
Options- A. 5
- B. 60
- C. 200
- D. 350 Discuss
- 2. Pick out the wrong statement.
Options- A. If sufficient residence time (around 8 seconds) is not proivided to the downcoming liquid in the downcomer, it may entrain some vapour.
- B. The liquid head in the downcomer should not be greater than one half the plate spacing to avoid flooding.
- C. The dischare end of the downcomer must project far enough into the tray liquid so that no gas bubbles can enter the open end and by pass the bubble caps.
- D. none of these. Discuss
- 3. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, ? = yield strength and E = modulus of elasticity)
Options- A. E
- B. ?
- C. ?/E
- D. E/? Discuss
- 4. Which of the following efficiencies can be greater than 100%?
Options- A. Overall plate efficiency.
- B. Murphree plate efficiency.
- C. Point efficiency.
- D. None of these. Discuss
- 5. Pick out the wrong statement.
Options- A. Lug supports are less expensive than other type of supports.
- B. A pipe is differentiated from a tube by the fact that a pipe has a greater wall thickness compared to the tube.
- C. A reducer is used to change the direction of a pipe in a straight run.
- D. The method of fixing tubes to a tube sheet by expanding is called 'tube rolling'. Discuss
- 6. The distance between the centre of a rivet hole to the nearest edge of the plate is called
Options- A. pitch
- B. margin
- C. back pitch
- D. none of these Discuss
- 7. Vertical storage vessels are never supported by __________ support.
Options- A. bracket
- B. saddle
- C. skirt
- D. lug Discuss
- 8. Power required for agitation depends upon the
Options- A. height & properties of the liquid.
- B. agitator type & speed of agitation.
- C. size of agitator & the tank.
- D. all (a), (b) and (c). Discuss
- 9. Wind load consideration in the design of a support can be neglected, when the vessel is
Options- A. tall (say 30 metres), but is full of liquid.
- B. tall but empty.
- C. short (< 2 m) and housed indoor.
- D. none of these. Discuss
- 10. Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always
Options- A. less than arithmetic mean value.
- B. more than arithmetic mean value.
- C. more than geometric mean value.
- D. both(b) & (c). Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: 60
Correct Answer: none of these.
Correct Answer: ?/E
Correct Answer: Murphree plate efficiency.
Correct Answer: A reducer is used to change the direction of a pipe in a straight run.
Correct Answer: margin
Correct Answer: saddle
Correct Answer: all (a), (b) and (c).
Correct Answer: short (< 2 m) and housed indoor.
Correct Answer: less than arithmetic mean value.
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