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- Question
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.
Options- A. 0.6-0.8 times
- B. equal to
- C. twice
- D. 2 ft irrespective of (for column > 3 ft diameter)
- Correct Answer
- 0.6-0.8 times
- 1. What is the slope of the operating line in the rectifying section of a distillation coloumn?
Options- A. 0
- B. ?
- C. > 1
- D. <1 Discuss
- 2. When one of the fluids is highly corrosive and has fouling tendency, it should
Options- A. preferably flow inside the tube for its easier internal cleaning.
- B. perferably flow outside the tube.
- C. flow at a very slow velocity.
- D. flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current. Discuss
- 3. In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
Options- A. l/5th
- B. l/15th
- C. l/30th
- D. l/50th Discuss
- 4. The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is
Options- A. pd/2t
- B. pd/4t
- C. pd/t
- D. pd/8t Discuss
- 5. Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?
Options- A. Segmental baffle
- B. Flat plate extending across the wall
- C. Disk type baffle
- D. Helical type baffle Discuss
- 6. In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.
Options- A. chain
- B. diamond
- C. zig-zag
- D. none of these Discuss
- 7. Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of
Options- A. preventing the local overstressing of the shell around the opening.
- B. reduction of discontinuity in shape at the junction.
- C. making the joint leak proof.
- D. none of these. Discuss
- 8. At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.
Options- A. higher
- B. lower
- C. same
- D. unpredictable Discuss
- 9. Seamless pipe is made
Options- A. from rolled strips formed into cylinders and seam-welded.
- B. by extrusion & casting into static and centrifugal molds.
- C. by forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing.
- D. both (b) and (c). Discuss
- 10. The minimum baffle height should be
Options- A. equal to the impeller diameter.
- B. twice the impeller diameter.
- C. twice the tank diameter.
- D. 3/4 of the tank height. Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: <1
Correct Answer: preferably flow inside the tube for its easier internal cleaning.
Correct Answer: l/15th
Correct Answer: pd/4t
Correct Answer: Flat plate extending across the wall
Correct Answer: diamond
Correct Answer: preventing the local overstressing of the shell around the opening.
Correct Answer: lower
Correct Answer: both (b) and (c).
Correct Answer: twice the impeller diameter.
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