Discussion
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- Question
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
- Correct Answer
- diamond
- 1. 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) Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.
Options- A. 2
- B. 1/2
- C. 4
- D. 1/4 Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: 0.6-0.8 times
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: 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.
Correct Answer: 4
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