Discussion
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- Question
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
- Correct Answer
- lower
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. Removable connection of tubes to tube sheet is called
Options- A. ferrule
- B. socket
- C. nipple
- D. saddle Discuss
- 10. A 'rupture disc' is provided in chemical equipments as an accessory meant for
Options- A. relieving excess pressure.
- B. creating turbulence.
- C. enhancing mixing rate.
- D. avoiding vortex formation. Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: preventing the local overstressing of the shell around the opening.
Correct Answer: diamond
Correct Answer: 0.6-0.8 times
Correct Answer: <1
Correct Answer: preferably flow inside the tube for its easier internal cleaning.
Correct Answer: both (b) and (c).
Correct Answer: twice the impeller diameter.
Correct Answer: 4
Correct Answer: ferrule
Correct Answer: relieving excess pressure.
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