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- Question
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
- Correct Answer
- 4
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. Removable connection of tubes to tube sheet is called
Options- A. ferrule
- B. socket
- C. nipple
- D. saddle Discuss
- 7. 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
- 8. The buckling tendency of compression members is always in the direction of the
Options- A. least radius of gyration.
- B. axis of the load.
- C. perpendicular to the axis of the load.
- D. none of these. Discuss
- 9. Baffle spacing is generally __________ the I.D. of the shell.
Options- A. more than
- B. not greater than
- C. not less than one fifth of
- D. both (b) and (c) Discuss
- 10. 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: twice the impeller diameter.
Correct Answer: both (b) and (c).
Correct Answer: lower
Correct Answer: preventing the local overstressing of the shell around the opening.
Correct Answer: diamond
Correct Answer: ferrule
Correct Answer: relieving excess pressure.
Correct Answer: least radius of gyration.
Correct Answer: both (b) and (c)
Correct Answer: none of these.
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