Discussion
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- Question
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.
Options- A. 'n'th
- B. (1/n)th
- C. 0.5 nth
- D. 1.5 nth
- Correct Answer
- (1/n)th
- 1. Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.
Options- A. The corrosive and fouling fluid should be preferably routed through the tubes.
- B. The viscous fluid should be routed through the shell side.
- C. Lower flow rate fluid should be routed through the shell side.
- D. Higher pressure fluid stream should be routed through the shell side. Discuss
- 2. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
Options- A. working
- B. damaging
- C. allowable
- D. none of these Discuss
- 3. Steam is preferred to be used as a heating medium in heat exchangers, because of its
Options- A. low cost.
- B. high latent heat.
- C. non-corrosive condensate.
- D. high film co-efficient. Discuss
- 4. Accidents in chemical plants are mostly due to
Options- A. inadequate equipment design.
- B. faulty operating procedures.
- C. improper layout of the equipments.
- D. failure of equipments. Discuss
- 5. The dust collection efficiency of a cyclone separator
Options- A. decreases with increase in gas flow rate.
- B. is inversely proportional to the mass of the dust particle.
- C. is directly proportional to the radius of the dust particle path.
- D. none of these. Discuss
- 6. Pick out the wrong statement about distillation operation
Options- A. Distillation under vacuum is a substitute for steam distillation.
- B. In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation.
- C. In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other.
- D. Flash distillation, differential distillation & steam distillation are all continuous distillation processes. Discuss
- 7. Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.
Options- A. 300
- B. 600
- C. 1000
- D. 1500 Discuss
- 8. 1.2 to 3.8 cms is the value of the
Options- A. downcomer liquid seal in case of a balanced tray design.
- B. static submergence in case of a bubble cap tray for column operating under pressure (? 1 atm.).
- C. skirt clearance for bubble caps.
- D. all (a), (b) and (c). Discuss
- 9. Movement of pipeline caused by thermal expansion is taken care by providing
Options- A. expansion joint.
- B. changes in its direction.
- C. change in the shape of pipeline.
- D. all (a), (b) and (c). Discuss
- 10. In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.
Options- A. less than
- B. 1.25-1.50 times
- C. 2.5 times
- D. one-fourth of Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: Higher pressure fluid stream should be routed through the shell side.
Correct Answer: damaging
Correct Answer: high latent heat.
Correct Answer: faulty operating procedures.
Correct Answer: none of these.
Correct Answer: Flash distillation, differential distillation & steam distillation are all continuous distillation processes.
Correct Answer: 600
Correct Answer: all (a), (b) and (c).
Correct Answer: all (a), (b) and (c).
Correct Answer: 1.25-1.50 times
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