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- Question
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.
Options- A. The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation.
- B. Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps.
- C. The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4.
- D. none of these.
- Correct Answer
- none of these.
- 1. Polyhexamethylene adipimide is also known as
Options- A. bakelite
- B. nylon-66
- C. epoxy resin
- D. silicone rubber Discuss
- 2. Isobaric process means a constant process.
Options- A. temperature
- B. pressure
- C. volume
- D. entropy Discuss
- 3. The unit of 'time constant' of a system is the same as that of
Options- A. velocity
- B. time
- C. (time)-1
- D. none of these Discuss
- 4. Pick out the wrong statement.
Options- A. There is no transfer lag for a single first order system.
- B. Stirred tank with a water jacket exemplifies an interacting system.
- C. Transfer lag is a characteristics of all higher order systems (other than first order systems).
- D. Transfer lag decreases as the number of stages decreases. Discuss
- 5. The value of a property decreases __________ with time in straight line method of determining depreciation.
Options- A. linearly
- B. non-linearily
- C. exponentially
- D. logarithmically Discuss
- 6. Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.
Options- A. viscosity
- B. thermal conductivity
- C. surface tension
- D. density Discuss
- 7. One 'amu' is equivalent to
Options- A. 9.31 Mev
- B. 931 eV
- C. 931 MeV
- D. 931 J Discuss
- 8. The most abundant isotope of natural uranium is
Options- A. 92U238
- B. 92U235
- C. 92U234
- D. none of these Discuss
- 9. Heavy water is preferred over ordinary water as a coolant, because it.
Options- A. acts both as an efficient coolant as well as a moderator.
- B. can be heated to a higher temperature without pressurizing.
- C. is less prone to radiation damage.
- D. all (a), (b) and (c). Discuss
- 10. Refractory materials are never used in the construction of
Options- A. segar cones
- B. orton cones
- C. pressure vessels
- D. ovens & retorts Discuss
More questions
Correct Answer: nylon-66
Correct Answer: pressure
Correct Answer: time
Correct Answer: Transfer lag decreases as the number of stages decreases.
Correct Answer: linearly
Correct Answer: density
Correct Answer: 931 MeV
Correct Answer: 92U238
Correct Answer: all (a), (b) and (c).
Correct Answer: pressure vessels
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