Discussion
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- Question
Drying operation under vacuum is carried out to
Options- A. dry those materials which have very high unbound mositure content.
- B. reduce drying temperature.
- C. increase drying temperature.
- D. dry materials having high bound moisture content.
- Correct Answer
- reduce drying temperature.
- 1. In distillation, overhead product contains
Options- A. only one component
- B. two components
- C. any number of components
- D. only saturated liquid Discuss
- 2. In case of an absorber, the operating
Options- A. line always lies above the equilibrium curve.
- B. line always lies below the equilibrium curve.
- C. line can be either above or below the equilibrium curve.
- D. velocity is more than the loading velocity. Discuss
- 3. On addition of solute in the solvent, the __________ of the solution decreases.
Options- A. boiling point
- B. freezing point
- C. vapour pressure
- D. both (b) and (c) Discuss
- 4. Chemisorption (chemical adsorption) is
Options- A. same as "Van der Waals" adsorption.
- B. characterised by adsorption of heat.
- C. an irreversible phenomenon.
- D. a reversible phenomenon. Discuss
- 5. The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by
Options- A. raising the temperature.
- B. lowering the total pressure.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
- 6. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
Options- A. latent heat
- B. humid heat
- C. specific heat
- D. sensible heat Discuss
- 7. A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternery system containing twopairs of partially miscible liquids?
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 8. __________ columns are used for liquid dispersion in a continuous gas phase.
Options- A. Packed
- B. Pulse
- C. Bubble cap
- D. Sieve plate Discuss
- 9. Which of the following plays an important role in problems of simultaneous heat and mass transfer?
Options- A. Lewis number
- B. Schmidt number
- C. Prandtl number
- D. Sherwood number Discuss
- 10. The rate of solid-liquid extraction is limited by the
Options- A. phase change of the solute as it dissolves in the solvent.
- B. diffusion of the solute through the solvent in the pores to the outside of the particle.
- C. diffusion of the solute from the solution in contact with the particle to the main bulk of the solution.
- D. all 'a', 'b' & 'c'. Discuss
Mass Transfer problems
Search Results
Correct Answer: any number of components
Correct Answer: line always lies above the equilibrium curve.
Correct Answer: both (b) and (c)
Correct Answer: an irreversible phenomenon.
Correct Answer: both (a) and (b).
Correct Answer: specific heat
Correct Answer: 0
Correct Answer: Packed
Correct Answer: Lewis number
Correct Answer: all 'a', 'b' & 'c'.
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