Related Mcqs:

1. In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions: (i) Reflux stream is completely liquid and is at its bubble point. (ii) Reflux stream is below its bubble point ?

   A. Condenser and reboiler loads are the same in both the cases
   B. Reboiler load is the same in both the cases but condenser load is higher in case (ii)
   C. Condenser load is the same in both the cases but reboiler load is higher in case (ii)
   D. Both condenser and reboiler loads are higher in case (ii) as compared to case (i)

2. In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at ________________ reflux ?

   A. Total
   B. Minimum
   C. Operating
   D. Maximum permissible

3. Equilibrium-moisture curves of different solids ____________________ ?

   A. Are different
   B. Are same
   C. Depend on the humidity of the gas
   D. None of these

4. Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?

   A. log P vs. T
   B. log P vs. log T
   C. T vs. P
   D. P vs. log T

5. Separation of two volatile liquids by distillation makes use of their___________________?

   A. Selectivity
   B. Relative volatility
   C. Solubility
   D. Density difference

6. Flash distillation is suitable for the separation of components_________________?

   A. Having very close boiling points
   B. Which form maximum boiling azeotrope
   C. Having very wide boiling points
   D. Which form minimum boiling azeotrope

7. Steam distillation is used for separation of high boiling ____________________?

   A. Substances from non-volatile impurities
   B. Volatile impurity from still higher boiling substances
   C. Both A. and B.
   D. Neither A. nor B.

8. For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will_____________________?

   A. Increase
   B. Decrease
   C. Remain same
   D. Data insufficient, can’t be predicted

9. _____________ is used as an ‘entrainer’ for the separation of acetic acid-water mixture by distillation?

   A. Furfural
   B. Benzol
   C. Butyl acetate
   D. Hexane

10. The minimum number of theoretical plates is required for achieving a given separation in distillation column with_________________?

    A. No reflux
    B. Total reflux
    C. Zero reflux ratio
    D. Minimum reflux ratio