# Distillation Design Questions and Answers – Inside Out Method

This set of Distillation Design Multiple Choice Questions & Answers (MCQs) focuses on “Inside Out Method”.

1. Boston and Sullivan gave the concept of the
a) False method
b) Binary method
c) MESH Method
d) Inside Out Method

Explanation: Boston and Sullivan gave the concept of the Inside Out Method in 1973, MESH method involve the satisfaction of all equations.

2. ln Sbj is represented as
a) ln (KbjLJ/VJ)
b) ln (Kbj/VJ)
c) ln( KbjLJ)
d) ln (LJ)

Explanation: ln Sbj = ln (KbjLJ/VJ), this also resembles the same as the stripping factor that is used in the matrix calculations.

3. The vapors side product ln Rvj is given as
a) ln (KbjLJ/VJ)
b) ln (WbjLJ/VJ)
c) ln (KbjLJ/WJ)
d) ln (WJ)

Explanation: ln Rvj = ln (WjLJ/VJ) is the vapors side product, L and V respectively measuring the flow rates of liquid and gas streams.

4. The liqiud side product ln RLj is given as
a) ln (KbjLJ/VJ)
b) ln (Wbj/VJ)
c) ln (KbjLJ/WJ)
d) ln (WJ/LJ)

Explanation: RLj= ln (WJ/LJ) is the liquid side product, calculation of R factor for both components i and as well as j are equally important as that used in Sij.

5. For Russell method, ln Kbj is defined as
a) Aj – (Bj/Tj)
b) – (Bj/Tj)
c) Aj (Bj/Tj)
d) Aj + (Bj/Tj)

Explanation: For Russell method ln Kbj = Aj–(Bj/Tj), the Russell equations resembles the same as that of the Antoine equation for detecting vapor pressure.
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6. For Boston method, ln Kbj
a) Aj + B (1j/Tj – 1/T*)
b) Aj – B (1j/Tj – 1/T*)
c) Aj – B (1j/Tj + 1/T*)
d) (1j/Tj + 1/T*)

Explanation: For Boston method ln Kbj = Aj – B (1j/Tj – 1/T*), this method is a revised version of the Russell method including T* i.e. equilibrium temperature.

7. HJ is defined as the
a) Ideal enthalpy
b) Total enthalpy
c) Final enthalpy
d) Pure enthalpy

Explanation: HJ is defined as the Ideal enthalpy based on liquid and gas compositions, while Hideal is defined as the ideal enthalpy.

8. HJ is formulated as
a) H* /ϫHVJ
b) H*- ϫHVJ
c) H* ( ϫHVJ)
d) H* + ϫHVJ

Explanation: HJ = H* + ϫHVJ, here H* is equilibrium enthalpy and which is added to the difference of x with the current enthalpy.

9. Total balance material balance is given as
a) αijSbj
b) αijHbj
c) αijDbj
d) αijVbj

Explanation: Total balance material balance SIJ = αijSbj,alpha is defined as the relative volatility and acts here as a correction factor.

10. The given function f(x) = x3-3X2+ 4 root is?
a) Negative
b) Positive
c) Unity
d) Zero