Engineering Questions with Answers - Multiple Choice Questions

# Distillation Design MCQ’s – Rigorous Computational Methods

1 - Question

Which of the following is also called Rating method?
a) McCabe Thiele
b) Ponchan Savarit
c) Thiele Geddes
d) Homotomy

Explanation: Thiele Geddes is also called as rating method, McCabe Thiele is called tray analysis method and Ponchan Savarit as enthalpy method.

2 - Question

In Thiele Geddes method, which of the following are calculated?
a) Vapor and liquid compositions
b) Input and output fees rates
c) Reflux ratio
d) Boil up

Explanation: Vapor and liquid compositions are calculated In Thiele Geddes method, while reflux ratio in McCabe Thiele method.

3 - Question

Which method is the inverse of Thiele Geddes Method?
a) Lewis Matheson
b) Ponchan Savarit
c) McCabe Thiele
d) Homotomy

Explanation: Lewis Matheson is the inverse of Thiele Geddes method, while other listed methods are completely different from each other and all are used to calculate number of trays.

4 - Question

Lewis Matheson method can be adjusted, for fixed number of
a) Trays
b) Stages
c) Columns
d) Sections

Explanation: Lewis Matheson method can be adjusted for fixed number of Stages instead of reflux ratio fixed.

5 - Question

Tj is assigned as the
a) Stage temperature
b) Boiler temperature
c) Condenser temperature
d) Components temperature

Explanation: Tj is assigned as the Stage temperature, While TC and TB are assigned as condenser and boiler temperature.

6 - Question

The value of K is independent of
a) Composition
b) Feed ratio
c) Volatility
d) Reflux

Explanation: As per the relation the value of K is given as the function of KV = f (pure liquid)/f (pure vapor).

7 - Question

User provided internal flows are generally for
a) Reflux in high purity
c) Narrow building columns
d) NOR relation

Explanation: User provided internal flows are generally for Reflux in high purity, overhead liquid products and Narrow building columns also called as NOR relation.

8 - Question

For accurate Reflux, estimate
a) Reflux of high purity is used
b) Narrow boiling is used
c) Super fractionators are used
d) Final temperature is used

Explanation: For accurate Reflux estimate, narrow boiling is necessary, where separation is required the reflux of high priority is used.

9 - Question

Azeotropic composition is?
a) y*>x
b) y*<x
c) y*=x
d) x+y* = 1

Explanation: Azeotropic composition is y*=x, whereas the x+y* = 1 gives the actual mole balance of gas and liquid at equilibrium.

10 - Question

Molecular Distillation is
a) For heat sensitive materials
b) Very low pressure distillation
c) High low pressure distillation
d) Purge pressure