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

View Answer

Answer: c
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

View Answer

Answer: a
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

View Answer

Answer: a
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

View Answer

Answer: b
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

View Answer

Answer: d
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

View Answer

Answer: a
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
b) Overhead liquid products
c) Narrow building columns
d) NOR relation

View Answer

Answer: d
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

View Answer

Answer: b
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

View Answer

Answer: c
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

View Answer

Answer: b
Explanation: Molecular Distillation is done for very low pressure distillation operations, while batch distillation occurs at high pressure and temperatures.