Engineering Questions with Answers - Multiple Choice Questions

# Distillation Design MCQ’s – Bubble Point Method

1 - Question

The temperature where the first vapor is formed, when heating a liquid consisting of two or more components
a) Dew point
b) Bubble point
c) Final point
d) Aniline point

Explanation: The temperature where the first vapor is formed when heating a liquid consisting of two or more components Bubble point, while when the first drop of aniline separates out is called the aniline point.
Nc∑Yi ∑Kixi.

2 - Question

The below equation holds for a) K and X relation
b) K and Bubble relation
c) Components and K values relation
d) Nc Relation

Explanation: At the bubble point, the following relationship holds always, representing Nc as number of components and yi as the mole fraction of all components.

3 - Question

The K in the below equation holds for a) Distribution Factor
b) Henry Factor
c) Vapor Factor
d) Dew factor

Explanation: K is the distribution coefficient, defined as the ratio of mole fraction in the vapor phase, these are not always equal but are somehow equivalent to each other.

4 - Question

When Raoult’s law and Dalton’s law hold for the mixture, the K factor is
a) Pi/P
b) Yi/Xi
c) Y*/X
d) X*/X

Explanation: When Raoult’s law and Dalton’s law hold for the mixture, the K factor is Pi/P, indicating Pi as the partial pressure of system and P as total pressure.

5 - Question

The bubble point method is the most widely used for
a) Pore size determination
b) Bubble size determination
c) Stages determination
d) Tray determination

Explanation: The bubble point method is the most widely used for Pore size determination, Underwood, Gilliland, McCabe are used for stages and tray determination.

6 - Question

The BP Method generally work best for
a) Narrow Boiling systems
b) Ideal systems
c) Nearly ideal systems
d) Any systems

Explanation: The BP Method generally work for Narrow Boiling systems, Ideal systems and nearly ideal systems as boiling point of a component does not vary much as compared to other properties.

7 - Question

To perform a Bubble Point Test, gas is applied to
a) All the filter
b) Both side of wetted filter
c) One side of a wetted filter
d) Not specified

Explanation: To perform a Bubble Point Test, gas is applied to one side of a wetted filter, with the tubing downstream.

8 - Question

The equation below gives us the a) Reflux equation
b) Dew point equation
c) Stage efficiency equation
d) Capillary Rise equation

Explanation: The equation above gives us the Capillary Rise equation, d is the diameter of the capillary and P is the pressure applied and cos is the angle of inclination.

9 - Question

Bubble point equation is used for
a) Reflux and feed rate
b) Vapor and liquid composition
c) Venting and filtration
d) Equilibrium phases

Explanation: Bubble point equation is used for Venting and filtration purposes as the liquid evaporates the filtration of pure liquid can be achieved using condensation technique.

10 - Question

. θ (theta) stands for
a) Convergence promoter
b) Catalyst promoter
c) Dynamic value
d) Bubble Extract point