Explore topic-wise MCQs in Food Engineering.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

When a system doesn t obey Raoult s law, the relative volatility is the ratio of the Henry s constants for the two systems.

A. True
B. False
Answer» B. False
Discussion
2.

Statement 1: Batch distillation is used for small capacity operations.
Statement 2: In food processing, batch distillation is used for desolventization.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» C. False, False
Discussion
3.

Statement 1: Boiling point concentration diagram plots y against x. (Mole fraction in gas and liquid phase respectively).
Statement 2: VLE curve plots y against x. (Mole fraction in gas and liquid phase respectively).

A. True, False
B. True, True
C. False, False
D. False, True
Answer» E.
Discussion
4.

Ethanol-water mixture is a popular example of a mixture exhibiting the typical VLE curve.

A. True
B. False
Answer» C.
Discussion
5.

Raoult s law is when mole fraction approaches zero and Henry s law is applicable when concentration approaches zero.

A. True
B. False
Answer» B. False
Discussion
6.

Statement 1: Vapour-liquid-Equilibria is related to by a simple expression of Raoult s law.
Statement 2: Raoult s law is applicable to real gases.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» B. True, True
Discussion
7.

Statement 1: Hydrogenation of fats involves liquid-gas phases only.
Statement 2: Hydrogenation of fats is known as slurry reactor system.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» E.
Discussion
8.

y0ybdy/(y-y*) gives you _____

A. Height of one transfer unit
B. Height of the entire column
C. Number of transfer units in the column
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
9.

With respect to ammonia-water system
Statement 1: Limiting ratio is when the __(1)___ will meet __(2)__

A. nStatement 2: When the flow rate of liquid is high, the distance between (1) and (2) decreases.
B. Operating line will meet Equilibrium curve, false
C. Equilibrium curve will meet Equilibrium line, true
D. Operating line will meet Equilibrium line, true
E. All of the mentioned
Answer» B. Operating line will meet Equilibrium curve, false
Discussion
10.

When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)
Statement 1: q<1 means the slope is a horizontal line.

A. nStatement 2: q&lt;1 means the slope is a vertical line.
B. True, False
C. True, True
D. False, False
E. False, True
Answer» D. False, False
Discussion
11.

When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)
Statement 1: q<1 means the liquid is sub-cooled.

A. nStatement 2: q&lt;0 means the liquid is super heated vapor.
B. True, False
C. True, True
D. False, False
E. False, True
Answer» E. False, True
Discussion
12.

Statement 1: Bubble point means the feed is at saturated vapor.
Statement 2: Dew point means the feed is at boiling point.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» D. False, True
Discussion
13.

The feed line tells us that a particular feed A is at a sub-cooled liquid. Which of the following explains the above statement?

A. The liquid is at its boiling point
B. None of the mentioned
C. A liquid below its boiling temperature
D. The liquid is a mixture of boiling and some vapors
Answer» D. The liquid is a mixture of boiling and some vapors
Discussion
14.

In re-fluxing, the re-flux ratio needs to a minimum.

A. True
B. False
Answer» C.
Discussion
15.

Which of the following is a process/method to enhance the amount of pure distillate?

A. Rectification
B. Stripping
C. Re-fluxing
D. All of the mentioned
Answer» E.
Discussion