Explore topic-wise MCQs in Food Engineering.

This section includes 10 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.

Rayleigh number is _____

A. Product of schmidst and grashof number
B. Total mass transferred by mass transferred due to molecular diffusion
C. Product of schmidst and reynold number
D. None of the mentioned
Answer» B. Total mass transferred by mass transferred due to molecular diffusion
Discussion
2.

Sherwood number is _____

A. Product of schmidst and grashof number
B. Total mass transferred by mass transferred due to molecular diffusion
C. Product of schmidst and reynold number
D. None of the mentioned
Answer» C. Product of schmidst and reynold number
Discussion
3.

Which of the following is also called Oxygen balancing method?

A. Dynamic gassing out method
B. Static method
C. Sulphite oxidation method
D. None of the mentioned
Answer» C. Sulphite oxidation method
Discussion
4.

Which of the following is not a measuring technique of KLa?

A. Dynamic gassing out method
B. Static method
C. Sulphite oxidation method
D. None of the mentioned
Answer» E.
Discussion
5.

Statement 1: KLa is measured together and not separately.

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

Which theory proposes that the film is continuously getting renewed and replaced by the bulk liquid?

A. Film theory
B. Penetration theory
C. Surface renewal theory
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
7.

Statement 1: In film theory, mass transfer coefficient is proportional to D1/2
Statement 2: Penetration theory states that all elements are exposed at the same time which is unrealistic.

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

Statement 1: Penetration theory states that mass transfer coefficient is directly proportional to diffusivity coefficient which was later proved wrong.
Statement 2: Penetration theory states that mass transfer is based on unsteady mass transfer.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» E.
Discussion
9.

The existence of a thick constant film between two phases is a proposal by which of the following theories?

A. Film theory
B. Penetration theory
C. Surface renewal theory
D. All of the mentioned
Answer» B. Penetration theory
Discussion
10.

Statement 1: Concentration is a product of diffusivity and solubility.
Statement 2: Permeability coefficient in case of food packaging can be written as product of partial pressure and solubility using Henry s law.

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