Explore topic-wise MCQs in Food Engineering.

This section includes 9 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.

With respect to dipping oil emulsions, which of the following is true?

A. Used for easy dehydration of food
B. Gives a thin layer of coating on the fruit berries
C. Dipping oil made from an emulsion by mixing of fatty esters with some amount of aqueous potassium carbonate solutions by high speed impellers
D. All of the mentioned
Answer» E.
Discussion
2.

Which of the following is true with respect to Carbonation?

A. Gas-liquid mixing
B. Helps improve storage life
C. Increased pressure
D. All of the mentioned
Answer» E.
Discussion
3.

Statement 1: Flat blade/curve blade/arrow head/vaned disc turbines are generally used for gas-liquid mixing.
Statement 2: Helical screw/ribbon mixer/gate anchor are generally used for solid-solid mixing.

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

Statement 1: Where Pg is power for a gassed system and Po is power for an ungassed system, Pg/Po is _____
Statement 2: Na stands for _____

A. < 1, aeration number
B. > 1, aeration number
C. < 1, consistency index
D. > 1, consistency index
Answer» B. > 1, aeration number
Discussion
5.

Statement 1: For non-Newtonian fluids, another term called apparent viscosity is used as their viscosity changes with the change in the shear rate.
Statement 2: For non-Newtonian fluids, between the transition region, the power number for non-Newtonian fluids is slightly higher than that for Newtonian fluids.

A. True, False
B. True, True
C. False, False
D. False, True
Answer» B. True, True
Discussion
6.

Statement 1: In the transient zone, the power input depends on the density and viscosity of the fluid.
Statement 2: In the laminar zone, the power input depends on the density only. It is independent of the viscosity of the fluid.

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

With respect to the relationship between the power number and the impeller Reynolds s number, which amongst the following statements is true?

A. In the turbulent region, the N<sub>Re,i</sub> has no impact over N<sub>Po</sub>
B. In the transient region, the N<sub>Re,i</sub> has no impact over N<sub>Po</sub>
C. In the laminar region, the N<sub>Po</sub> continually falls as N<sub>Re,i</sub> increases
D. None of the mentioned
Answer» B. In the transient region, the N<sub>Re,i</sub> has no impact over N<sub>Po</sub>
Discussion
8.

Statement 1: Froude number relates the gravitational effect which is important when the liquid is agitated by an impeller.
Statement 2: When NRe,i < 300, NFr is ineffective.

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

Which of the following is NOT an application of mixing solids in the food industry?

A. Biscuit/bakery making
B. Poultry and cattle feed
C. Chips and snacks industry
D. None of the mentioned
Answer» E.
Discussion