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.

Which of the following needs to be taken care of during scale up of crystallizers?

A. Reynolds number
B. Residence time
C. Power supplied to agitator per unit volume
D. All of the mentioned
Answer» E.
Discussion
2.

In making of cocoa butter via crystallization, liquid is the desired product.

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

Statement 1: T-joints in pipelines for crystallization should be avoided as much as possible.
Statement 2: Thin liquids should have a slope to drain off liquid.

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

Automated valves should be avoided.

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

Statement 1: Incrustation may lead to under deposit-corrosion.
Statement 2: Scrapers can be used as an agitated medium to avoid incrustation.

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

Incrustation leads to _____

A. Affects safety
B. Damages equipment
C. Affects product quality
D. All of the mentioned
Answer» E.
Discussion
7.

Excess nucleation leads to _____

A. Non-uniform CSD
B. In huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization
C. Non-uniform CSD, in huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
8.

What does excess supersaturating followed by cooling lead to?

A. Primary nucleation
B. Secondary nucleation
C. Both, nucleation and crystal growth in general
D. None of the mentioned
Answer» B. Secondary nucleation
Discussion
9.

Heating on the surface of a heat exchanger leads to fouling.

A. True
B. False
Answer» B. False
Discussion
10.

High residence time encourages _____

A. Attrition
B. Crystal growth
C. Attrition & Crystal growth
D. None of the mentioned
Answer» B. Crystal growth
Discussion
11.

Draft tubes _____ crystal-crystal attrition. Crystals _____ bottom.

A. Increase, should be kept on
B. Increase, should be kept off
C. Decrease, should be kept on
D. Decrease, should be kept off
Answer» E.
Discussion
12.

Secondary nucleation involves the collision of crystals.

A. True
B. False
Answer» B. False
Discussion
13.

Advantage of Draft tube baffles crystallizer _____

A. Re-circulation of a small fraction of mother liquor
B. Selectively separates big particles from the smaller ones
C. All of the mentioned
D. None of the mentioned
Answer» C. All of the mentioned
Discussion
14.

Work of Draft tube in Draft tube baffle crystallizer is _____

A. Maintaining good circulation rate for slurry
B. Reducing energy requirement for mixing
C. Maintaining good circulation rate for slurry & reducing energy requirement for mixing
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
15.

Statement 1: Forced circulation liquid evaporator-crystallizer has good CSD control.
Statement 2: Draft tube baffle crystallizer is flash evaporated for crystallization.

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