Engineering Questions with Answers - Multiple Choice Questions
Food Engineering MCQ’s – Principles of Food Freezing-1
1 - Question
Statement 1: Freezing with nitrogen or carbon dioxide gas is rapid freezing.
Statement 2: Super cooling is a property of food products.
a) True, False
b) True, True
c) False, False
d) False, True
View Answer
Explanation: Freezing with nitrogen or carbon dioxide gas is rapid freezing. Super cooling is a property of food products.
2 - Question
Statement 1: When food items are frozen, there is a drop in temperature followed by a further drop when they freeze.
Statement 2: Fish should be rapidly frozen, not slowly frozen.
a) True, False
b) True, True
c) False, False
d) False, True
View Answer
Explanation: When food items are frozen, there is a drop in temperature due to super cooling followed by a rise in temperature when they freeze.
3 - Question
Statement 1: Certain definitions define bound water as water that doesn’t freeze at -20 deg C.
Statement 2: Free water shows the properties of liquid water. The free water content of any food item should be less to improve storage.
a) True, False
b) True, True
c) False, False
d) False, True
View Answer
Explanation: Certain definitions define bound water as water that doesn’t freeze at -20 deg C. Free water shows the properties of liquid water. The free water content of any food item should be less to improve storage.
4 - Question
When the crystallization process takes place for a long time, the size of the crystals is _____
a) Small
b) Large
c) No crystals formed
d) None of the mentioned
View Answer
Explanation: When the crystallization process takes place for a long time, the size of the crystals is large.
5 - Question
Ice crystals in frozen meat should be formed by rapid crystallization.
a) True
b) False
View Answer
Explanation: Ice crystals in frozen meat should be formed by rapid crystallization because rapidly formed ice crystals, when thawed, are absorbed by the meat. Large ice crystals which are formed due to prolonged crystallization damage the tissue of the meat and when they melt, the structure of the meat is not restored.
6 - Question
Statement 1: When sugar is added to water, water does not or negligibly expands.
Statement 2: Jams do not expand on solidifying.
a) True, False
b) True, True
c) False, False
d) False, True
View Answer
Explanation: When sugar is added to water, water does not or negligibly expands. Jams do not expand on solidifying.
7 - Question
The heat required to bring down the temperature of the food is directly proportional to _____
a) Specific heat of the food
b) Weight of the food
c) Temperature difference
d) All of the mentioned
View Answer
Explanation: All of the mentioned are directly proportional to the heat required to bring down the temperature of the food
8 - Question
Heat loss in the storage chamber of foods is in which of the following forms?
a) Heat loss from the walls of the chamber
b) Heat loss due to opening and closing of the frozen food chamber
c) Heat loss due to the person in charge of the maintenance
d) All of the mentioned
View Answer
Explanation: Heat loss in the storage chamber of foods is via all of the mentioned ways.
9 - Question
Work required in maintaining a chamber at a certain temperature is dependent on _____
a) Temperature of outside air
b) Surface area of the storage chamber
c) Amount and kind of insulation material
d) All of the mentioned
View Answer
Explanation: All of the mentioned are factors on which work required in maintaining a chamber at a certain temperature is dependent on.
10 - Question
Which of the following is true about packaging food prior to freezing?
a) Insulates the food
b) Controls dehydration
c) Insulates the food & Controls dehydration
d) Neither of the mentioned
View Answer
Explanation: Both of the mentioned are true about packaging food prior to freezing.
11 - Question
Which of the following is a result of freezer burn?
a) Irreversibly changes color, texture, flavor and nutritive values of frozen foods
b) Roast beef turns light brown
c) Dehydration of food items takes place
d) All of the mentioned
View Answer
Explanation: All of the mentioned are results of freezer burn.