Science General · Chemistry
Food Processing and Storage
2,379 Questions
Food processing and storage principles focus on preservation techniques, packaging methods, and preventing microbial contamination. These topics are essential for general science sections in various competitive examinations. Questions explore pasteurization, canning, chemical preservation, and safe food handling practices.
Food preservation methodsPasteurization techniquesFood packaging materialsMicrobial contamination preventionCryopreservation concepts
Food Processing and Storage Questions
Which of the following group of preservatives prevent fat/oil containing food from developing a foul smell?
-
Flavourants
-
Colorants
-
Sweeteners
-
Antioxidants
D
Correct answer
Explanation
Antioxidants prevent or slow down the oxidation of fat/oil which otherwise go rancid to emit a foul odor. This they are used as preservatives in oil or fat containing food.
So, the correct option is 'Antioxidants'.
Which of the following is/are true regarding rancidity?
-
On keeping for long time, the oxidation of oils and fats, changes the taste and odour of food.
-
To prevent rancidity, food is stored in air tight containers.
-
Rancidity can also be prevented by addition of antioxidants.
-
To prevent rancidity, packed food items are flushed with an inert gas like nitrogen.
A,B,C,D
Correct answer
Explanation
The following are true regarding rancidity. On keeping for long time,
the oxidation of oils and fats, changes the taste and odor of food and
makes them unfit for consumption. To prevent rancidity, food is stored in air tight containers. Rancidity can also be prevented by addition of antioxidants. To prevent rancidity, packed food items are flushed with an inert gas like nitrogen.
The main cause of rancidity in foods is:
-
bacteria
-
proteins
-
antioxidants
-
oxidation of the fatty acid molecule
D
Correct answer
Explanation
The condition produced by aerial oxidation of fats and oils in food, due to which unpleasant taste and smell occurs is called as rancidity.
The term used to indicate the development of unpleasant smell and taste in fat and oil-containing foods due to aerial oxidation is:
-
acidity
-
radioactivity
-
rabidity
-
rancidity
D
Correct answer
Explanation
The term used to indicate the development of unpleasant smell and taste in fat and oil containing foods due to aerial oxidation is rancidity.
The process of oxidizing fatty and oily substances is called as rancidity.
Rancidity can be prevented by -
-
adding anti-oxidants
-
packing oily food in nitrogen gas
-
packing oily food in argon gas
-
use of spices
A,B,D
Correct answer
Explanation
Rancidity is decomposition of oils, fats and lipids. It normally happens when food items are stored for a long time and gets exposed to oxygen.. Rancidity can be prevented by adding anti-oxidants, vacuum packing, replacing air by nitrogen, refrigeration of the food-stuff or packaging of food items in airtight containers.
If edible oil is allowed to stand for a long time in an iron or tin container, the oil becomes rancid.
A
Correct answer
Explanation
If edible oil is allowed to stand for a long time in an iron or tin container the fatty acids in the oil react with rust flakes or powder to form salts. These salts contaminate the oil and hence the oil becomes rancid. Thus the above statement is true.
The foods most often associated with food poisoning are:
-
Raw poultry and meat
-
Unpasteurized milk
-
Fresh produce
-
All of the above
D
Correct answer
Explanation
Explanation: You can also get enteritis when you come into close contact with other people or animals that are infected. This is less common.
Which type of warehousing is commonly used for storing perishable goods?
-
Cold storage
-
Dry storage
-
Ambient storage
-
Bulk storage
A
Correct answer
Explanation
Cold storage is commonly used for storing perishable goods, as it helps to maintain a low temperature to prevent spoilage.
Which of the following is NOT a common type of fruit tree storage method?
-
Cold Storage
-
Controlled Atmosphere Storage
-
Modified Atmosphere Packaging
-
Canning
D
Correct answer
Explanation
Canning is not a common type of fruit tree storage method. Cold Storage, Controlled Atmosphere Storage, and Modified Atmosphere Packaging are all common methods used to store fruit.
What is the process of preserving fruit by heating it to a high temperature and then sealing it in a container called?
-
Canning
-
Freezing
-
Drying
-
Pickling
A
Correct answer
Explanation
Canning is the process of preserving fruit by heating it to a high temperature and then sealing it in a container.
What is the best way to store baked goods?
-
In an airtight container at room temperature
-
In an airtight container in the refrigerator
-
In an airtight container in the freezer
-
Any of the above
Correct answer
Explanation
The best way to store baked goods depends on the type of baked good and how long you want to store it. Cakes and cookies can be stored in an airtight container at room temperature for up to 3 days. Breads can be stored in an airtight container at room temperature for up to 2 days, or in the refrigerator for up to 5 days. Baked goods can also be stored in an airtight container in the freezer for up to 3 months.
What is the best way to store yeast?
-
In an airtight container in the refrigerator
-
In an airtight container in the freezer
-
In a cool, dark place
-
Any of the above
A
Correct answer
Explanation
The best way to store yeast is in an airtight container in the refrigerator. This will help to keep the yeast fresh and active for up to 2 weeks.
What is the recommended way to store food while camping to prevent attracting wildlife?
-
In a cooler with ice
-
In a sealed plastic container
-
In a metal container
-
Hanging from a tree
C
Correct answer
Explanation
Storing food in a metal container is the most effective way to prevent wildlife from accessing it, as they cannot chew through metal.
What is the process of preserving pickles called?
-
Pickling
-
Fermentation
-
Canning
-
Freezing
A
Correct answer
Explanation
Pickling is the process of preserving food in a brine or vinegar solution, which inhibits the growth of bacteria and extends the shelf life of the food.
What is the primary role of vinegar in pickle making?
-
Preservation
-
Flavoring
-
Coloring
-
Sweetening
A
Correct answer
Explanation
Vinegar is used in pickle making primarily for its preservative properties. It creates an acidic environment that inhibits the growth of bacteria and extends the shelf life of the pickles.