Q. How long can opened canned foods be safely stored in the refrigerator?
A.
1-2 days
B.
3-5 days
C.
1 week
D.
2 weeks
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Solution
Opened canned foods can typically be stored safely in the refrigerator for 3-5 days.
Correct Answer:
B
— 3-5 days
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Q. What is a safe method to heat canned foods?
A.
Microwave without stirring
B.
Boiling in water
C.
Directly on a stovetop flame
D.
Leaving at room temperature
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Solution
Microwaving canned foods is safe if stirred and heated evenly to the recommended temperature.
Correct Answer:
B
— Boiling in water
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Q. What is the best practice for storing opened canned foods?
A.
Leave in the can at room temperature
B.
Transfer to a glass or plastic container
C.
Re-seal the can with tape
D.
Store in the original can in the fridge
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Solution
Opened canned foods should be transferred to a glass or plastic container to prevent chemical leaching and preserve quality.
Correct Answer:
B
— Transfer to a glass or plastic container
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Q. What is the effect of heating acidic canned foods?
A.
Increases shelf life
B.
Decreases nutrient absorption
C.
May cause chemical leaching from the can
D.
Enhances flavor
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Solution
Heating acidic canned foods can cause chemical leaching from the can, which may pose health risks.
Correct Answer:
C
— May cause chemical leaching from the can
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Q. What is the primary concern when heating canned foods?
A.
Nutrient loss
B.
Bacterial growth
C.
Chemical leaching
D.
Texture change
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Solution
Heating canned foods improperly can lead to bacterial growth, especially if the can is damaged or the food is not heated to the appropriate temperature.
Correct Answer:
B
— Bacterial growth
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Q. What is the recommended internal temperature for safely heating canned foods?
A.
60°C (140°F)
B.
75°C (167°F)
C.
85°C (185°F)
D.
100°C (212°F)
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Solution
Canned foods should be heated to an internal temperature of at least 75°C (167°F) to ensure safety.
Correct Answer:
B
— 75°C (167°F)
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Q. What should you do if a can of food is leaking?
A.
Heat it before opening
B.
Discard it immediately
C.
Rinse the can and use it
D.
Store it in the refrigerator
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Solution
A leaking can should be discarded immediately as it may indicate contamination.
Correct Answer:
B
— Discard it immediately
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Q. Which bacteria is most commonly associated with improperly canned foods?
A.
E. coli
B.
Salmonella
C.
Clostridium botulinum
D.
Listeria monocytogenes
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Solution
Clostridium botulinum is a bacterium that can produce toxins in improperly canned foods, leading to botulism.
Correct Answer:
C
— Clostridium botulinum
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Q. Why should dented or bulging cans be avoided?
A.
They are more expensive
B.
They may contain preservatives
C.
They can indicate bacterial contamination
D.
They have a shorter shelf life
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Solution
Dented or bulging cans can indicate that the food inside may be contaminated with bacteria, making them unsafe to consume.
Correct Answer:
C
— They can indicate bacterial contamination
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