Tag: methods of preserving food

Questions Related to methods of preserving food

Food products are kept in cold storage or refrigerator in order to

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Make them tasty

  2. Use in off-season

  3. Maintenance of freshness, longevity and taste due to low respiration

  4. Keep them cool

Show answer
Correct Option: C
Explanation:

Respiration uses stored starch and enhances ageing process. Food products like fruits and vegetables are kept in cold storage or refrigerator to maintain its freshness, longevity and taste. This is possible due to low respiration rate at low temperature. 

Thus, the correct answer is option C.

Food can be preserved by

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Low temperature

  2. High temperature

  3. Osmotic pressure

  4. All the above

Show answer
Correct Option: A
Explanation:

Respiration uses stored starch and enhances ageing process. Food products like fruits and vegetables are preserved by keeping them at low temperature to maintain its freshness, longevity and taste. This is possible due to low respiration rate at low temperature. 

So, the correct answer is 'Low temperature'

Why are raw foods kept below in refrigerators while cooked foods are kept above

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. For proper handling and storage

  2. Cooked food requires 5C while raw foods require 10C for low temperature preservation

  3. Cooked food stays fresh at 3C while raw foods do so at 5C

  4. Cooked food remains fresh for longer 4| period at 5C while raw foods do so at 3C

Show answer
Correct Option: C
Explanation:

Bacteria can grow in the cooked food from 5C to 60C. So, it is better to store cooked food at 3C whereas raw food at 5C.

That is why cooked food places above and the raw food is placed below in the refrigerators.
So the correct option is C.

Safe refrigeration period is

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. 1-2 days

  2. 2 - 3 days

  3. 2 - 4 days

  4. 3-6 days

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Correct Option: D

Articles kept in refrigerator for several days get spoilt due to

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Frequent electricity failures

  2. Non-killing of contaminant microorganism

  3. Slow conversion of starch to sugar

  4. Slow breakdown of vitamins and proteins

Show answer
Correct Option: B

Temperature in deep freezers for preserving food articles is

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. 0$^\circ$C

    • 4$^\circ$C
    • 10$^\circ$C
    • 18$^\circ$C
Show answer
Correct Option: D
Explanation:

Food stored at or below −18 °C (0 °F) is safe to avoid bacterial growth. Most household freezers maintain temperatures from −23 to −18 °C.

Temperature for UHT of milk is

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. 95$^0$C for 10 seconds

  2. 110$^0$C  for ten seconds

  3. 132$^0$C for one second

  4. 132$^0$C for ten seconds

Show answer
Correct Option: C

Raw vegetables to be preserved in deep freezers must be pretreated with

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Food preservatives

  2. Sprayed with disinfectants

  3. Dipped in hot water

  4. All of the above

Show answer
Correct Option: C

Cryopreservation is :

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Preservation of living beings in chemicals.

  2. Preservation at very low temperature.

  3. Preservation through exposure to irradiation.

  4. Preservation through use of gases

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Correct Option: B

Cryogenic storage of germ plasm is done at.

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. $4$ degrees C

  2. $-10$ degrees C

  3. $-40$ degrees C

  4. $-196$ degrees C

Show answer
Correct Option: A