Tag: food spoilage and food preservation

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Questions Related to food spoilage and food preservation

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

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

  1. Make them tasty

  2. Use in off-season

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

  4. Keep them cool
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Food can be preserved by

  1. Low temperature

  2. High temperature

  3. Osmotic pressure

  4. All the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Articles kept in refrigerator for several days get spoilt due to

  1. Frequent electricity failures

  2. Non-killing of contaminant microorganism

  3. Slow conversion of starch to sugar

  4. Slow breakdown of vitamins and proteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Refrigeration slows down the growth of microorganisms but does not kill them. If food is kept for too long, the existing microorganisms eventually cause spoilage.

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

Temperature in deep freezers for preserving food articles is

  1. 0$^\circ$C
  2. - 4$^\circ$C
  3. - 10$^\circ$C
  4. - 18$^\circ$C
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Temperature for UHT of milk is

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ultra-High Temperature (UHT) processing of milk typically involves heating it to approximately 132-140 degrees Celsius for a very short duration, usually 1 to 2 seconds, to ensure sterilization.

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

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

  1. Food preservatives

  2. Sprayed with disinfectants

  3. Dipped in hot water

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Blanching, which involves dipping vegetables in hot water or steam for a short time, is a standard pretreatment before deep freezing to inactivate enzymes and preserve quality.

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

Cryopreservation is :

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cryopreservation is a technique used to preserve organelles, cells, tissues, or embryos by cooling them to very low temperatures, typically using liquid nitrogen.