Tag: evs - i

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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.

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

It is unwise to thaw meats

  1. In a microwave oven

  2. In the refrigerator

  3. Under cool running water

  4. At room temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Meat, poultry and their products are perishable food as they get easily spoiled. Thus, they must be kept at a safe temperature during thawing. They are safe indefinitely while frozen. Perishable foods should never be thawed on the counter or in hot water and must not be left at room temperature for more than two hours but at temperature 40 °F or below for safety of products.
Therefore, the correct answer is option D.
Multiple choice evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

The main purpose of dehydration of food is ______________.

  1. To increase the microbial activity

  2. To decrease the microbial activity

  3. To reduce the moisture content

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Dehydration is an ancient technique of level preservative which is performed by extracting moisture hence inhibiting the growth of microorganisms which may lead to several diseases.
Thus decreasing microbial activity and reducing the moisture content.