Food Engineering

Principles of Food Irradiation-2

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Irradiation _____ the relative viscosity of albumin in solutions.
Increases
Decreases
Remains constant
None of the mentioned
Explanation:
Irradiation increases the relative viscosity of albumin in solutions.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is important in estimating decimal reduction dose (D value)?
Observations made in the food itself
Desirable to experiment with the largest feasible initial number of cells and to follow their destruction to the lowest level which can be observed within the limits of statistical significance
Observations made in the food itself and desirable to experiment with the largest feasible initial number of cells and to follow their destruction to the lowest level which can be observed within the limits of statistical significance
Neither of the mentioned
Explanation:
Both of the mentioned are important in estimating decimal reduction dose (D value).
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Ionizing radiation _____ the thickness of albumin.
Increases
Decreases
Remains constant
None of the mentioned
Explanation:
Ionizing radiation decreases the thickness of albumin, but increases the relative viscosity of albumin in solutions.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Container shape plays an important role for radiation source utilization.
True
False
Explanation:
Container shape plays an important role for radiation source utilization.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Radiation has no influence in promoting tin rot or tin disease.
True, False
True, True
False, False
False, True
Explanation:
Radiation has no influence in promoting tin rot or tin disease. Tin coatings over base steel are suitable for food irradiation.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Very young chickens can also be irradiated. This is an advantage of irradiation.
False, Synthesis of vitamin C
False, Aging of wines
False, Increasing the yield of crops
All of the mentioned
Explanation:
Very young chickens cannot be irradiated as it leads to fragile bones. All of the mentioned are examples of ionizing radiation as a unit operation in the field of food and agriculture.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Effects of radiation and heat are the same on milk; that is they both influence the rennet coagulation time.
True, Water
True, Calcium
False, Fat
False, Calcium
Explanation:
Effects of radiation and heat are the same on milk; that is they both influence the rennet coagulation time. Calcium balance is important in condensing and canning process.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Radiation sterilization might be used for baking since it indicates that the baking quality of eggs is not impaired during doses of ionizing radiations.
True, activated
True, inactivated
False, no change observed
All of the mentioned
Explanation:
Radiation sterilization might be used for baking since it indicates that the baking quality of eggs is not impaired during doses of ionizing radiations. Enzymes are inactivated by ionizing radiations.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
With respect to which of the following properties of food does food irradiation prove a disadvantage?
Flavor
Tenderness
Microbial growth
All of the mentioned
Explanation:
Food irradiation has proved as a disadvantage in the flavor of food. It leads to off-flavor of food.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: Plastic films and other foils might get damaged due to irradiation.
True, False
True, True
False, False
False, True
Explanation:
Plastic films and other foils might get damaged due to irradiation. By increasing the radiation dose by a two-fold, the resistance of certain organisms to irradiation increases.