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Food Engineering Practice Test: Principles of Food Irradiation
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The principle of food irradiation is based on the chemical changes that ionizing radiation causes in food.  Food irradiation involves passing food through a radiation field so it can absorb the desired radiation energy. The food never comes into contact with the radioactive material.  Food irradiation can: Control foodborne pathogens Reduce microbial load and insect infestation Inhibit the germination of root crops Extend the durable life of perishable produce  Food irradiation can also inhibit sprouting in vegetables like potatoes and delay ripening in some fruits.  The three types... Show more
Food Engineering Practice Test: Principles of Food Irradiation
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25 Questions

1. Irradiation _____ the relative viscosity of albumin in solutions.
2. Which of the following is a production control dosimeter?
3. Statement 1: Plastic films and other foils might get damaged due to irradiation.

Statement 2: By increasing the radiation dose by a two-fold, the resistance of certain organisms to irradiation increases.
4. Which of the following is true about ferrous sulphate dosimeter?
5. Which of the following dosimeters are used?
6. Which of the following reasons is why machine produced ionizing radiations are preferred over fission products?
7. With respect to which of the following properties of food does food irradiation prove a disadvantage?
8. Which of the following is correct about beta particles?
9. Statement 1: When matter is traversed by any of the forms of ionizing radiations, _____

Statement 2: Ionization radiations produce _____
10. Which of the following is given by the Herschman Equation?
11. Statement 1: The microbial deterioration of fresh fish is _____ by irradiation.

Statement 2: The _____ of oxygen increases the sensitivity of vegetative bacteria to irradiation by two-three folds.
12. Statement 1: It is safe to consume radiation stabilized food processed with gamma photons of less than 2.3 M electron volt.

Statement 2: Provisions must be made to limit neutron fluxes in all radiation sources.
13. Which of the following is correct about alpha particles?
14. Ion pair production by ionizing radiations is more efficient than the thermal process.
15. Statement 1: Freezing to temperatures of -20 deg C or lower reduces the radiation effects in the food.

Statement 2: Sensitizing compounds or microorganisms to radiation will help fasten the process and make it more efficient.
16. What change does ionizing radiation produce in milk casein?
17. Low dose irradiation has a potential to extend the shelf-life of certain food items but very low doses shows predominant mold formation.
18. Statement 1: Radiation has no influence in promoting tin rot or tin disease.

Statement 2: Tin coatings over base steel are suitable for food irradiation.
19. In which of the following ways does absorption of gamma radiation take place?
20. Container shape plays an important role for radiation source utilization.
21. Statement 1: _____ radiation is also called cathode radiation.

Statement 2: In _____ radiation, spent fuel elements are used.
22. Ionizing radiation _____ the thickness of albumin.
23. 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.

Statement 2: Enzymes are _____ by ionizing radiations.
24. Viruses can be eliminated by irradiation.
25. Statement 1: Very young chickens can also be irradiated. This is an advantage of irradiation.

Statement 2: Which of the following is an example of ionizing radiation as a unit operation in the field of food and agriculture?

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