Food Engineering Questions and Answers – Principles of Food Irradiation-1

This set of Food Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Principles of Food Irradiation-1”.

1. Which of the following fact about radiation/ irradiation is true?
a) All food items consumed by man are radioactive
b) Alpha and beta particles and gamma photons are the radiations available for food preservation applications
c) Energy lost per ion pair formed is greater than the ionization energy
d) All of the mentioned
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2. Which of the following is correct about alpha particles?
a) High ionization due to relative size and carrying of double positive charge
b) Low penetration power
c) In air, they have a range of few centimeters
d) All of the mentioned
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3. Which of the following is correct about beta particles?
a) High specific ionization ability
b) Low penetrating power
c) Higher ionization ability than gamma radiation
d) All of the mentioned
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4. In which of the following ways does absorption of gamma radiation take place?
a) Photoelectric effect
b) Compton effect
c) Pair production
d) All of the mentioned
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5. Statement 1: _____ radiation is also called cathode radiation.
Statement 2: In _____ radiation, spent fuel elements are used.
a) Alpha, beta
b) Gamma, alpha
c) Beta, gamma
d) All of the mentioned
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6. Which of the following reasons is why machine produced ionizing radiations are preferred over fission products?
a) Fission products require extensive shielding and dose supplied may be so high that prolonged exposure times are required
b) Machine produced radiations are unidirectional and can be turned off
c) None of the mentioned
d) Neither of the mentioned
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7. Which of the following dosimeters are used?
a) Primary standard
b) Operating standard
c) Production control devices
d) All of the mentioned
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8. Which of the following is a production control dosimeter?
a) Cobalt glass
b) Colored plastic tapes
c) Ferrous dosimeters
d) All of the mentioned
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9. Which of the following is true about ferrous sulphate dosimeter?
a) It is the most standard dosimeters. Radiation ionizes water forming H20+. This dissociates into OH- and H+ ion
b) The formation of Fe+++ is the key effect which permits the determination of the radiation dose
c) Determination of ferric ion concentration gives a direct measure of energy absorbed
d) All of the mentioned
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10. Statement 1: _____ induce radioactivity in food items.
Statement 2: Variations in dose distributions in many types of containers and with all types of sources range between 100-125%.
a) Protons, False
b) Electrons, False
c) Neutrons, True
d) Any of the mentioned, True
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11. Which of the following is given by the Herschman Equation?
a) Maximum radioactivity which cannot be produced in a foodstuff which has been isotope formed
b) Percentage composition of food in regard to isotope’s parent atom
c) All of the mentioned
d) Neither of the mentioned
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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.
a) True, False
b) True, True
c) False, False
d) False, True
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13. Statement 1: When matter is traversed by any of the forms of ionizing radiations, _____
Statement 2: Ionization radiations produce _____
a) Energy is absorbed, negligible temperature rise
b) Ion pairs are not produced, chemical changes in irradiated materials
c) Energy is absorbed, chemical changes in irradiated materials
d) Neither of the mentioned, neither of the mentioned
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14. Ion pair production by ionizing radiations is more efficient than the thermal process.
a) True
b) False
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15. What change does ionizing radiation produce in milk casein?
a) Increase in rennet coagulation
b) Reduction of its stability to heat
c) Increase in rennet coagulation & Reduction of its stability to heat
d) Neither of the mentioned
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Sanfoundry Global Education & Learning Series – Food Engineering.

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