Food Engineering

Principles of Food Irradiation-1

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is correct about alpha particles?
High ionization due to relative size and carrying of double positive charge
Low penetration power
In air, they have a range of few centimeters
All of the mentioned
Explanation:
All of the mentioned is correct about alpha particles.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is true about ferrous sulphate dosimeter?
It is the most standard dosimeters. Radiation ionizes water forming H20+. This dissociates into OH- and H+ ion
The formation of Fe+++ is the key effect which permits the determination of the radiation dose
Determination of ferric ion concentration gives a direct measure of energy absorbed
All of the mentioned
Explanation:
All of the mentioned is true about ferrous sulphate dosimeter.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: _____ induce radioactivity in food items.
Protons, False
Electrons, False
Neutrons, True
Any of the mentioned, True
Explanation:
Neutrons induce radioactivity in food items. Variations in dose distributions in many types of containers and with all types of sources range between 100-125%.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
In which of the following ways does absorption of gamma radiation take place?
Photoelectric effect
Compton effect
Pair production
All of the mentioned
Explanation:
The absorption of gamma radiation takes place in all of the mentioned ways.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Which of the following dosimeters are used?
Primary standard
Operating standard
Production control devices
All of the mentioned
Explanation:
All of the mentioned dosimeters are used.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following fact about radiation/ irradiation is true?
All food items consumed by man are radioactive
Alpha and beta particles and gamma photons are the radiations available for food preservation applications
Energy lost per ion pair formed is greater than the ionization energy
All of the mentioned
Explanation:
All of the mentioned is true about radiation/ irradiation.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Statement 1: _____ radiation is also called cathode radiation.
Alpha, beta
Gamma, alpha
Beta, gamma
All of the mentioned
Explanation:
Beta radiation is also called cathode radiation. In gamma radiation, spent fuel elements are used.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is correct about beta particles?
High specific ionization ability
Low penetrating power
Higher ionization ability than gamma radiation
All of the mentioned
Explanation:
Beta particles have low specific ionization ability and high penetrating power. They’ve higher ionization ability than gamma radiation.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which of the following reasons is why machine produced ionizing radiations are preferred over fission products?
Fission products require extensive shielding and dose supplied may be so high that prolonged exposure times are required
Machine produced radiations are unidirectional and can be turned off
None of the mentioned
Neither of the mentioned
Explanation:
The mentioned are reasons why machine produced ionizing radiations are preferred over fission products.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a production control dosimeter?
Cobalt glass
Colored plastic tapes
Ferrous dosimeters
All of the mentioned
Explanation:
Cobalt glass and ferrous dosimeters are operating standard dosimeters. Colored plastic tapes and colored marking on containers are production control dosimeters.