Food Irradiation MCQs : This section focuses on the "Food Irradiation". These Multiple Choice Questions (MCQs) should be practiced to improve the Food Irradiation skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Container shape plays an important role for radiation source utilization.
A. TRUE
B. FALSE
Question 2
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
Question 3
Ion pair production by ionizing radiations is more efficient than the thermal process.
A. TRUE
B. FALSE
Question 4
Ionizing radiation _____ the thickness of albumin.
A. Increases
B. Decreases
C. Remains constant
D. None of the mentioned
Question 5
Irradiation _____ the relative viscosity of albumin in solutions.
A. Increases
B. Decreases
C. Remains constant
D. None of the mentioned
Question 6
Low dose irradiation has a potential to extend the shelf-life of certain food items but very low doses shows predominant mold formation.
A. TRUE
B. FALSE
Question 7
Viruses can be eliminated by irradiation.
A. TRUE
B. FALSE
Question 8
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
Question 9
Which of the following dosimeters are used?
A. Primary standard
B. Operating standard
C. Production control devices
D. All of the mentioned
Question 10
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
Question 11
Which of the following is a production control dosimeter?
A. Cobalt glass
B. Colored plastic tapes
C. Ferrous dosimeters
D. All of the mentioned
Question 12
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
Question 13
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
Question 14
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
Question 15
Which of the following is important in estimating decimal reduction dose (D value)?
A. Observations made in the food itself
B. 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
C. 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
D. Neither of the mentioned
Question 16
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
Question 17
Which of the following is true with respect to irradiation for fresh fish?
A. The odor caused by volatile formed in irradiated fresh fish decreases with storage time if the product is packed in a gas permeable container
B. The expected shelf life at a given storage temperature would depend on the radiation dose
C. None of the mentioned
D. Neither of the mentioned
Question 18
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
Question 19
With respect to which of the following properties of food does food irradiation prove a disadvantage?
A. Flavor
B. Tenderness
C. Microbial growth
D. All of the mentioned