RSO Radiation Biology and Health Effects 2

Question 1

The term 'effective dose' accounts for which two factors beyond absorbed dose?

Accepted Answer

Radiation weighting factor and tissue weighting factor

Answer

Energy and time

Answer

Distance and shielding

Answer

Dose rate and exposure duration

Question 2

Which of the following is a deterministic radiation effect?

Accepted Answer

Cataract of the eye lens

Answer

Leukemia

Answer

Thyroid cancer

Answer

Hereditary mutations

Question 3

In radiobiology, the 'four Rs' of radiobiology include repair, reoxygenation, redistribution, and:

Accepted Answer

Repopulation

Answer

Reproduction

Answer

Resistance

Answer

Regulation

Question 4

The tissue weighting factor (wT) for the gonads in ICRP Publication 103 is:

Accepted Answer

0.08

Answer

0.20

Answer

0.12

Answer

0.05

Question 5

Which radiation-induced DNA lesion is considered the most biologically significant for cell killing and carcinogenesis?

Accepted Answer

Double-strand break

Answer

Single-strand break

Answer

Base damage

Answer

Cross-link with protein

Question 6

A radiation worker receives an equivalent dose of 50 mSv to the lens of the eye in one year. According to current ICRP guidance, this:

Accepted Answer

Exceeds the annual occupational lens dose limit of 20 mSv

Answer

Is below all occupational limits and requires no action

Answer

Exceeds the annual whole-body limit but not the lens limit

Answer

Triggers mandatory medical removal from work