CAMRT Radiation Protection and Safety Questions and Answers 2

Question 1

According to CNSC regulations, what is the annual effective dose limit for radiation workers?

Accepted Answer

50 mSv

Answer

10 mSv

Answer

20 mSv

Answer

100 mSv

Question 2

What is the inverse square law in radiation protection?

Accepted Answer

Intensity decreases with the square of distance; doubling distance reduces exposure to one-quarter

Answer

Intensity doubles when distance halves

Answer

Intensity decreases linearly with distance

Answer

Only applies to radioactive sources

Question 3

A dosimeter was left on a sunlit windowsill over the weekend. What should the technologist do?

Accepted Answer

Report to the RSO, request replacement, note the incident for dose records

Answer

Continue using it

Answer

Discard without reporting

Answer

Reset to zero

Question 4

What shielding material is most common for diagnostic X-ray protection?

Accepted Answer

Lead, due to its high atomic number and density

Answer

Concrete

Answer

Steel

Answer

Copper

Question 5

What is the purpose of the 10-day and 28-day rules for female patients?

Accepted Answer

Guide timing of non-urgent pelvic imaging to minimize irradiating an early pregnancy

Answer

Specify maximum pregnancy dose

Answer

Specify waiting periods before conception

Answer

Define waiting periods between exams

Question 6

Which biological effects of radiation are most relevant in diagnostic imaging?

Accepted Answer

Stochastic effects (cancer and hereditary) are primary, as diagnostic doses are below deterministic thresholds

Answer

Only deterministic effects

Answer

Neither type at diagnostic levels

Answer

Only acute radiation syndrome