NMTCB Radiation Safety & Regulations 2

Question 1

What is the annual occupational effective dose limit for radiation workers in the US?

Accepted Answer

5 rem (50 mSv)

Answer

The NRC sets the annual occupational effective dose limit at 5 rem (50 mSv) per year for radiation workers.

Question 2

Which principle of radiation protection involves maximizing distance from the source?

Accepted Answer

Distance

Answer

Distance is one of the three cardinal principles of radiation protection; doubling distance reduces exposure by a factor of four (inverse square law).

Question 3

A radiation survey meter reads 5 mR/hr at 1 meter from a source. What is the approximate dose rate at 2 meters?

Accepted Answer

1.25 mR/hr

Answer

By the inverse square law, doubling the distance reduces dose rate by a factor of 4, so 5 ÷ 4 = 1.25 mR/hr.

Question 4

Which document establishes radiation protection standards for NRC-licensed facilities?

Accepted Answer

10 CFR Part 20

Answer

10 CFR Part 20 (Standards for Protection Against Radiation) is the NRC regulation governing occupational and public radiation exposure.

Question 5

What type of dosimeter provides a continuous, real-time readout of accumulated radiation dose?

Accepted Answer

Electronic personal dosimeter (EPD)

Answer

Electronic personal dosimeters (EPDs) provide real-time digital readout of accumulated dose and dose rate, unlike passive dosimeters.

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

NMTCB Radiation Safety & Regulations 2