NRRPT Radiological Control & Safety Procedures 3

Question 1

What is the correct sequence for donning personal protective equipment (PPE) when entering a contaminated area?

Accepted Answer

Respirator → coveralls → inner gloves → booties → outer gloves

Answer

Respirator is donned first to protect airways before other PPE is put on, followed by coveralls, gloves, and booties to minimize contamination risk during donning.

Question 2

A high radiation area (HRA) is defined under 10 CFR 20 as an area where radiation levels could result in a dose equivalent exceeding what value in one hour at 30 cm from the source?

Accepted Answer

100 mrem (1 mSv)

Answer

Per 10 CFR 20.1003, a high radiation area means radiation levels that could result in an individual receiving a dose equivalent in excess of 100 mrem in one hour at 30 cm.

Question 3

When performing a frisking (contamination survey) of a worker exiting a radiological area, which body region should be surveyed last?

Accepted Answer

Hands and wrists

Answer

Hands and wrists are surveyed last because they often have the highest contamination potential and are used throughout the frisking process.

Question 4

What does the term 'stay time' refer to in radiological control planning?

Accepted Answer

The calculated time a worker can remain in a radiation field without exceeding a specified dose

Answer

Stay time is the maximum duration a worker may remain in a radiation field to keep the received dose within planned limits.

Question 5

Which type of radiation is most effectively shielded by a thin sheet of paper or the dead layer of skin?

Accepted Answer

Alpha

Answer

Alpha particles have very low penetrating power and are stopped by a sheet of paper or the outer dead layer of skin, posing hazard mainly through internal exposure.

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

NRRPT Radiological Control & Safety Procedures 3