NRRPT Decontamination & Exposure Prevention 2

Question 1

Which of the following best describes 'fixed' contamination?

Accepted Answer

Contamination that is bonded to a surface and cannot be removed by wiping

Answer

Fixed contamination is radioactive material that is bonded to a surface and cannot be removed by wiping or normal cleaning methods.

Question 2

A worker exits a radiological area and a frisker indicates contamination on their right hand. What is the FIRST action to take?

Accepted Answer

Prevent the worker from leaving the buffer zone and begin decontamination

Answer

The worker should be prevented from spreading contamination beyond the buffer zone and decontamination should begin immediately.

Question 3

What is the primary purpose of a 'step-off pad' at a radiological boundary?

Accepted Answer

To provide a clean surface for removing protective footwear and preventing contamination spread

Answer

Step-off pads provide a clean zone where workers can remove contaminated shoe covers without tracking contamination into clean areas.

Question 4

Which decontamination technique is preferred for skin contamination to avoid damaging the skin's protective barrier?

Accepted Answer

Mild soap and lukewarm water with gentle washing

Answer

Mild soap and lukewarm water with gentle washing is preferred because aggressive scrubbing can break the skin barrier and increase absorption.

Question 5

When performing a smear (swipe) survey to assess removable contamination, what area is typically wiped per smear?

Accepted Answer

100 square centimeters

Answer

The standard smear survey covers 100 cm² (approximately a 10 cm × 10 cm area) to provide a consistent and reproducible contamination sample.

(NRRPT) National Registry of Radiation Protection Technicians Practice Test