Radiation Safety Practice Exam

What is the preferred method for decontaminating larger areas?

1. Cleaning with mild soap and lukewarm water

2. Wiping with dry cloths only

3. Using high-pressure water jets

4. Scrubbing with abrasive brushes

The correct answer is: Cleaning with mild soap and lukewarm water

The preferred method for decontaminating larger areas involves cleaning with mild soap and lukewarm water. This approach is effective because mild soap helps to break down and lift contaminants from surfaces, while lukewarm water enhances the cleaning action by aiding in the dissolution of debris and radiation particles. This method is gentle enough to avoid damaging surfaces but effective enough to remove contaminants thoroughly. Using high-pressure water jets can dislodge contaminants, but it may also spread contaminants to surrounding areas or create aerosols, which can pose additional risks. Wiping with dry cloths only does not adequately remove contaminants, as it might merely push particles around rather than capturing them. Finally, scrubbing with abrasive brushes can damage surfaces and may not be effective in removing all types of contaminants. Thus, the use of mild soap and lukewarm water strikes the right balance of safety and effectiveness for decontamination in larger areas.