What is the difference between removable and fixed contamination?

What is the difference between removable and fixed contamination?

• A. Removable contamination can be easily transferred by touch or handling; fixed contamination remains bound to a surface and is not easily removable.
• B. Removable contamination is more dangerous than fixed.
• C. Fixed contamination can be wiped off easily; removable cannot be removed.
• D. Removable contamination is only on air, not surfaces.

Answer: (A)

This question focuses on how contamination behaves on surfaces and with people. The key idea is the ease with which contamination can move or be removed. Removable contamination is not tightly bound to a surface, so it can be picked up through touch, handling, or contact with contaminated objects and can spread to skin, clothing, tools, or other surfaces. Fixed contamination, on the other hand, is bound to the surface and resists removal through ordinary cleaning, staying in place until a proper decontamination process is applied. This distinction matters for safety because removable contamination poses a greater potential for transfer and spread during normal activities, while fixed contamination requires careful decontamination of the surface to prevent future transfer. Other statements miss the core difference. For example, danger level isn’t the defining factor of the distinction, fixed contamination isn’t easily wiped away, and removable contamination isn’t limited to air—it's also on surfaces and can be transferred through contact.

This question focuses on how contamination behaves on surfaces and with people. The key idea is the ease with which contamination can move or be removed.

Removable contamination is not tightly bound to a surface, so it can be picked up through touch, handling, or contact with contaminated objects and can spread to skin, clothing, tools, or other surfaces. Fixed contamination, on the other hand, is bound to the surface and resists removal through ordinary cleaning, staying in place until a proper decontamination process is applied. This distinction matters for safety because removable contamination poses a greater potential for transfer and spread during normal activities, while fixed contamination requires careful decontamination of the surface to prevent future transfer.

Other statements miss the core difference. For example, danger level isn’t the defining factor of the distinction, fixed contamination isn’t easily wiped away, and removable contamination isn’t limited to air—it's also on surfaces and can be transferred through contact.