What type of respirator is specifically designed to be carried by the user?

The correct choice, the SCBA, or Self-Contained Breathing Apparatus, is specifically designed to be carried by the user for a variety of applications, especially in environments where the air quality is compromised. This type of respirator provides a complete breathing system that includes a tank of compressed air and a mask, allowing the user to breathe safely in hazardous conditions, such as those found in firefighting or certain industrial settings.

SCBAs are typically worn on the back, enabling users to move freely while having immediate access to breathable air. The portability and independent air supply make it ideal for first responders and others who need to operate in unsafe environments.

In contrast, other options such as the PAPR (Powered Air-Purifying Respirator) while also portable, are more complex, with a fan that requires power, and are less commonly carried easily compared to an SCBA. The N95 mask serves to filter airborne particles but is not designed to be carried in the same way nor does it offer the same level of protection against gases and vapors. Lastly, a half mask respirator provides coverage for the mouth and nose but does not include the full face protection or independent air supply that an SCBA offers.

Thus, the SCBA