Associate Certified Entomologist (ACE) Practice Exam

What type of respirator is a TC-21C?

1. Air purifying respirator with chemical cartridges

2. Powered air purifying respirator with particulate filters

3. Dedicated to oil filtration

4. Standard air filtering mask

The correct answer is: Powered air purifying respirator with particulate filters

A TC-21C respirator refers specifically to a type of powered air-purifying respirator (PAPR) that is equipped with particulate filters. These respirators are designed to provide a higher level of protection by blowing filtered air into a headpiece, allowing the wearer to breathe more easily and comfortably, especially during prolonged use. The use of particulate filters in a PAPR means the device is effective in removing airborne particles, including solid and liquid aerosols, which is particularly beneficial in environments where respiratory protection is critical. This type of respirator offers several advantages, such as the ability to filter out finer particles and provide a cooler air supply, making it suitable for tasks requiring extended wear. Given the context of the question related to the specific classification of the TC-21C, it is important to understand how it is utilized in various settings, such as industrial workplaces or healthcare environments, where protection against particulate matter is essential. In contrast, other options like air purifying respirators with chemical cartridges are meant for different hazards, and dedicated oil filtration is specific to filtering oil-based aerosols, which does not align with the design and application of the TC-21C. The designation of "standard air filtering mask" suggests a less advanced filtering capability