Associate Certified Entomologist (ACE) Practice Exam

What type of respirator is a TC-23C?

1. Air purifying respirator with a single type of cartridge

2. Powered air-purifying respirator with chemical cartridges

3. Combination of air purifying and powered respiratory filters

4. Only used in environments with no oil present

The correct answer is: Powered air-purifying respirator with chemical cartridges

A TC-23C respirator is classified as a powered air-purifying respirator (PAPR). These respirators utilize a battery-powered blower to pull air through filters or chemical cartridges before delivering it to the user. This design is advantageous as it provides a higher flow rate of filtered air, making them more effective for extended use in environments where respiratory protection is required. PA-PRs, such as the TC-23C, are particularly useful in situations where particulates and chemical hazards are present since they can effectively remove contaminants from the air. Additionally, they are designed to provide a tighter and more comfortable fit, reducing fatigue compared to negative-pressure respirators. The other options characterize respirators that do not match the specifics of the TC-23C. For example, a simple air-purifying respirator typically relies on a passive system where the wearer inhales air that has passed through filters without powered assistance. Similarly, the designation of only being usable in environments without oil present pertains to different respirators that are designed for specific applications. The TC-23C can handle a wide range of conditions and contaminants, reinforcing its role as a versatile choice in many hazardous environments.