Basic Operations Firefighter Certification Practice Exam

What are the two general types of self-contained breathing apparatus (SCBA)?

1. Lightweight and Heavy Duty

2. Open and Closed Circuit

3. Automated and Manual

4. Standard and Specialized

The correct answer is: Open and Closed Circuit

The correct answer identifies the two general types of self-contained breathing apparatus (SCBA) as open circuit and closed circuit. Open circuit SCBA is the most common type used in firefighting and rescue operations. In this system, air is supplied from a tank that a firefighter wears on their back, and exhaled air is released into the environment. This type allows for easier usage and maintenance, making it ideal for various operational scenarios. Closed circuit SCBA, on the other hand, is designed to recycle exhaled air. The exhaled air is processed to remove carbon dioxide and add oxygen, allowing the user to breathe the same air multiple times. This type is typically used in situations where external air quality may be compromised or limited, such as in confined spaces or extended duration missions. Understanding the differences between these two types is critical for firefighters as it influences their approach to safety, duration of use, and operational effectiveness in various environments. The other options do not accurately capture the primary classifications of SCBA systems, which center on their function and design concerning air supply and management.