Final answer:
Turnout gear is the correct term for the combination of protective clothing typically used by firefighters, including trousers, boots, and jackets. Nomex suits refer to the material used for flame resistance, and SCBA stands for Self-Contained Breathing Apparatus, vital for breathing in smoke-filled areas.
Step-by-step explanation:
The basic trousers, boots, and jacket worn by firefighters, as well as the entire combination of personal protective gear, is known as Turnout gear. This gear includes various items designed to protect firefighters from the heat, flames, and environment they encounter during firefighting activities. The term Nomex suit refers more specifically to the flame-resistant material used in various protective gear, including firefighter uniforms, wildland firefighting attire, and other professions that require heat protection such as racing car drivers and military personnel. A Hazmat suit is designed for protection against hazardous materials and is not specifically for firefighting, whereas an SCBA (Self-Contained Breathing Apparatus) is the respiratory protection used by firefighters in smoke-filled environments.