A detector designed to be sensitive to only gases produced by specific hostile fires is called a what?

• A. Water Vapor Detector
• B. Carbon Monoxide Detector
• C. Fire-Gas Detector
• D. Smoke Detector

Answer: (C)

The main idea is detectors that focus on the gases produced by burning, rather than particles or humidity. A fire-gas detector is built to sense combustion gases that are released during hostile or unusual fires, providing early warning even when smoke isn’t visible. It often targets gases like carbon monoxide or other toxic combustion products, giving a quicker alert in environments where a flame is present but smoke may be limited or delayed.

Water vapor detectors only respond to humidity, which isn’t a reliable fire indicator. A carbon monoxide detector sticks to CO alone, which can be produced in many fires and isn’t specifically about detecting gases unique to hostile fires. A smoke detector looks for particles in the air from burning material, not the gases themselves. Therefore, a fire-gas detector best fits the description of being sensitive to gases produced by specific hostile fires.