Certified Fire Protection Specialist (CFPS) — Question 49

To which of the following fires would infrared flame detectors be non-responsive?

Answer options

• A. Ethylene and propylene oxide fires
• B. Gasoline and diesel fuel fires
• C. Jet fuel and butane fires
• D. Sulfur and hydrogen fires

Correct answer: D

Explanation

Infrared flame detectors are typically non-responsive to certain types of fires that produce low levels of infrared radiation. Sulfur and hydrogen fires (option D) emit radiation that falls outside the detection range of these devices, while the other types of fires listed produce adequate infrared signatures for detection.