Which method is used to identify the source of a fire?

Which method is used to identify the source of a fire?

• A. Feel for hotspots using the back of your hand
• B. Listen for crackling noises from the fire
• C. Look for flames at ceiling level only
• D. Smell for burning plastic

Answer: (A)

Identifying the fire’s origin comes down to detecting heat around likely areas and using that heat pattern to pinpoint where it started. Feeling for hotspots with the back of the hand is used because it lets you sense elevated temperatures without risking burns on your fingertips and while keeping your hands at a safer distance from potential flames. By passing the back of your hand along surfaces such as panels, wiring, galleys, and seats, you can feel where heat concentrates, which typically marks the source or its immediate vicinity. Relying on sounds isn’t precise—crackling can come from materials away from the origin or from other noises in the cabin. Looking for flames at the ceiling only is misleading since the fire may originate below or in hidden areas and flames can spread quickly. Smelling burning plastic can indicate something is burning but doesn’t tell you where it started. The heat-detection approach directly guides you to the source, enabling a faster and safer assessment.

Identifying the fire’s origin comes down to detecting heat around likely areas and using that heat pattern to pinpoint where it started. Feeling for hotspots with the back of the hand is used because it lets you sense elevated temperatures without risking burns on your fingertips and while keeping your hands at a safer distance from potential flames. By passing the back of your hand along surfaces such as panels, wiring, galleys, and seats, you can feel where heat concentrates, which typically marks the source or its immediate vicinity.

Relying on sounds isn’t precise—crackling can come from materials away from the origin or from other noises in the cabin. Looking for flames at the ceiling only is misleading since the fire may originate below or in hidden areas and flames can spread quickly. Smelling burning plastic can indicate something is burning but doesn’t tell you where it started. The heat-detection approach directly guides you to the source, enabling a faster and safer assessment.