Which of the following is a true statement regarding the use of hydrocarbon gas hair curlers on a flight?

The correct assertion is that hydrocarbon gas hair curlers may not be used in flight due to safety concerns. These devices are essentially tools that contain flammable gases, which pose a significant risk in the aircraft environment. The confined space, combined with the potential presence of heat sources or sparks, creates a hazardous situation.

In-flight safety regulations prioritize minimizing the risk of fire or explosions, which could arise from the use of flammable substances. Therefore, forbidding such devices from being used during a flight effectively mitigates the risk to passengers and crew, ensuring a safer travel experience.

While some personal care items may be permitted under specific guidelines, the flammable aspect of hydrocarbon gas curlers categorically places them in a restricted category for in-flight use.