Which term is commonly used interchangeably with flammability range?

The term "flammability range" refers to the set of conditions under which a substance can ignite and sustain combustion when mixed with air. The flammability or explosive limit specifically denotes the concentration levels of a combustible gas or vapor in air that can ignite and produce an explosion.

The correct answer, "explosive limit," denotes the upper and lower limits of flammability. When a substance is within this range, it can ignite in the presence of an ignition source, leading potentially to an explosion or fire. This term effectively covers the same concept as flammability range and is commonly used in fire safety and hazard assessments.

Understanding this connection helps in risk assessment and safety protocols in environments where flammable materials are present. This makes it crucial for first responders and firefighters to comprehend these limits in order to effectively mitigate fire hazards and ensure safety.