Question

thermal or chemical decomposition of fuel because of heat that generally results in the lowered ignition temperature of the material is known as:

pyrolysis.

oxidation.

saponification.

flashover

Explanation:

Analyze the definition of thermal decomposition

The question asks for the term that describes the "thermal or chemical decomposition of fuel because of heat that generally results in the lowered ignition temperature of the material."

Evaluate the given options

• pyrolysis: The chemical decomposition of a substance through the action of heat. In fire science, pyrolysis is the process where solid fuel is heated and decomposes into flammable gases.
• oxidation: A chemical reaction in which a substance combines with oxygen.
• saponification: A process that involves the conversion of fat, oil, or lipid into soap and alcohol by the action of heat in the presence of an aqueous alkali (often used in Class K kitchen fire suppression).
• flashover: A transition phase in the development of a compartment fire in which surfaces exposed to thermal radiation reach ignition temperature more or less simultaneously.

Select the correct term

The thermal decomposition of solid fuel to release flammable gases due to heat is defined as pyrolysis.

Answer:

• (A) pyrolysis. (Correct answer)
• (B) oxidation.
• (C) saponification.
• (D) flashover