Smoldering burning is the final phase of a fire where visible flames are no longer present, but extreme heat persists. This occurs when the available fuel is nearly consumed, or oxygen is limited, creating a high-temperature environment without active flames. It poses a serious re-ignition risk.
Ignition stage (B) is the beginning of the fire.
Last stage (C) is too vague.
Incipient stage (D) refers to the early development before flames appear.
[References:, , ASIS POA Manual – Fire Behavior and Stages, , PSP Study Guide – Fire Development and SuppressionQUESTION NO: 75, , The temperature at which a solid fuel will inflame without direct flame contact is known as:, , A. Excess temperature, B. Ignition temperature, C. Agitate temperature, D. None of the above, , Answer: B , Ignition temperature (also known as autoignition temperature) is the minimum temperature at which a material will ignite spontaneously without an external flame or spark. Each material has a unique ignition temperature, which is a critical factor in fire safety and prevention., , Excess temperature (A) and Agitate temperature (C) are not standard fire science terms., , “None of the above” (D) is incorrect since ignition temperature is the valid term., , References:, , PSP Study Guide – Fire Risk and Safety, , ASIS POA Manual – Combustion Principles]
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