What is the condensed residue of suspended vapors and liquid products of incomplete combustion called?

The correct term for the condensed residue of suspended vapors and liquid products from incomplete combustion is "Smoke Condensate." This term specifically refers to the byproducts that form when smoke cools and condenses, leading to the formation of liquid droplets that are often a mixture of water, organic compounds, and other chemical substances.

Smoke condensate can contain a variety of toxic and hazardous materials, making it important in fire investigations for understanding combustion processes and potential health risks. It is different from smoke in that "smoke" refers to the visible particulate matter formed during combustion, while "smoke condensate" indicates the condensed form that can settle on surfaces after the smoke has cooled, providing insights into the conditions of a fire and the materials involved.

Identifying smoke condensate is vital for forensic analysis, as it can provide valuable information about the burning materials and the fire's behavior, which plays a critical role in fire investigations as outlined in NFPA 921. Understanding these residues aids investigators in determining the causes and specifics of a fire event, which is essential in both legal and safety contexts.