Ch 20 IFSTA || Questions and 100% Verified Answers.

Which is the most obvious sign of fire cause? Select one: a. Extent of damage b. Occurrence of flashover c. Time between incipient and growth stages d. Competent ignition source correct answers Competent ignition source An occupant stating that the room smelled like propane immediately before the fire started is an example of _____ evidence. Select one: a. circumstantial b. direct c. trace d. physical correct answers direct At a fire scene, firefighters should NOT: Select one: a. keep a written record of on-scene observations. b. share their opinion of the probable fire cause with media or bystanders. c. ask permission from owners before removing evidence from the building. d. enter the scene during a fire investigation without a warrant,. correct answers share their opinion of the probable fire cause with media or bystanders. How large should the perimeter outside a structure fire be? Select one: a. A minimum of 250 feet (75 m) in every direction from the building b. Large enough to surround the building and any adjacent exposure buildings c. Large enough to surround the building and all potential evidence outside the building d. A minimum of 100 feet (30 m) in every direction from the building correct answers Large enough to surround the building and all potential evidence outside the building When trying to locate the area of origin of a ground cover fire, you must know: Select one: a. construction types for buildings in the affected area. b. the precise time the fire started. c. the fire cause before determining the area of origin. d. how wind and topography can affect fire spread. correct answers how wind and topography can affect fire spread. Which characteristic must a material have to be the material first ignited? Select one: a. Exist in a liquid state b. Far enough from windows and doors to not be disturbed by airflow c. Exist in a gaseous state