Building Construction & Fire Behavior Flashcards
7 cards from real CFI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Building Construction & Fire Behavior flashcards as text
Which building construction type uses exterior walls of noncombustible or limited-combustible materials with a combustible interior?
Answer: Type III (Ordinary)
Type III (Ordinary) construction uses noncombustible exterior walls but allows combustible interior framing and components.
What phenomenon occurs when superheated gases at ceiling level suddenly ignite, causing simultaneous ignition of all combustible surfaces in a room?
Answer: Flashover
Flashover is the near-simultaneous ignition of all exposed combustible material in an enclosure, typically occurring when upper layer temperatures reach 500–600°C.
A fire inspector notes that a renovated building has steel columns unprotected by fireproofing. Which hazard does this create?
Answer: Potential structural collapse due to steel losing strength at elevated temperatures
Unprotected steel loses approximately 50% of its yield strength at around 1,100°F (593°C), leading to possible structural collapse.
In the context of fire behavior, what does 'fuel-controlled fire' mean?
Answer: Combustion rate is limited by available fuel rather than oxygen
A fuel-controlled fire has adequate oxygen but limited fuel, so the combustion rate is governed by the amount and arrangement of combustible materials.
Which feature of Type IV (Heavy Timber) construction helps it perform well in fire?
Answer: Large wood members char on the outside, slowing combustion
Heavy timber members develop a self-insulating char layer that slows the rate of combustion and helps maintain structural integrity longer than lighter wood members.
What is the primary reason balloon-frame construction is considered especially dangerous during a fire?
Answer: Wall cavities run continuously from foundation to roof, allowing rapid vertical fire spread
Balloon-frame construction has continuous wall stud cavities from the sill plate to the roof that act as chimneys, rapidly spreading fire and gases to upper floors and attic spaces.
During fire investigation, an inspector finds intense burning at floor level with little ceiling damage. This pattern most likely indicates:
Answer: Low-burning fuel such as flammable liquid pooled on the floor
Flammable liquid fires burn close to the floor surface, producing characteristic low-burn patterns and pour patterns that differ from typical upward-spreading fires.