Fire Behavior & Combustion Principles Flashcards
7 cards from real CFM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fire Behavior & Combustion Principles flashcards as text
What are the three components of the fire triangle?
Answer: Heat, fuel, and oxygen
The fire triangle consists of heat, fuel, and oxygen — all three must be present simultaneously for fire to occur and be sustained.
The lowest temperature at which a liquid produces enough vapor to ignite momentarily when exposed to an open flame is called:
Answer: Flash point
The flash point is the lowest temperature at which a liquid produces sufficient vapor to ignite momentarily when exposed to an external ignition source such as an open flame.
Which type of heat transfer occurs when heat moves through direct physical contact between materials?
Answer: Conduction
Conduction transfers heat through direct physical contact between materials, such as a hot metal beam heating adjacent structural members.
The phenomenon where all combustible materials in a confined space simultaneously ignite due to accumulated radiant heat is called:
Answer: Flashover
Flashover occurs when radiant heat causes all combustible materials in a compartment to simultaneously ignite, rapidly transitioning the fire to full room involvement.
Which class of fire involves combustible metals such as magnesium, sodium, and titanium?
Answer: Class D
Class D fires involve combustible metals such as magnesium, sodium, potassium, and titanium, which require specialized dry powder extinguishing agents.
What term describes the transfer of heat through electromagnetic waves without requiring a physical medium or direct contact?
Answer: Radiation
Radiation transfers heat through electromagnetic waves and does not require direct contact or a medium, allowing heat energy to travel through open space.
Which statement correctly describes the minimum concentration of flammable vapor in air required to sustain combustion?
Answer: It is called the lower explosive limit (LEL)
The lower explosive limit (LEL) is the minimum concentration of flammable vapor in air below which the mixture is too lean to sustain combustion.