F80 Fire Behavior and Combustion Principles

Question 1

What are the three elements of the fire triangle?

Accepted Answer

Fuel, oxygen, and heat

Answer

The fire triangle consists of fuel, oxygen, and heat — removing any one element will extinguish the fire.

Question 2

What is flashover in fire behavior?

Accepted Answer

The rapid transition to full room involvement when all combustible surfaces ignite simultaneously

Answer

Flashover is the rapid transition where radiant heat causes all combustible surfaces in a compartment to ignite simultaneously.

Question 3

Which class of fire involves flammable and combustible liquids?

Accepted Answer

Class B

Answer

Class B fires involve flammable and combustible liquids such as gasoline, oil, and grease.

Question 4

What is the primary product of complete combustion of hydrocarbons?

Accepted Answer

Carbon dioxide and water vapor

Answer

Complete combustion of hydrocarbons produces carbon dioxide (CO2) and water vapor as the fully oxidized end products.

Question 5

Which gas is most responsible for fire-related fatalities?

Accepted Answer

Carbon monoxide

Answer

Carbon monoxide is the leading cause of fire deaths because it is colorless, odorless, and binds to hemoglobin far more readily than oxygen.

F80 Practice Test Practice Test