Firefighter Fire Behavior and Suppression 2

Question 1

What term describes the rapid spread of fire across the unburned gases collected at the ceiling of a compartment?

Accepted Answer

Rollover

Answer

Rollover (flameover) is the ignition and rapid spread of flame through the unburned gases accumulated at the ceiling.

Question 2

Which class of fire involves energized electrical equipment?

Accepted Answer

Class C

Answer

Class C fires involve energized electrical equipment and require a non-conductive extinguishing agent.

Question 3

What is the primary extinguishing mechanism of water on a Class A fire?

Accepted Answer

Cooling and heat absorption

Answer

Water primarily extinguishes Class A fires by absorbing heat and cooling the fuel below its ignition temperature.

Question 4

A firefighter notices smoke puffing in and out of a closed door with no visible flame. This sign most likely indicates risk of:

Accepted Answer

Backdraft

Answer

Pulsing or breathing smoke around openings signals an oxygen-starved compartment at risk of backdraft.

Question 5

Which method of heat transfer moves heat through direct physical contact between materials?

Accepted Answer

Conduction

Answer

Conduction transfers heat through direct contact between materials, such as along a metal beam.

Firefighter Practice Test