CFM Fire Behavior & Combustion Principles

Question 1

What are the three components of the fire triangle?

Accepted Answer

Heat, fuel, and oxygen

Answer

The fire triangle consists of heat, fuel, and oxygen — all three must be present simultaneously for fire to occur and be sustained.

Question 2

The lowest temperature at which a liquid produces enough vapor to ignite momentarily when exposed to an open flame is called:

Accepted Answer

Flash point

Answer

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.

Question 3

Which type of heat transfer occurs when heat moves through direct physical contact between materials?

Accepted Answer

Conduction

Answer

Conduction transfers heat through direct physical contact between materials, such as a hot metal beam heating adjacent structural members.

Question 4

The phenomenon where all combustible materials in a confined space simultaneously ignite due to accumulated radiant heat is called:

Accepted Answer

Flashover

Answer

Flashover occurs when radiant heat causes all combustible materials in a compartment to simultaneously ignite, rapidly transitioning the fire to full room involvement.

Question 5

Which class of fire involves combustible metals such as magnesium, sodium, and titanium?

Accepted Answer

Class D

Answer

Class D fires involve combustible metals such as magnesium, sodium, potassium, and titanium, which require specialized dry powder extinguishing agents.

CFM - Certified Fire Marshal Practice Test

CFM - Certified Fire Marshal Practice Test

CFM Fire Behavior & Combustion Principles