Fire Safety Fire Behavior and Combustion Science

Question 1

What three elements make up the fire triangle?

Accepted Answer

Fuel, oxygen, and heat

Answer

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

Question 2

Which class of fire involves ordinary combustibles such as wood, paper, and cloth?

Accepted Answer

Class A

Answer

Class A fires involve ordinary solid combustibles like wood, paper, cloth, and most plastics, and are the most common type found in homes and offices.

Question 3

What is the autoignition temperature of a material?

Accepted Answer

The minimum temperature at which it will ignite without any external ignition source

Answer

Autoignition temperature is the minimum temperature at which a material spontaneously ignites without any external spark or flame present.

Question 4

What is flashover in the context of fire development?

Accepted Answer

The sudden, simultaneous ignition of all combustible materials in a room

Answer

Flashover occurs when all combustibles in a room reach their ignition temperature simultaneously, resulting in near-instantaneous full-room fire involvement.

Question 5

Which combustion gas is responsible for the majority of fire-related fatalities in the United States?

Accepted Answer

Carbon monoxide (CO)

Answer

Carbon monoxide is the leading cause of fire deaths because it is colorless, odorless, and rapidly incapacitates victims before they can escape.

Fire Safety Practice Test

Fire Safety Practice Test

Fire Safety Fire Behavior and Combustion Science