Fire Safety Fire Extinguisher Types and Usage 4

Question 1

A grease fire ignites in a commercial kitchen. Which extinguisher type is specifically designed for this hazard?

Accepted Answer

Class K

Answer

Class K extinguishers are designed for cooking oils and fats found in commercial kitchens, using wet chemical agents that saponify grease fires.

Question 2

What does the number on a fire extinguisher label (e.g., '2A:10B:C') indicate?

Accepted Answer

The extinguishing capacity and fire class coverage

Answer

The number-letter rating indicates the extinguisher's capacity: the number before 'A' or 'B' reflects the relative firefighting power for that fire class.

Question 3

Which type of fire extinguisher is safe to use on energized electrical equipment?

Accepted Answer

CO2 (carbon dioxide)

Answer

CO2 extinguishers are non-conductive and leave no residue, making them ideal for energized electrical equipment fires.

Question 4

A dry chemical extinguisher has been partially discharged. What is the correct action?

Accepted Answer

Recharge or replace it immediately

Answer

Any extinguisher that has been used, even partially, must be recharged or replaced before being returned to service to ensure it functions fully in an emergency.

Question 5

What is the primary limitation of a water-based extinguisher on a Class B fire?

Accepted Answer

Water can spread flammable liquids and worsen the fire

Answer

Applying water to burning flammable liquids can scatter the burning fuel, spreading the fire rather than extinguishing it.

Fire Safety Practice Test

Fire Safety Practice Test

Fire Safety Fire Extinguisher Types and Usage 4