Knowledge: List three types of fire extinguisher commonly used in workplaces and describe the classes of fires they are designed to extinguish?

1. Water fire extinguisher: Water fire extinguishers are designed to extinguish Class A fires, which involve ordinary combustible materials such as wood, paper, and cloth. They are not suitable for use on Class B (flammable liquids) or Class C (electrical) fires.

2. CO2 fire extinguisher: CO2 fire extinguishers are designed to extinguish Class B and Class C fires. They work by displacing oxygen and removing heat from the fire, making them effective for extinguishing fires involving flammable liquids and electrical equipment.

3. Dry chemical fire extinguisher: Dry chemical fire extinguishers are versatile and can be used on Class A, B, and C fires. They contain a dry chemical powder that smothers the fire and interrupts the chemical reaction of the fire triangle. Dry chemical fire extinguishers are commonly found in workplaces as they can be used on a variety of fire types.

1. Water Extinguishers - Class A (ordinary combustibles, such as paper, wood, cloth)

2. Dry Chemical Extinguishers - Class B (flammable liquids, such as gasoline, oil, paints), Class C (electrical fires)

3. Carbon Dioxide Extinguishers - Class B (flammable liquids), Class C (electrical fires)

3 type