Final answer:
A Class B fire extinguisher is designed to put out fires involving flammable liquids such as gasoline, oil, and grease. These extinguishers use foam or dry chemical powder to smother the fire.
Step-by-step explanation:
A Class B fire extinguisher is designed to put out fires involving flammable liquids such as gasoline, oil, and grease. These extinguishers use a special type of foam or dry chemical powder to smother the fire and prevent the spread of flames.
For example, a fluorinated solution is used in Class B fire extinguishers to spread across the burning surface and extinguish the fire.