A slash on a class icon indicates the extinguisher is not recommended for use on that class because:

A slash on a class icon indicates the extinguisher is not recommended for use on that class because:

• A. It would be ineffective
• B. It would create additional risks
• C. It has not been tested for that class
• D. Its use is illegal for that class

Answer: (B)

A slash through a class icon signals that the extinguisher is not suitable for that class because using it would create additional risks, not just be less effective. Each class requires a specific extinguishing method, and applying the wrong type can cause the fire to spread, react with fuels, or introduce electrical or chemical hazards. The idea is to choose an extinguisher that matches the class to safely control the fire without introducing new dangers.

A slash through a class icon signals that the extinguisher is not suitable for that class because using it would create additional risks, not just be less effective. Each class requires a specific extinguishing method, and applying the wrong type can cause the fire to spread, react with fuels, or introduce electrical or chemical hazards. The idea is to choose an extinguisher that matches the class to safely control the fire without introducing new dangers.