Ontario Security Guard License Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The Workplace Hazardous Materials Information System (WHMIS) is a comprehensive system for providing health and safety information about hazardous products involved in workplaces. WHMIS categorizes these hazardous materials into different classes based on the type of hazard they present.

Class "B" in WHMIS stands for "Flammable and Combustible Material". These are materials that could ignite or explode if exposed to a heat source, flame, or even a spark. They are categorized into three different divisions: flammable gases, flammable liquids and combustibles. These materials are easily ignited and pose a serious risk in the workplace if not properly handled or stored.

Therefore, "flammable and combustible liquids" defines the WHMIS Class "B". Examples of materials that fall under this class include gasoline, propane and alcohol. It's critical for security professionals to understand these classifications to ensure a safe work environment, and to adopt appropriate measures when dealing with these substances.