🔍 Key Concepts
• Fire classification system (Classes A, B, C, D, and K) and what type of fuel each class represents
• Difference between ordinary combustibles, flammable liquids, and energized electrical equipment
• How engine room spaces commonly contain more than one fire class at the same time
đź’ Think About
• For each answer choice, identify what is actually burning: is it a solid material, a liquid, or electrical equipment?
• Ask yourself: If the power were shut off, would this still be the same class of fire, or would it change?
• Think about which fire class specifically covers flammable and combustible liquids such as fuel oil in machinery spaces
âś… Before You Answer
• Remember that Class B is associated with a specific state of matter and type of fuel, not where the fire is located
• Verify which option involves flammable liquid as the primary fuel rather than rags or insulation
• Confirm that a fire involving electrical equipment may shift class once it is de‑energized, so focus on the fuel source, not just the presence of electricity