What is an effective method for controlling flammable liquid spills?

Using absorbent materials or diking to contain the spill is a highly effective method for controlling flammable liquid spills. This approach works by preventing the spread of the liquid and minimizing the risk of ignition. Absorbent materials can soak up the liquid, reducing the overall volume and risk of exposure to fire hazards. Diking involves creating barriers around the spill area, which helps confine the liquid and allows for safer cleanup operations. This method prioritizes safety and containment, making it essential when dealing with flammable substances.

The other options present methods that are less effective or potentially dangerous. For instance, using water to dilute a flammable liquid can increase the risk of spreading the fire, as many flammable liquids are lighter than water and can float, leading to further hazards. Vacuuming might seem like a prompt solution, but it requires specialized equipment and can be impractical in uncontrolled environments. Lastly, attempting to burn off the flammable liquid poses significant safety risks and is not a standard or safe protocol for dealing with these types of spills. Therefore, using absorbent materials or diking is the most appropriate and safe method for managing flammable liquid spills.