What caution should be taken regarding the brake drum during an inspection?

During an inspection, caution regarding the brake drum is vital because it can become extremely hot during operation. This heat is a result of the friction generated when the brakes are applied. Touching a hot brake drum can lead to severe burns, making it essential for inspectors to avoid direct contact after the vehicle has been in use.

While the other aspects of brake drum maintenance, such as ensuring a smooth surface or cleaning, are important for the overall functionality and safety of the braking system, the immediate risk associated with temperature makes the caution around touching it after heavy use particularly significant. Regular lubrication is more relevant to other parts of the braking system rather than the brake drum itself. Hence, attention to the potential heat hazard is paramount during inspections.