What must employees watch for when extending any part of their body beyond the side of an engine or car?

When extending any part of the body beyond the side of an engine or car, employees must primarily watch for close clearances. This refers to the need to be aware of the physical space around them, as being too close to moving parts or structure can result in injury. Close clearances can present hazards from rotating components, nearby objects, or even the size and dimensions of the equipment itself.

By being vigilant about close clearances, employees can avoid accidents that may occur if body parts accidentally get caught or struck by moving machinery or other objects in the work environment. This awareness is crucial for maintaining personal safety in areas where machinery is operated, particularly in tight spaces or when vehicles are in motion.