What health risks are associated with operating CNC machines?

Operating CNC machines can pose several health risks, with noise exposure and potential injuries from moving parts being significant concerns. CNC machines often operate at high speeds and can create substantial noise levels, which can lead to hearing damage over prolonged exposure. It's essential for operators to use personal protective equipment, such as earplugs or earmuffs, to mitigate this risk.

Additionally, the nature of CNC machining involves moving parts, which can pose a risk for physical injuries if proper safety protocols are not followed. Operators need to be aware of their surroundings and the machinery's operation to avoid accidents like being caught in moving components or sustaining cuts from sharp tools.

While the other choices might suggest health risks related to CNC machine operation, they are not as prevalent in the context of standard CNC operations. For instance, exposure to harmful chemicals might be relevant in specific machining processes that use coolant liquids, but it’s not a general risk associated with CNC operation like noise exposure and mechanical hazards. Similarly, while electric shock is a risk related to operating any electrical machinery, the focus of health risks in the context of CNC machines predominantly circles back to noise and mechanical injuries.