Which statement correctly matches a level of the hierarchy of controls with a manufacturing example?

• A. PPE - Use job rotation to reduce exposure.
• B. Elimination - Remove the hazard entirely from the process.
• C. Engineering controls - Implement machine guarding to prevent access to moving parts.
• D. Administrative controls - Install guard rails on equipment.

Answer: (C)

The idea being tested is how the different levels of the hierarchy of controls apply in a real-world setting. Engineering controls are built into the process or equipment to remove or reduce exposure without relying on workers’ behavior. In manufacturing, protecting workers from moving parts by adding machine guarding directly prevents the hazard at its source, which is exactly what an engineering control is designed to do. That’s why describing engineering controls as implementing machine guarding to prevent access to moving parts is the best match.

The other statements mix up the control types. Job rotation is an administrative control, not PPE, and its purpose is to reduce exposure through scheduling and work organization rather than shielding or removing the hazard. The guard rails example describes a protective feature, but labeling it as an administrative control makes it incorrect. Elimination is a correct concept in the hierarchy (removing the hazard entirely), but the statement doesn’t illustrate a specific engineering-control approach in the manufacturing context as clearly as machine guarding does.