Which statement about the Hierarchy of Controls is correct?

Which statement about the Hierarchy of Controls is correct?

• A. PPE is the most effective control
• B. Substitution is a form of Engineering Control
• C. Energy isolating devices are PPE
• D. Administrative controls are always preferred over Engineering controls

Answer: (B)

The main idea here is reducing the hazard at the source. Substitution achieves that by replacing a hazardous material or process with something less dangerous. That means the risk is lowered before workers are exposed, which is exactly how risk reduction is strongest: by changing the thing that creates the hazard in the first place. This approach aligns with engineering-style thinking—making a change in the design or materials to prevent harm rather than relying on workers to wear protection or follow strict procedures after exposure could occur. PPE is less effective because it depends on individuals using protective gear correctly every time. Energy-isolating devices are classic engineering controls, not PPE, so saying they’re PPE isn’t accurate. Administrative controls change how work is done but don’t reduce the hazard itself as directly or reliably as substitutions or other engineering changes. In short, substitution stands out as a significant hazard-reducing step that fits into the higher levels of the protection hierarchy.

The main idea here is reducing the hazard at the source. Substitution achieves that by replacing a hazardous material or process with something less dangerous. That means the risk is lowered before workers are exposed, which is exactly how risk reduction is strongest: by changing the thing that creates the hazard in the first place. This approach aligns with engineering-style thinking—making a change in the design or materials to prevent harm rather than relying on workers to wear protection or follow strict procedures after exposure could occur.

PPE is less effective because it depends on individuals using protective gear correctly every time. Energy-isolating devices are classic engineering controls, not PPE, so saying they’re PPE isn’t accurate. Administrative controls change how work is done but don’t reduce the hazard itself as directly or reliably as substitutions or other engineering changes. In short, substitution stands out as a significant hazard-reducing step that fits into the higher levels of the protection hierarchy.