Which of the following is an example of mechanical harm?

• A. Burns from an explosion
• B. Injuries from falling debris
• C. Exposure to toxic gas
• D. Infection from a biological agent

Answer: (B)

Mechanical harm refers to injuries caused by physical forces or objects, rather than by chemical, biological, or thermal factors. Injuries from falling debris exemplify this type of harm, as they result from a physical impact that can cause bruises, fractures, lacerations, or other forms of trauma to the body. This kind of injury is typically characterized by its reliance on the mechanical action involved, such as weight, height, and velocity of the falling object.

The other options represent different categories of harm: burns from an explosion are thermal injuries, exposure to toxic gas involves chemical harm, and infection from a biological agent results from biological exposure. Each of these examples is fundamentally different from mechanical harm, as they do not rely on physical forces acting directly on the body. Understanding this distinction helps recognize the various types of hazards present in different environments and situations.