Which of the following is a characteristic of Engineering Controls?

The selected answer is correct because engineering controls are designed to eliminate or reduce exposure to hazards by modifying the physical environment or work processes. These controls are implemented to prevent risks before they can cause harm, focusing on changing equipment, processes, or systems to enhance safety. For example, enclosing a machine or using ventilation to remove harmful airborne substances are effective engineering controls.

The other options do not accurately describe engineering controls. Employee training relates more to administrative controls, which are aimed at educating and informing employees about safety practices rather than altering the physical setup. The option about requiring no physical barriers contradicts the nature of engineering controls, as they often involve the installation of barriers or changes in design to mitigate hazards. Lastly, the claim that they are the least cost-effective method is not true, as engineering controls, while often requiring initial investment, can lead to long-term savings by reducing accidents and related costs.