Name three types of controls used to reduce explosive risk during egress.

• A. PPE
• B. Engineering controls
• C. Administrative controls
• D. All of the above

Answer: (D)

A layered safety approach uses three broad types of controls to reduce explosive risk during egress: PPE, engineering controls, and administrative controls. PPE protects workers at the point of exposure by providing appropriate protective gear such as flame-resistant clothing, eye protection, and gloves. Engineering controls modify the environment to lessen risk or mitigate blast effects, including blast-resistant barriers, clearly defined and secure egress routes, physical separation, and effective ventilation. Administrative controls establish procedures and training that guide safe behavior, like permit-to-work systems, clear evacuation routes, alarms, drills, and incident reporting. Because each type addresses different aspects—personal protection, environmental risk reduction, and procedural safeguards—relying on all three creates multiple layers of defense. This is why “All of the above” is the best answer.