Stop valves, disconnect switches, and circuit breakers are examples of _____.

Stop valves, disconnect switches, and circuit breakers are examples of _____.

• A. Personal protective equipment
• B. Lockout/tagout devices
• C. Grounding devices
• D. Safety barriers

Answer: (B)

The concept being tested is how equipment is isolated from energy sources to protect workers during maintenance. Stop valves, disconnect switches, and circuit breakers are energy-isolating devices used in lockout/tagout programs. They intentionally shut off or interrupt the energy supply to equipment. In a lockout/tagout process, a lock or tag is placed on these devices to prevent accidental re-energization, ensuring the equipment cannot be started while someone is servicing it. This direct control of energy sources is what keeps workers safe from unexpected startup or release of hazardous energy. PPE protects individuals, but it doesn’t stop the equipment from being energized. Grounding devices provide a path to earth for fault currents, not a method to keep energy off. Safety barriers block access but don’t stop the energy supply itself.

The concept being tested is how equipment is isolated from energy sources to protect workers during maintenance. Stop valves, disconnect switches, and circuit breakers are energy-isolating devices used in lockout/tagout programs. They intentionally shut off or interrupt the energy supply to equipment. In a lockout/tagout process, a lock or tag is placed on these devices to prevent accidental re-energization, ensuring the equipment cannot be started while someone is servicing it. This direct control of energy sources is what keeps workers safe from unexpected startup or release of hazardous energy.

PPE protects individuals, but it doesn’t stop the equipment from being energized. Grounding devices provide a path to earth for fault currents, not a method to keep energy off. Safety barriers block access but don’t stop the energy supply itself.