Technical Standards and Safety Authority (TSSA) G3 Practice Exam

Who is permitted to remove a lock used to lock out equipment?

1. A supervisor

2. The person who installed the equipment

3. The person who installed the lock

4. Both a and c

The correct answer is: Both a and c

The correct response reflects the principle of lockout/tagout (LOTO) safety procedures, which are crucial for ensuring the safety of workers during maintenance or repair work on machinery and equipment. The fundamental rule is that only the individual who applied the lock or tag, or a designated supervisor who is authorized to oversee safety protocols, is permitted to remove it. When a worker applies a lock to isolate equipment to ensure that it cannot be powered on while they are servicing it, they are responsible for the safety of that lockout. This means they have the unique knowledge of their work and the circumstances that led to the lockout, making them the only appropriate individual to remove it. Allowing someone else to remove the lock, without the lock installer’s consent or knowledge, could lead to unsafe conditions where equipment is inadvertently re-energized. The inclusion of supervisors in this procedure also enhances safety. Supervisors typically have the responsibility of ensuring all safety protocols are followed. In situations where the lock installer is not available (for example, if they are no longer on-site), a supervisor can step in to safely remove the lock under proper procedures, ensuring the safety of all while adhering to workplace protocols. This understanding is fundamental to maintaining a safe working environment and is a