What type of device can serve as a lockout device?

A lock, either key or combination, is an effective lockout device because it is specifically designed to prevent unauthorized access or operation of machinery or equipment during maintenance or repair. The primary purpose of a lockout device is to ensure that equipment cannot be accidentally energized or moved while personnel are working on it, thus maintaining safety in the work environment.

This type of device functions by physically blocking the operation of machinery, making it impossible for anyone to unknowingly start or activate the equipment while it is being serviced. Using a lock means that only authorized personnel who possess the key or combination can remove the device and restore the equipment to its operational state, thereby safeguarding the workers involved in the process.

Other options such as plastic wrap, a safety vest, or a wrench do not provide the same level of safety and control. Plastic wrap cannot physically secure equipment or prevent its operation; it is not durable enough or designed for this purpose. A safety vest is meant for visibility and does not have locking capabilities. Although a wrench can be used in maintenance work, it does not serve as a lockout device. It could, in theory, be used to immobilize certain parts, but it does not provide a reliable means of ensuring that equipment remains off-limits during maintenance.