What action should a worker take if they find that a guard has been bypassed?

When a worker discovers that a guard has been bypassed, the most appropriate action is to immediately lockout the machine. This is crucial because guards are put in place to protect workers from hazardous moving parts or dangerous conditions during machine operation. By locking out the machine, the worker ensures that no one can inadvertently operate the equipment, which could lead to serious injury or even fatal accidents.

Lockout procedures are a vital component of workplace safety practices. They involve isolating the energy sources of machinery and securely locking them to prevent accidental activation. This action protects not only the individual who discovered the issue but also their coworkers who may be working nearby. The emphasis on immediate action is key; even a moment's inattention could result in a dangerous situation if the machine were to be turned on without proper safety barriers in place.

The other options do not provide an immediate solution to the hazardous situation created by the bypassed guard. Reporting it and continuing to work offers no immediate protection. Checking other machines does not address the present risk. Informing a colleague would be a good measure but does not ensure that the dangerous machine is secured. Locking it out is a proactive step that prioritizes safety first and foremost.