Which of the following behaviors is inappropriate for a stacker operator feeling fatigued at work?

Drinking alcoholic beverages while operating a stacker or any machinery is inappropriate behavior, particularly when feeling fatigued. Alcohol impairs cognitive functions, including judgment, coordination, and reaction times, which are critical for safe operation of equipment. When an operator is already fatigued, the introduction of alcohol increases the risk of accidents and injuries not only to themselves but also to coworkers and the workplace environment.

In contrast, taking a short break, drinking water, and notifying a supervisor are all proactive and responsible steps that support health and safety. Taking breaks can help reduce fatigue and increase alertness, staying hydrated is essential for maintaining focus and physical health, and informing a supervisor allows for proper management of workload and safety protocols.