Relying on your senses will always alert you to the presence of a hazard.

Relying solely on your senses to detect hazards is not sufficient, so the correct answer is that it is false. Many hazardous materials are odorless, colorless, or otherwise imperceptible to human senses. For instance, toxic gases like carbon monoxide cannot be detected by smell, while various chemical spills can occur without any visible signs.

Furthermore, certain situations may expose workers to hazards at levels that are below sensory detection but are still dangerous. This is why proper training, use of personal protective equipment, and monitoring devices are essential in hazardous waste operations and emergency response. These protective measures ensure comprehensive safety beyond what can be perceived through sight, sound, or smell alone. Such reliance can lead to serious injury or fatality if unseen hazards are present.