What are the three safety features built into the compressed gas system to prevent incorrect gas connections?

The correct choice highlights the importance of color-coding as a safety feature within the compressed gas system. Color-coding provides a visual reference designed to prevent incorrect gas connections by standardizing the colors assigned to different gases. Each type of medical gas is associated with a specific color for its cylinder and fittings, making it easier for healthcare professionals to identify the correct gas quickly and avoid mixing or connecting incompatible gases.

This visual aid facilitates the safe handling and administration of gases in medical settings, where accuracy is crucial. By utilizing distinct colors for each gas, personnel can instantly recognize and ensure they are handling the right type of gas necessary for a patient's treatment, thus reducing the risk of mistakes that could potentially lead to adverse outcomes.