To comply with boiler standards, what should be done if a gage glass becomes clouded?

A clouded gauge glass can hinder a boiler operator's ability to accurately assess the water level within the boiler, which is crucial for safe operation. The correct course of action is to replace the gauge glass when it becomes clouded. Doing so ensures that the operator can clearly see the water level, minimizing the risk of low water conditions that could lead to overheating or damaging the boiler.

While cleaning might make the gauge glass more transparent in some cases, it does not guarantee the integrity or reliability required for safe boiler operation. Therefore, replacing a clouded gauge glass is not just a precaution; it is necessary to maintain compliance with boiler standards and ensure the safety of the system. The other options do not adequately address the safety and operational requirements associated with boiler gauge glasses.