If the sight glass breaks while the boiler is operating, what should you NOT do?

When a sight glass breaks while a boiler is operating, it is crucial to prioritize safety and the integrity of the boiler system. Continuing to operate the boiler in such a situation is unsafe and could lead to catastrophic failure or accidents. The sight glass serves a vital function in indicating the water level, and a damaged sight glass means that the operator cannot accurately monitor this critical parameter. Operating the boiler without proper knowledge of the water level could result in low water conditions that may cause overheating, damage to the boiler, or even an explosion.

It is essential to take immediate action to mitigate the situation safely. Putting on safety equipment, using gauge glass shut-off valves to isolate the broken sight glass, and checking the water level with a tricock are all appropriate actions to contain the issue and maintain safety. Thus, the decision to continue operating the boiler would ignore the immediate hazards presented by the broken sight glass, making it the incorrect course of action in this scenario.