What should be done to correct a low water condition in a boiler?

To correct a low water condition in a boiler, securing the fires is the appropriate action because it immediately addresses the safety risk associated with low water levels. A low water condition can lead to overheating and potential damage to the boiler components, including the risk of a boiler explosion. By stopping the combustion process, you prevent any further increase in temperature within the boiler, safeguarding the integrity of the equipment.

Addressing the condition by securing the fires mitigates the immediate danger while you take the necessary steps to restore proper water levels safely. This response ensures that the system can be assessed and adjusted without risking further complications from excessive heat or pressure.

In contrast, adding fuel, increasing steam pressure, or opening the feed water valve may exacerbate the problem. Adding fuel would increase heat and potentially lead to damage, increasing steam pressure would add additional stress on the boiler, and opening the feed water valve may not properly address the immediate risks posed by the low water level. Each of these actions could lead to further complications if not handled cautiously.