If you are unable to correct the white smoke condition within one minute, what must be done?

The correct action to take when unable to correct the white smoke condition within one minute is to secure the boiler. White smoke typically indicates that there is an issue with incomplete combustion or excess fuel, which can lead to unburned fuel entering the boiler system. Allowing the condition to persist can result in damage to the equipment, unhealthy operating conditions, or even a potential fire hazard.

Securing the boiler is a critical safety measure to prevent further complications and to safeguard personnel and equipment. This involves shutting down the boiler operation to stop the production of smoke and to facilitate a thorough investigation and correction of the underlying issue before any attempts to return to normal operations can begin.

The other actions, while important in troubleshooting and maintaining boiler operations, do not address the immediate safety concern posed by an unresolved white smoke condition. Increasing pressure or adjusting fuel flow may exacerbate the problem if the fundamental issue with combustion isn't resolved first, while simply contacting the chief engineer, although necessary for reporting and record-keeping, does not directly address the urgent need to secure the boiler for safety.