Which situation can lead to pump and draft fan failures in a boiler system?

A power outage can lead to pump and draft fan failures in a boiler system because these components rely on electrical power to operate. When there is a power interruption, pumps that circulate water and draft fans that manage the air supply may stop functioning. This can cause a drop in water circulation, leading to potential overheating and subsequent mechanical failures. Additionally, the lack of proper air supply can hinder combustion, affecting boiler performance and safety.

In contrast, high water levels in the steam drum can create operational issues, but they typically wouldn't lead to direct mechanical failure of pumps or draft fans in the same immediate manner as a power outage. Corrosion can compromise the structural integrity of system components over time, but it is not an immediate cause of failure. Excessive soot accumulation can impede airflow and contribute to operational problems, but again, it doesn't directly cause equipment failure like a sudden power loss does.