Plant Operation Practice Test

What condition can lead to boiler failure if not addressed promptly?

1. Low-water condition

2. High-pressure buildup

3. Excess fuel consumption

4. Inconsistent air supply

The correct answer is: Low-water condition

A low-water condition in a boiler can lead to serious consequences, including boiler failure, if not addressed promptly. When the water level in the boiler drops below the safe operating level, the critical cooling of the boiler tubes is compromised. The tubes can become excessively hot and may even overheat, leading to tube failure and a complete boiler breakdown. In cases of low-water condition, the heat generated from combustion is no longer absorbed by the water, which can result in the metal of the boiler structure being exposed to direct hot gases. This can cause thermal stress and potentially catastrophic damage, including the risk of explosion. Monitoring water levels and having proper water feed systems in place are crucial for safe boiler operation to mitigate these risks. While other conditions such as high-pressure buildup or inconsistent air supply can also pose risks to boiler safety, the immediate and critical nature of low-water conditions directly impacts the integrity of the boiler’s components, making it essential to address any signs of low water levels quickly to ensure safe operation.