Arkansas Boiler Operator Practice Exam

What leads to improper functioning if a boiler is poorly maintained?

1. Leaking valves

2. Low water levels

3. Scales and deposits

4. Frequent repairs

The correct answer is: Scales and deposits

Improper maintenance of a boiler can result in the accumulation of scales and deposits within the system. Over time, mineral build-up occurs, particularly in the boiler's water passageways and heat exchange surfaces. This buildup reduces the efficiency of heat transfer, leading to overheating of the boiler components and possible failures. As heat transfer efficiency diminishes, the boiler has to work harder to reach the desired pressure and temperature, which not only increases fuel consumption but also raises the risk of malfunction or even catastrophic failures. While leaking valves, low water levels, and frequent repairs are certainly indicative of a poorly functioning boiler, they stem from various other issues rather than being direct consequences of poor maintenance relating specifically to scaling and deposits. Scales and deposits result from insufficient water treatment and inadequate flushing or cleaning of the boiler system, making it a critical aspect of boiler maintenance that can significantly affect boiler performance.