Class 5 Boiler Practice Exam

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What is the primary function of a blowdown valve in boiler maintenance?

To increase pressure
To release steam
To remove sediments
To control water levels

The correct answer is: To remove sediments

The primary function of a blowdown valve in boiler maintenance is to remove sediments and impurities from the boiler water. Over time, dissolved solids, minerals, and other contaminants can accumulate in the boiler water. These sediments can lead to scale buildup on the heating surfaces and other components, which can impair heat transfer, reduce efficiency, and potentially damage the boiler. By periodically opening the blowdown valve, operators can effectively remove a portion of the water that contains these unwanted solids, thus maintaining water quality and preventing issues associated with high concentrations of contaminants. Monitoring and managing the blowdown process is crucial for safe operation and prolonging the lifespan of the boiler. This practice is essential in ensuring that the efficiency and reliability of the boiler system are upheld.