Which of the following best describes the purpose of a boiler blowoff system?

The purpose of a boiler blowoff system is primarily to remove sediments and impurities that accumulate in the boiler water during operation. As water is heated, various minerals and contaminants can precipitate out and settle at the bottom of the boiler. If left unchecked, these deposits can lead to reduced efficiency, overheating, and even potential damage to the boiler components. The blowoff system typically consists of a valve that allows for the release of a portion of the boiler water, effectively flushing out these unwanted materials, thereby maintaining cleaner water and extending the operational life of the boiler.

This function is critical not just for operational efficiency but also for ensuring safety, as sediment buildup can lead to dangerous pressure increases or overheating. Other options focus on different aspects of boiler operation, such as energy efficiency, water level management, and pressure regulation, which while important, do not specifically address the primary function of removing impurities from the boiler.