New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

Question: 1 / 495

What is the main purpose of an expansion tank in a boiler system?

To store excess fuel

To provide space for expansion of water

The main purpose of an expansion tank in a boiler system is to provide space for the expansion of water as it heats up. When water is heated, it expands, which can lead to increased pressure in the boiler system. The expansion tank absorbs this excess water, accommodating the volume change without allowing the pressure to rise to unsafe levels. This is essential for maintaining the system's integrity and ensuring safe operation.

Other roles of components such as storage tanks, condensate return systems, or filtration devices do not pertain to the function of an expansion tank. Options that suggest storing excess fuel, collecting condensate, or filtering impurities are related to different aspects of boiler operation but do not address the critical need for managing the physical expansion of water in a closed heating system.

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To collect condensate

To filter impurities from water

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