Which of the following is one of the main DISADVANTAGES of using hard water in a boiler?
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A.
Improved water flow
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B.
Increased heating efficiency
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C.
Reduced maintenance costs
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D.
Scaling and limescale buildup
Correct Answer:
D. Scaling and limescale buildup
Explanation:
Using hard water in a boiler primarily leads to the formation of scale and limescale buildup. When water containing high concentrations of calcium and magnesium ions is heated, these minerals precipitate out of the solution and solidify onto the internal surfaces of the boiler, such as the heat exchangers and tubes. This layer of scale acts as an insulator, significantly reducing heat transfer efficiency and forcing the system to consume more fuel to reach desired temperatures. Over time, this buildup can restrict water flow, cause localized overheating that leads to tube failure or cracking, and accelerate the overall wear and tear of the unit, potentially resulting in costly repairs or premature system failure.
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