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Michigan Hydronic Heating, Cooling & Process Piping Practice Exam With Expert Solutions

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1. What is the primary purpose of an expansion tank in a hydronic heating system? A. Increase water pressure B. Absorb thermal expansion of water C. Remove air from the system D. Store additional hot water Correct Answer: B Explanation: As water is heated, it expands. The expansion tank absorbs the increased volume, preventing excess pressure.

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Michigan Hydronic Heating, Cooling &

Process Piping Practice Exam

1. What is the primary purpose of an expansion tank in a hydronic

heating system?




A. Increase water pressure


B. Absorb thermal expansion of water


C. Remove air from the system


D. Store additional hot water




✅ Correct Answer: B


Explanation: As water is heated, it expands. The expansion tank

absorbs the increased volume, preventing excess pressure.

,2. What type of valve is typically used to balance flow in hydronic

systems?




A. Gate valve


B. Globe valve


C. Check valve


D. Ball valve




✅ Correct Answer: B


Explanation: Globe valves offer good throttling capability, making

them ideal for balancing flow.

, 3. What is the typical material used for chilled water piping in

commercial applications?




A. Steel


B. Copper


C. PEX


D. PVC




✅ Correct Answer: A


Explanation: Steel piping is durable and suitable for large systems

with high pressure and temperature differentials.




4. Which of the following is used to prevent air from entering a

closed-loop hydronic system?

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