AK HVAC Practice Questions - Alaska Mechanical Administrator HVAC License Exam

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An Alaska HVAC contractor is installing a new boiler system. What type of expansion tank is required for a closed hydronic heating system?

No expansion tank is needed for closed systems A diaphragm or bladder-type expansion tank An open expansion tank vented to the atmosphere A standard water heater tank

Correct Answer:

A diaphragm or bladder-type expansion tank

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