MS Mechanical Practice Questions - Mississippi Mechanical Contractor Examination Exam

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In a closed hydronic heating system, where should the circulator be arranged relative to the expansion tank for stable fill pressure?

Pump toward the expansion tank so the tank absorbs pump head Pump away from the expansion tank, which is the point of no pressure change Install the expansion tank on the suction of a booster only, never on the boiler loop Omit the expansion tank if the relief valve is set at 30 psi

Correct Answer:

Pump away from the expansion tank, which is the point of no pressure change

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