NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

What is the purpose of a flow-check or spring check on a hydronic supply?

To prevent unwanted gravity circulation when the circulator is off. To increase gravity circulation so the pump can be omitted. To serve as the only ASME relief device on the boiler. To meter combustion air into the burner.

Correct Answer:

To prevent unwanted gravity circulation when the circulator is off.

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