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

What is the usual purpose of zone valves or zone circulators on a hydronic heating system?

To isolate the relief valve so it cannot discharge. To heat different areas on independent thermostats without running every emitter at once. To convert a hot-water boiler into a steam boiler overnight. To raise oil-nozzle pressure in cold weather.

Correct Answer:

To heat different areas on independent thermostats without running every emitter at once.

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