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

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Near-boiler piping for a modern low-mass or condensing boiler often includes a primary loop so that which condition is met?

The boiler heat exchanger always has the minimum flow its listing requires, even if zones close. The relief valve can be valved off during a call for heat. Combustion air is taken from the expansion tank. The chimney connector can run downhill to the vent.

Correct Answer:

The boiler heat exchanger always has the minimum flow its listing requires, even if zones close.

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