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

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A natural-draft oil-fired boiler that is not listed for use without one generally requires which draft device in the chimney connector?

A barometric draft regulator. A Type B gas-vent cap only. A steam pressuretrol. A hydronic flow-check.

Correct Answer:

A barometric draft regulator.

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