NM CID MM-2 Practice Questions - New Mexico CID MM-2 Natural Gas Fitting Examination Exam

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A direct-vent furnace uses a concentric wall terminal. The contractor also tees a draft-hood water heater into that concentric pipe. What is required?

Approve the tee because both are gas appliances Remove the tee; a direct-vent terminal is a listed system for that appliance and shall not be used as a common vent for a draft-hood appliance Approve it if the concentric pipe is increased to 4 inches Approve it below 5,000 feet elevation only

Correct Answer:

Remove the tee; a direct-vent terminal is a listed system for that appliance and shall not be used as a common vent for a draft-hood appliance

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