SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

Shutoff valves in the supply and return piping of a boiler are required in which situation?

Never, because they would trap the relief valve On every boiler or modular boiler, and individually on each boiler in a multiple-boiler plant, except that shutoff valves are not required in a system having a single low-pressure steam boiler Only on domestic water heaters Only on the fuel-gas train

Correct Answer:

On every boiler or modular boiler, and individually on each boiler in a multiple-boiler plant, except that shutoff valves are not required in a system having a single low-pressure steam boiler

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