SC Boiler Installation Practice Questions - South Carolina Boiler Installation Contractor Examination Exam

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A steam boiler has a maximum allowable working pressure of 125 psig. How must its bottom blowoff valves be arranged under the 2021 IMC?

Two slow-opening valves in series, or one quick-opening valve and one slow-opening valve in series with the quick-opening valve closest to the boiler Two quick-opening valves in parallel on a Y-base A single slow-opening valve plus a check valve One quick-opening valve is sufficient at any pressure

Correct Answer:

Two slow-opening valves in series, or one quick-opening valve and one slow-opening valve in series with the quick-opening valve closest to the boiler

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