SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

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Where the maximum allowable working pressure of a steam boiler exceeds 100 psig, IMC 1008.1 requires which bottom-blowoff arrangement?

A single quarter-turn ball valve of any size Two bottom blowoff valves in series: either two slow-opening valves, or one quick-opening valve (closest to the boiler) and one slow-opening valve No blowoff if a surface skimmer is installed A hose bibb on the gauge glass

Correct Answer:

Two bottom blowoff valves in series: either two slow-opening valves, or one quick-opening valve (closest to the boiler) and one slow-opening valve

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