AZ ROC Boilers, Steamfitting & Process Piping (C-4 CR-4) Practice Questions - Arizona ROC C-4 CR-4 Boilers, Steamfitting And Process Piping Examination Exam

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When installing a two-valve bottom blowdown line on a high-pressure steam boiler (operating above 100 psig), in what sequence should the valves be arranged from the boiler shell outward?

A slow-opening valve closest to the boiler, followed by a check valve Two quick-opening blowoff valves placed in series A quick-opening valve closest to the boiler, followed by a non-return valve A quick-opening valve closest to the boiler shell, followed by a slow-opening valve

Correct Answer:

A quick-opening valve closest to the boiler shell, followed by a slow-opening valve

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