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

No stop valve or shutoff device of any description may be placed between the boiler and the safety valve A lockable gate valve is permitted provided it remains sealed open during normal operation A full-port ball valve may be installed only if equipped with a high-pressure bypass interlock A check valve must be installed to prevent backflow into the boiler vessel