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

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Which valve type is the correct first choice for isolating a boiler supply main, and which type is preferred for throttling?

Globe valve for isolation; gate valve for throttling Gate (or full-port ball) valve for isolation; globe valve for throttling Check valve for isolation; butterfly valve for fill only Safety valve for isolation; plug cock for throttling

Correct Answer:

Gate (or full-port ball) valve for isolation; globe valve for throttling

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