Exit NFPA-CWBSP Certified Water-Based Systems Professionals (CWBS)
Question 1 of 5
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Q1 Single choice

Antifreeze systems that contain a backflow preventer between the antifreeze piping and the wet pipe system must be equipped with _______

  • A

    a relief valve.

  • B

    a sight glass.

  • C

    an accelerator.

  • D

    an expansion chamber.

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