AZ ROC R-4 Boilers Including Solar Practice Questions - Arizona ROC R-4 Boilers Including Solar (Residential) Examination Exam

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Per IRC Section M2002.5, which safety device is required on all automatically fired hot water boilers to prevent burner operation if the boiler water drops below the safe operating level?

Thermal expansion valve Low water cut-off (LWCO) Automatic air scoop Backflow preventer with atmospheric vent

Correct Answer:

Low water cut-off (LWCO)

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