Examen
Backflow Practice Exam All Possible Questions and Answers with complete solution
- Grado
- Institución
1) Backflow is the undesirable reversal of flow of water or other substances through a cross connection into the public water system or consumer's: - C. Public water system or consumer's portable water system 2) An approved airgap (AG) is a physical separation between the free-flowing end of a: ...
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