A backflow prevent used in a hydronic heating syst...

Gas Fitter 2 Practice Test

Question Number 20

A backflow prevent used in a hydronic heating system is used to:

A. Keep hot water from entering the cold water system

B. Hold the pressure on the system during a temporary shutdown to prevent the entry of air

C. Prevent the heating water from circulating the wrong way in the system

D. Keep non-combustible water from entering the drinking water system

✔ Correct Answer:

D. Keep non-combustible water from entering the drinking water system

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Gas Fitter 2 Practice Test

Question Number 20

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