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Question 1 of 5
1. Question
Which is a type of backflow?
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Question 2 of 5
2. Question
Which has a higher PSI rating?
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Question 3 of 5
3. Question
Which of these is used on a fire protection system?
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Question 4 of 5
4. Question
Back siphonage occurs when:
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Question 5 of 5
5. Question
Back pressure occurs when:
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