____ backflow is a reversal of normal flow in a system caused by a negative pressure (vacuum) in the potable water supply.
A) Gravity
B) Back-siphonage
C) Back-pressure
D) none of the above
Correct Answer:
Verified
Q3: In general, backflow prevention devices should not
Q7: Which of the following backflow prevention methods
Q8: A polluted system can be referred to
Q9: The minimum distance for an air gap
Q10: _ backflow is a reversal of normal
Q11: If a faucet with a ½-inch opening
Q13: The level of backflow protection required is
Q14: _ occurs when unsafe water flows into
Q14: Back-pressure backflow is the same as back-siphonage
Q15: Most dishwashers have a(n)_ as an internal
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