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Backflow Test #1 - Questions With Fully Explained Solutions

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Institution BACKFLOW PREVENTION
Course BACKFLOW PREVENTION
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Backflow Test #1 - Questions With Fully Explained Solutions

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Backflow Test #1 - Questions With Fully
Explained Solutions
Which type of backflow preventer is most reliable Correct Answer
- Air gap

What is the maximum pressure drop a little through a double check
now assembly Correct Answer - 10 psi

To break the back-siphonage action the best approach is Correct
Answer - Introduce air into the system

The maximum height that water can be drawn above a free water
surface by back-siphoange is Correct Answer - 34 feet

Watermain pressure is drastically reduced to a reduce pressure
principal backflow preventer the relief valve should Correct
Answer - Always open to discharge the water in the zone

In approved Errgott must have at least __________of free air space
Correct Answer - A minimum of two pipe diameter of the supply
pipe or 6 inches which ever is lesser

What is the most important step before installing backflow
prevention assemblies in new or existing lines Correct Answer -
Play planes will be flushed all chips scale and foreign matter

A parallel side-by-side backflow prevention assembly installation as
desired in order to Correct Answer - Allow for testing and
maintenance

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