FREE AND STUDY GAMES ABOUT BACKFLOW EXAM

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FREE AND STUDY GAMES ABOUT BACKFLOW EXAM

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -44 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What is the minimum acceptable pressure differential across check valves when testing a Double Check fire backflow preventer assembly?

Answer:

0.5 psi Question 2: What may be determined when testing the air inlet valve of an approved pressure vacuum breaker if the air inlet valve is observed to open after closing shut off valve #1

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Shutoff valve #2 is leaking with flow downstream Question 3: What is the purpose of testing the different pressures on a Backflow assembly?

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Check spring tension, make sure check valve is seated and record for test reports Question 4: What is the primary consideration when deciding whether to install a reduced pressure or a double check valve assembly?

Answer:

The degree of hazard (secondary considerations are: sidewall clearance and distance from ground level)

Question 5: What is the purpose of the spring in the relief valve assembly of a Reduced Pressure Principle Backflow Preventer?

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To force the relief valve open Question 6: To test check valve #2 of the reduced pressure assembly for tightness against backpressure, which test kit control valve must be open?

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High and Bypass Question 7: Where is the #2 test cock of a double check backflow prevention assembly located?

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Upstream of check valve #1 Question 8: What is the suggested minimum distance between the relief valve discharge Port of a reduced pressure principle backflow preventer assembly and the flood level rim of the surrounding area?

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12 inches Question 9: While testing a reduced pressure assembly, if the high side hose is connected to test cock #3 and the low side is connected to test cock # 2, the neddele on the test kit gauge will indicate.

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No differential Question 10: What is the maximum flow temperature for the hose bib vacuum breaker?

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180 degrees Question 11: Where is the best place for the installation of a Backflow Prevention Assembly?

Answer:

In an easily accessible location in a heated building.

Question 12: Which of the following backflow assemblies contain and independently operating internally loaded check valve and and independently operating loaded air inlet valve located on the check?

Answer:

A pressure vacuum breaker assembly

Question 13: A double check valve assembly must be tested every

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12 months Question 14: A leaking check valve #2 of a reduced pressure assembly and back pressure will cause this.

Answer:

The relief valve to discharge

Question 15: What are two types of Cross connections?

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Direct and indirect Question 16: A link between a potable water supply and any non potable supply or source is called a

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Cross connection Question 17: A hose connection backflow preventer is a high hazard protection valve the contains 2....

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Vent ports Question 18: What is the maximum height for a perfect vacuum (at sea level) to raise water in a pipe?

Answer:

34'

Question 19: A column of water exerts pressure at the bottom of a column due to

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The weight of the water Question 20: What could be determined while testing check valve number one of a double check valve assembly if the gauge reads 0.7 psid?

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Check valve #1 is defective Question 21: How many tests Cocks must an approved double check valve assembly have?

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Four Question 22: During any backsiphonage condition, the check valves of a double check assembly will be

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First check closed and second check closed Question 23: To convert 'feet of head" to psi must MULTIPLY by:

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.433 Question 24: When testing the relief Opening Point on a reduced pressure back Flow assembly, the tester needed to open the low control valve more than a 1/4 of a turn. What would this indicate?

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Relief valve leaks Question 25: A cross connection is an actual or potential connection that could allow backflow to occur between a potable water system and a piping system that contains potentially unsafe

Answer:

Water, steam, gases, chemicals, or unknown substances