ABC Backflow Prevention Assembly 4

Question 1

A spill-resistant pressure vacuum breaker (SRPVB) differs from a standard PVB primarily because it:

Accepted Answer

Has an enclosure that prevents relief discharge from spilling on the floor

Answer

The SRPVB has an enclosed body that contains any minor relief discharge, making it suitable for indoor installation where a standard PVB's open discharge would be a nuisance.

Question 2

Which component of an RP assembly ensures that the zone between the two check valves remains at a lower pressure than supply, providing the 'reduced pressure' protection?

Accepted Answer

Relief valve

Answer

The differential relief valve maintains the intermediate zone at a pressure lower than supply pressure; if either check leaks, the zone pressure rises and the relief opens to discharge.

Question 3

Under ASSE/AWWA standards, backflow prevention assemblies must be tested how often after initial installation?

Accepted Answer

Annually

Answer

Backflow prevention assemblies must be tested annually (at minimum) by a certified tester to verify all mechanical components are functioning within acceptable parameters.

Question 4

What is the purpose of the bypass valve configuration sometimes used with large-diameter RP assemblies?

Accepted Answer

To allow the assembly to be isolated and tested while maintaining system flow

Answer

A bypass configuration allows water to flow around the assembly being tested or repaired while the primary assembly is isolated, minimizing service disruption.

Question 5

Which scenario BEST describes a cross-connection?

Accepted Answer

A physical link between the potable supply and a non-potable source

Answer

A cross-connection is any actual or potential physical connection between the potable water supply and any source that could introduce contamination.

(ABC) Association of Boards of Certification Practice Test

(ABC) Association of Boards of Certification Practice Test

ABC Backflow Prevention Assembly 4