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Backflow Test | 63 Questions and Answers 100% Correct | Updated $12.49   Add to cart

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Backflow Test | 63 Questions and Answers 100% Correct | Updated

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  • Backflow Prevention

Backflow Test | 63 Questions and Answers 100% Correct | Updated

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  • August 20, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • backflow test
  • Backflow prevention
  • Backflow prevention
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StudySet
Backflow Test | 63 Questions and Answers
100% Correct | Updated 2024-2025
If an RPBA continually drips or drains under full flow conditions - ANSWER The
#2 check valve is fouled


When a residential property has a backflow-prevention device/assembly installed
on the service line the best means to control thermal expansion is with a -
ANSWER Thermal expansion tank


According to the Nebraska regulations what is the minimum acceptable air gap for
a 2" pipe located 1" from the wall - ANSWER 6"


The RPBA must have a provision to drain away at least _____ times the rated flow
of the assembly - ANSWER 4


When velocity of the water flowing in a service pipe increases, the pressure
available at the consumers tap _________ - ANSWER Decreases


The second check valve of a DCVA has become distorted. What could have caused
this? - ANSWER Water hammer


The RPBA #1 check valve is ___________ - ANSWER A heavier spring than used
in the #2 check valve


The check valve spring of a PVB ________ - ANSWER Closes the check valve

, The _____ test cock of an RPBA is located on the inlet side of the assembly -
ANSWER #1


If a 10" RPBA doesnt test properly - ANSWER Check to see if the downstream
gate valve is leaking


Back flow prevention testing equipment should be accuracy verified at least every
_______ - ANSWER year


A damaged or dirty disc or seat of an RPBA may account for ______ - ANSWER
A low first check differential


Inconsistent, erratic test results found when testing a RPBA means that -
ANSWER There is air in the assembly


If you get "impossible" test kit readings when testing an assembly - ANSWER
First check to see if hoses are hooked up to the right test ports


When testing a PVB, the air inlet valve does not open as the gauge drops to 0 -
ANSWER The air inlet disc is stuck to the seat in the up position


To continue practicing the profession, grade 6 operators must complete CE before
the expiration date of every ________ year renewal period - ANSWER 3


Nebraska regulations require that backflow prevention assemblies be tested
________ - ANSWER Once each year

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