Exam (elaborations)
Backflow Test | 63 Questions and Answers 100% Correct | Updated
- Course
- Institution
Backflow Test | 63 Questions and Answers 100% Correct | Updated
[Show more]
Content preview
Backflow Test | 63 Questions and Answers100% 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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller StudySet. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now