1. A consumer claims his DCVA need to be inflicting a consistent reduction of pressure
during the last 6 months. Your choice is probably to - ANS-Replace the service line
because its possibly complete of scale
2. A damaged or grimy disc or seat of an RPBA can also account for ______ - ANS-A low
first take a look at differential
3. A differential stress gauge described inside the Nebraska standards for testing backflow
preventers must be designed for ________ - ANS-0-15 PSID
4. A differential stress remedy vlave on an RPBA that failed after checking out can have
_________ which must be inspected - ANS-Diaphragms
5. A leaky test valve of a DCVA could be because of _________ - ANS-The manual
individuals placing up
6. A trouble every so often after repairing a DCVA is _______ - ANS-A noisy vibration
7. A PWS working towards containment to shield the water system from pass connections
encounters an unprotected faucet between the meter and the backflow prevention
assembly. In this case.... - ANS-The set up should now not be authorized
8. A water column fifty five 1./2" excessive will create a stress of _______ psi at the bottom
- ANS-2
9. A water heater thermal growth manage is needed through ______ when a containment
device/assembly is installed - ANS-some plumbing codes
10. According to the Nebraska policies what is the minimum ideal air hole for a 2" pipe
located 1" from the wall - ANS-6"
11. After a backflow prevention assembly has been tested, a duplicate of the licensed
outcomes is provided to the ______ - ANS-Owner
12. Although not recommended because of the high chance of contamination, Nebraska
requirements describe mercury manometers can be used to calibrate - ANS-Differential
strain gauges
13. Atmospheric stress at sea level is set ______ psi - ANS-14.7
14. Back flow prevention testing device have to be accuracy validated as a minimum every
_______ - ANS-year
15. DCVA and RPBA installations require ________ minimal clearance below the meeting
and a maximum of _________ above floor, work floor, or everlasting working platform -
ANS-1'
16. 5'
17. For all backflow assemblies.... - ANS-There is no check port down flow from shut off
valve #2
18. For the go with the flow costs specified within the Nebraska standards, the most strain
loss allowed for all sizes of DCVA is..... - ANS-10 psi
19. High danger locations in line with the NDHSS DPH rules include _______ - ANS-Truck
(water) loading stations
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