Questions and Recommended References for ABC's backflow Prevention Assembly exam, Exams of Water Resources Planning and Management

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Questions and Recommended

References for ABC's backflow

Prevention Assembly exam

1. A leaking check valve # 2 of a reduced pressure assembly and backpressure may cause - Correct Ans: ✔✔Relief valve discharge
2. What could be the t problem if the relief r valve of a reduced pressure assembly discharges into intermittently? - Correct Ans: ✔✔Large pressure fluctuations
3. Which of the following backflow assemblies contains an independently operating internally loaded check valve and an independently operating loaded air inlet valve located on the discharge side of the check? - Correct Ans: ✔✔Pressure vacuum breaker assembly
4. Which of the following backflow assemblies is allowable for use against a contaminant when the backflow could be caused by backpressure? - Correct Ans: ✔✔
5. While testing check valve number two of the reduced pressure backflow assembly under back pressure, what would be observed if the second check valve was fouled? - Correct Ans: ✔✔

6. What could be determined while testing check valve number 1 of a double check valve assembly if the gauge reads 0.7 PSID? - Correct Ans: ✔✔
7. What could a tester determine if water is observed flowing from the air inlet of the pressure vacuum breaker prior to starting the test? - Correct Ans: ✔✔
8. 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 number 1? - Correct Ans: ✔✔
9. When testing a reduced pressure assembly a test kit is used to determine the difference between - Correct Ans: ✔✔
10. What is the pressure at the base of a 100 foot high standpipe filled with water? - Correct Ans: ✔✔43.3 psi
11. A column of water exerts pressure at the bottom of a column due to - Correct Ans: ✔✔Weight of the water
12. What is the primary consideration when deciding whether to install a reduced pressure or a double valve assembly? - Correct Ans: ✔✔Degree of hazard

13. 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 - Correct Ans: ✔✔Water, Water, steam, steam, gases, gases, chemicals, or unknown substances
14. What types of backflow conditions? - Correct Ans: ✔✔Backpressure and back siphonage
15. A link between a potable water supply and any non-potable supply or source is called a(n) - Correct Ans: ✔✔Cross connection
16. A check valve in an approved backflow assembly must be - Correct Ans: ✔✔Resilient seated and loaded to the closed position
17. To avoid creating water hammer, when returning a backflow prevention assembly to service the tester should - Correct Ans: ✔✔Slowly pressurize the assembly and then slowly pressurize the downstream piping
18. In a backsiphonage condition, the check valves of a double check assembly will bo - Correct Ans: ✔✔1 check closed and 2d check closed

19. How many test cocks must an approved double check valve assembly have? - Correct Ans: ✔✔ 4