Backflow Prevention Final Exam Questions and Answers | Latest Update | 2024/2025 | Graded A+

Backflow Prevention Final Exam Questions and Answers | Latest Update | 2024/2025 | Graded A+ 8. Backpressure will cause backflow: a) through an unprotected over the rim feed to an open make-up water tank b) through an unprotected over the rim gravity feed line to an open wash tank c) through an unprotected feed to a closed make-up water tank d) through an unprotected feed to a cattle watering trough c) through an unprotected feed to a closed make-up water tank 9. In testing a reduced pressure principle backflow prevention assembly: a) the relief valve must be tested first b) the apparent drop across the first check valve must be tested first c) the second check must be tested first d) the flow rate must be tested first a) the relief valve must be tested first 10. A water purveyor or public health agency may require more frequent testing of a backflow prevention assembly than the maximum time allowed between testing. What is the maximum legal length of time permitted between tests: a) six months b) eighteen months c) twelve weeks d) twelve months d) twelve months 11. Which of the following types of cross connections are considered to be illegal? a) a by-pass hose with a shut off valve installed around a reduced pressure principle backflow prevention assembly b) a supply line to a boiler from a domestic service equipped with a reduced pressure principle backflow prevention assembly c) a service to a single family residence d) an air gapped service to a high rise building a) a by-pass hose with a shut off valve installed around a reduced pressure principle backflow prevention assembly 12. Backsiphonage due to an aspirator effect maybe caused by: a) a sudden increase of the water supply b) high velocity flow of water through a tee in a piping system c) water from a high pressure pump against the number two check valve of an approved double check valve assembly d) a hose equipped with an anti-siphon valve at the hose bib being dropped into an open tank b) high velocity flow of water through a tee in a piping system 13. When installed correctly pressure vacuum breakers shall be: a) 12" above the highest point of piping and usage b) have no shut off valves downstream c) have no backpressure on the assembly d) a and b above e) a and c above e) a and c above (a) 12" above the highest point of piping and usage (c) have no backpressure on the assembly 14. Which of the following is the backflow protection