

Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
BACKFLOW PREVENTION PRACTICE TEST
Typology: Exams
1 / 3
This page cannot be seen from the preview
Don't miss anything!


While conducting the first test on a Spill Resistant Vacuum Breaker, when the vent screw is removed the air inlet valve opens and the gauge falls to zero. What would this indicate? - Answers - A faulty check valve The differential pressure relief valve of a reduced pressure principle assembly is closed by: - Answers - System water pressure While conducting the first test on a double check assembly. When the number the number three test cock is opened, water continues to flow and will not stop. What is the proper way to proceed? - Answers - Observe the reading on the gauge A booster pump is utilized to increase water pressure for the water user. When water pressure is increased within the internal water system to a higher pressure than the water suppliers pressure this creates: - Answers - Back pressure When testing a double check valve assembly, the test gauge and water in a sight tube must: - Answers - Remain at the same level The first recordable value a tester must obtain when testing a reduced pressure principle backflow prevention assembly is: - Answers - The relief valve opening point When conducting a test on a reduced pressure principle assembly, when flushing the kit in preparation for the test, the tester should close things in what order? - Answers - Close the #2 SOV, high side bleed and then the low side bleed Degree of hazard determines what? - Answers - What type of backflow assembly to install While conducting a test on a double check valve assembly, when the tester opens the test cock with the sight tube, the gauge stays at the upper end of the scale. What would this indicate? - Answers - The gauge and the sight tube have been incorrectly applied A tester has conducted a test on a reduced pressure principle assembly with the following results - relief valve opened at 3.2, #2 check held tight against backpressure and the #1 check held steady differential of 4.9. What does this indicate? - Answers - The assembly has failed the test The largest size of backflow prevention assemblies are: - Answers - 2" for pressure vacuum breakers, spill resistant vacuum breakers and 12" for double check valves and reduced pressure principle assemblies
A tester is conducting the second check test on a reduced pressure principle assembly and when the bypass control needle is opened, the gauge reading increases slightly. What must the tester do after seeing this? - Answers - Close the #2 test cock During the #1 check test on a double check valve assembly when the #3 test cock is opened, the water in the sight tube recedes. What would this indicate and what should the test do next? - Answers - The #2 check is faulty and the #2 shut off valve is leaking by. The tester should stop the test and fail the assembly Supply water pressure on a reduced pressure principle closes the relief valve. What causes the check valve on a pressure vacuum breaker to close? - Answers - The check spring The #1 check valve in the double check assembly is loaded to 1 PSI or greater, the # check of the Reduced Pressure Principle Assembly is loaded to? - Answers - 5.0 PSI or greater While conducting the first test on a pressure vacuum breaker, the tester finds the # shut off valve is leaking by. After following procedure of opening the #1 test cock and reopening the high bleed 1/4 turn, the air inlet still will not open and water continues to flow. What should the tester do next? - Answers - Fail the air inlet and move to the check test The pressure loss across a reduced pressure principle assembly is what depending on the size of the assembly? - Answers - 13 to 24 PSI Test cock #1 on a reduced pressure principle assembly can be utilized to gain passing test results if the assembly has; - Answers - A slightly leaking #2 SOV with usage On a type 2 Double Check Detector Assembly the test procedures should be done in what manner? - Answers - The bypass check, the main #1 check valve and then the # check A barometric loop containing potable water from a water distribution system must be how high at a minimum? - Answers - 35 feet A proper air gap is defined as: - Answers - Two times the diameter of the supply pipe above the flood rim of the receiving vessel and never less than 1 inch When a water supply enters a Spill Resistant Vacuum Breaker Assembly the water; - Answers - Passes through the open #1 SOV, closes the air inlet, opens the check valve and proceeds through the open #2 shut off valve Flushing the relief valve of a reduced pressure principle assembly can be achieved by - Answers - Closing both #1 and #2 SOV's and open the #2 test cock