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FREE AND STUDY GAMES ABOUT BACKFLOW CH (1-10)
EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -98 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Backflow preventers that open to air must not be installed in areas of
Answer:
Toxic fumes
Question 2: A reduced pressure principle assembly installed in a vault must
Answer:
Be removed Question 3: The air inlet valve of an atmospheric vacuum breaker is fully open when the valves water pressure reaches _______ psig
Answer:
Question 4: The number of required test cocks on an atmospheric vacuum breaker is
Answer:
Question 5: To operate, a barometric loop must be installed
Answer:
At the discharge of a vacuum pump.
Question 6: Test cock number 3 of a double check valve assembly is located
Answer:
Downstream of check valve number 1
Question 7: For fluids to flow, there must be a path and a
Answer:
Difference in pressure Question 8: A spill resistant vacuum breakers check valve must be drip tight at _______ differential
Answer:
- psig
Question 9: The base of a water column 20ft high produce of ______ psig
Answer:
8.7 psi (ex. 20 x .433 = 8.66)
Question 10: The purpose of a reduced pressure principle assembly is to
Answer:
Vent Contaminants to Atmosphere Question 11: A pressure type vacuum breaker assembly may be used for the containment of a
Answer:
Irrigation system Question 12: The critical installation level above a fixture use for an atmospheric vacuum breaker is _______ inches
Answer:
- inches
Question 13: Discharge piping is not close to a wall if the distance is at least ______ diameter
Answer:
- diameter
Question 14: The barometric loop piping rise is approximately _______ feet
Answer:
35 ft.
Question 15: Never permit a backflow preventer to be installed where it can be
Answer:
Submerged Question 16: With an equal vacuum applied, a fluid lighter than water will produce a column elevation
Answer:
Higher than water
Question 17: An airgap separation is measured from the discharge piping to the
Answer:
Food level rim Question 18: With the exception of a drinking fountain an airgap separation must never be less than _____ inches
Answer:
- inch
Question 19: The minimum check valve closing differential Pressure of a pressure type vacuum breaker assembly is
Answer:
- psig
Question 20: The maximum hazard application of a double valve assembly is
Answer:
Pollution
Question 21: Negative gauge Pressure may result from
Answer:
High usage
Question 22: For domestic flow the maximum allowed pressure loss from an SVB is
Answer:
10 psi Question 23: The number 1 test cock of a pressure type vacuum breaker assembly is located at the
Answer:
Outlet of shut off valve number 1 Question 24: The critical installation level for a water closet ball cock is _______ inches
Answer:
- inch
Question 25: When a backflow preventer is installed near a meter it is recommended that the plumbing system contain a
Answer:
Expansion tank
Question 26: Water pressure booster pumps are typically located at
Answer:
Tall buildings
Question 27: A barometric loop protects the potable water supply from
Answer:
Backsiphonage Question 28: Drinking Water Standards in the United States were first established by the
Answer:
Public Health Service
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