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BACKFLOW PREVENTION ASSEMBLY
TESTER EXAM NEWEST 2024 ACTUAL
EXAM COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A
Pollution of a public water supply suggests the substance in the water is ____? A. Aesthetically bad B. Biological with virus only C. Lowering the pH below 1. D. Radiological E. Toxic Correct Answer Aesthetically bad Backsiphonage may occur when the pressure inside copper tubing is ____? A. Greater than atmospheric pressure B. Greater than barometric pressure C. Greater than 0 gauge pressure D. Less than absolute pressure E. Less than atmospheric pressure Correct Answer Less than atmospheric pressure A cross-connection may be a permanent piping arrangement or a(n) ____? A. Backflow preventer B. Church symbol C. OSHA hazardous area designation D. Railroad and highway intersection sign
E. Temporary hose bibb connection Correct Answer Temporary hose bibb connection The isolation of a plumbing water system hazard requires____? A. Appliance protection B. Building quarantine C. High-hazard protection D. Meter protection E. Toxin monitoring Correct Answer Appliance protection A direct cross-connection suggests the piping system may be subjected to ____? A. Backpressure or backsiphonage B. Backsiphonage only C. Periodic inspection D. Sustained pressure E. Toxic materials Correct Answer Backpressure or backsiphonage A pipe restriction's flow velocity increase may allow ____? A. Aspiration B. Backpressure C. Low turbulence D. Pressure head E. Pressure surges Correct Answer Aspiration Water supply contamination from backflow may result in ____? A. A bad taste B. Coloration C. Death D. Odor or smell E. Pipe wall mineral deposit flaking Correct Answer Death To prevent backflow, an atmospheric vacuum breaker is primarily designed to ____?
C. Plumbing fixtures or appliances D. Utility storage tanks E. Water service connections Correct Answer Plumbing fixtures or appliances The mechanical component of an atmospheric vacuum breaker serves as an air-inlet valve and a ____? A. Check valve B. Regulating valve C. Relief valve D. Shut-off valve E. Test port Correct Answer Check valve A deck-mounted atmospheric vacuum breaker's critical installation level is above the outlet usage by ___? A. 1 in. (2.5 cm) B. 3 in. (7.6 cm) C. 6 in. (15 cm) D. 12 in. (30 cm) E. 18 in. (46 cm) Correct Answer 1 in. (2.5 cm) A hose-bibb connection is required to have a permanently installed ____? A. Atmospheric vacuum breaker B. Backflow preventer C. Pressure vacuum breaker D. Shut-off valve E. Spill-resistant vacuum breaker Correct Answer Atmospheric vacuum breaker Atmospheric vacuum breakers must not be subject to continuous water pressure for more than ___ hr. A. 3 B. 6 C. 12
D. 18
E. 24 Correct Answer 12 A submerged atmospheric vacuum breaker may be considered a(n) _____? A. Backflow preventer B. Cross-connection C. Expensive elbow D. Typical installation E. Useful training photo Correct Answer. Cross-connection Flow from the outlet of an atmospheric vacuum breaker must not reach a _____? A. Closed tank B. Section of straight tubing C. Submerged inlet D. Toxic substance E. Valve Correct Answer Valve An atmospheric vacuum breaker is not required to have a(n) _____? A. Annual field test B. Installation elevation C. Installation inspection D. Label E. Usage limitaion Correct Answer Annual field test The air-inlet valve of an atmospheric vacuum breaker is help closed by____? A. Atmospheric pressure B. Cotter pins C. Gravity D. Spring tension E. Water pressure Correct Answer Water pressure
The minimum loading to open a pressure vacuum breaker's air- inlet valve is ____? A. 1 psi (6.89 kPa) B. 2 psi (13.8 kPa) C. 3 psi (20.7 kPa) D. 4 psi (27.6 kPa) E. 5psi (34.5 kPa) Correct Answer 1 psi (6.89 kPa) The recorded value of a pressure vacuum breaker check valve is determined when ____? A. Both shut-off valves are closed B. The high-bleed valve is opened C. The air-inlet valve opens D. Water stops flowing from test cock 1 E. Water stops flowing from test cock 2 Correct Answer Water stops flowing from test cock 2 Pressure vacuum breaker shut-off valves must be _____ valves. A. Angle B. Gate C. Globe D. Regulating E. Tightly closed Correct Answer Tightly closed An indication that a pressure vacuum breaker is undersized for its application is _____? A. Air-inlet valve leakage B. Bonnet distortion C. Chatter or noise during flow D. Disc pitting E. Spring elongation Correct Answer Chatter or noise during flow Continuous flow from a pressure vacuum breaker's test cock 2 with shut-off valve 2 open and shut-off valve 1 closed is an indication of _____?
A. Backpressure backflow B. Backsiphonage backflow C. A failed air-inlet valve D. A leaking check valve E. A leaking or damaged shut-off valve 1 Correct Answer Backpressure backflow Pressure vacuum breakers may be used on the following applications except ____? A. High hazard/backsiphonage B. High hazard/continuous pressure C. Low hazard/backpressure D. Low hazard/backsiphonage E. Low hazard/intermittent pressure Correct Answer Low hazard/backpressure A double check valve assembly is installed 12 in. (30.5 cm) above the floor for _____? A. Electrical code compliance B. Floor draining C. Maintenance D. Mechanical code compliance E. Rodent control Correct Answer Maintenance Double check valve assembly product performance standards require venting for _____? A. Chemicals B. Test cock corrosion C. Trapped air D. Vertical installations E. Winterization Correct Answer Trapped air A low-hazard use only backflow preventer is a(n) _____? A. Air-gap separation B. Atmospheric vacuum breaker
E. Shut-off valve tightness Correct Answer Entire assembly Prior to testing the check valves in the direction of flow on a double check valve assembly using a high and low side on the gauge, a tester must first ____? A. Determine the tightness of shut-off valve number 2 B. Notify the owner of the water shut-off C. Record the water supply line pressure D. Submit the test report to the water supply E. Test check valve number 2 with backpressure Correct Answer Determine the tightness of shut-off valve number 2 A double check valve assembly installed in a vertical flow down orientation is only allowed ______? A. In a basement or vault B. If the assembly was tested and approved as such C. If the check weight does not compress the spring D. On fire-suppression systems E. On water supply service connections Correct Answer If the assembly was tested and approved as such A check valve field test reported value of 0.8 psid (5.5 kPa) suggests _____? A. A passing check valve B. A broken or failed spring C. Debris in the check seat D. Disc softening or decay E. Low water pressure Correct Answer Disc softening or decay A reduced pressure principle assembly's relief valve is loaded to _____? A. Push the valve away from its seat B. Push the valve on to its seat C. Remain closed with any zone pressure D. Remain open with any supply pressure
E. Sustain all water hammer conditions Correct Answer Push the valve away from its seat The purpose of the reduced pressure principle assembly check valve number 1 loading is to _____? A. Create a pressure head increase B. Create a reduction in water pressure C. Provide water pressure to the relief valve diaphragm D. Reduce system pressure to the plumbing code limit E. Sustain the assembly's buffer Correct Answer Create a reduction in water pressure Intermittent relief valve discharge from a reduced pressure principle assembly is probably caused by _____? A. A fouled check valve number 1 B. A fouled check valve number 2 C. A fouled relief valve D. A partially closed shut-off valve number 2 E. Water hammer or hydraulic shock Correct Answer Water hammer or hydraulic shock Backpressure to a reduced pressure principle assembly fouled check valve number 2 will likely _____? A. Dissipate through the air-vent B. Force the relief valve to open and discharge C. Have no visible effect D. Push the check valve closed E. Remain in the system Correct Answer Force the relief valve to open and discharge An air-gap separation must be maintained at a reduced pressure principle assembly's _____? A. Build drain B. Domestic Supply C. Indirect drain outlet
The reduced pressure principle assembly's number 2 check valve is loaded to close the valve with a minimum differential pressure of _____? A. 1 psid (6.9 kPa) B. 2 psid (13.9 kPa) C. 3 psid (20.7 kPa) D. 4 psid (27.6 kPa) E. 5 psid (34.5 kPa) Correct Answer 1 psid (6.9 kPa) If a reduced pressure principle assembly's field test shows a leaking shut-off valve 2, the leak may be compensated by obtaining water pressure/flow from ____? A. A high-pressure gauge control valve B. A low-pressure gauge control valve C. Test cock number 1 D. Test cock number 2 E. Test cock number 3 Correct Answer Test cock number 1 An air-gap separation will tend to _____? A. Admit air into the system to break a siphon B. Allow air to backpressure instead of liquid C. Dissipate chlorine residual D. Generate a whistle to warn of a siphon E. Provide code compliance Correct Answer Admit air into the system to break a siphon Technically, the air-gap separation dimension is determined from the ____? A. Discharge pipe's outer diameter B. Effective opening C. Fixture inlet diameter D. Supply pipe diameter E. Service connection size Correct Answer Effective opening
When a piping discharge is near a wall, the air-gap separation must be increased an additional ____ pipe diameter(s). A. 1 B. 2 C. 3 D. 4 E. 5 Correct Answer 1 An air-gap separation's hazard classification is _____? A. High hazard/backsiphonage B. High hazard/backpressure C. Low hazard/backsiphonage D. Low hazard/backpressure E. High or low hazard/backsiphonage only Correct Answer High or low hazard/backsiphonage only With the exception of a drinking fountain, the minimum air-gap separation is _____? A. 0.5 in. (1.3 cm) B. 1.0 in. (2.5 cm) C. 1.5 in. (3.8 cm) D. 2.0 in. (5.1 cm) E. 3.0 in. (7.6 cm) Correct Answer 1.0 in. (2.5 cm) Water discharged through an air gap to an open tank surface has a pressure of ____? A. 0 psi absolute B. 0 psi atmospheric C. 0 psi gauge D. Static line pressure E. Vapor pressure Correct Answer 0 psi atmospheric Air-gap separations must be ____? A. Classified B. Inspected annually
A swing connection is a type of _____? A. Backflow preventer B. Cross-connection C. Detector assembly D. Gauge component E. Shut-off valve repair tool Correct Answer Cross-connection A barometric loop must be installed 35 ft (10.7 m) above the highest ____? A. Boiler B. Fixture outlet C. Gate valve D. Service connection E. Water meter Correct Answer Fixture outlet A spool is used to connect a ____? A. Copper and ductile iron pipe B. Copper and PVC pipe C. Disc retainer and valve guide D. Potable and non-potable system E. Test cock Correct Answer Potable and non-potable system A fire sprinkler system's backflow protection for a black-iron pipe system is typically ____? A. An air-gap separation B. A double check valve assembly C. A reduced pressure principle assembly D. A reduced pressure detector assembly E. No protection required Correct Answer A double check valve assembly The dual check with an intermediate vent is used primarily for ____? A. Commercial boilers B. Industrial process water piping
C. Hose bibbs D. Low-pressure residential boilers E. Swimming pool chlorinators Correct Answer Low-pressure residential boilers A hose connection vacuum breaker's maintenance includes _____? A. Check disc replacement B. Diaphragm replacement C. Draining for winterization D. Replacement every 2 years E. Water flushing Correct Answer Draining for winterization Pressure loss per foot of elevation rise is ____? A. 0.43 psi (2.99 kPa) B. 0.50 psi (3.45 kPa) C. 1.0 psi (6.89 kPa) D. 2.0 psi (13.9 kPa) E. 2.3 psi (15.9 kPa) Correct Answer 0.43 psi (2.99 kPa) When the water velocity increases, the ____? A. Atomospheric pressure decreases B. Gauge pressure decreases C. Gauge pressure increases D. Head loss does not change E. Water temperature lowers Correct Answer Gauge pressure decreases An indirect cross-connection suggests the system may be subject to ____? A. An air gap separation B. Backpressure C. Backsiphonage only D. A meniscus E. A Venturi Correct Answer Backsiphonage only
E. Reduced pressure principle assembly Correct Answer Reduced pressure principle assembly While obtaining a reduced pressure principle assembly's relief valve opening point using a high and low-pressure hose, turning the gauge valve more than 1/4 turn indicates a leaking _____? A. Check valve B. Gauge Valve C. Relief valve D. Shut-off valve E. Test cock Correct Answer Shut-off valve A reduced pressure principle assembly check valve number 1 is field-tested _____? A. In the direction of flow only B. Under backpressure C. Under backsiphonage D. Under backpressure and the direction of flow E. Under backpressure and backsiphonage Correct Answer In the direction of flow only A thrust block is designed to ____? A. Adjust pressure changes B. Maintain pipe joint integrity C. Stop backflow D. Stop water hammer E. Support failing soil conditions Correct Answer Maintain pipe joint integrity Water hauling truck fill stations should have either an air-gap separation or a(n) _____? A. Atmospheric vacuum breaker B. Double check valve assembly C. Dual check valve D. Pressure vacuum breaker assembly
E. Reduced pressure principle assembly Correct Answer Reduced pressure principle assembly When testing a reduced pressure principle assembly using three hoses, a difference between the apparent and actual reading is likely due to _____? A. Backflow B. Check valve failure C. Disc compression D. A leaking shut-off valve E. Opening of the bypass control valve Correct Answer A leaking shut-off valve The plumbing code requires that a spill-resistant vacuum breaker be installed above the highest use by at least _____? A. 3 in. (7.6 cm) B. 6 in. (15 cm) C. 9 in. (23 cm) D. 12 in (30 cm) E. 18 in. (46 cm) Correct Answer 12 in (30 cm) Modifications of any kind to a backflow preventer will _____? A. Alter its head loss B. Render it inoperable C. Require a tester failure D. Validate its warranty E. Void its approval Correct Answer Void its approval A water system pressure of 10 psi (69 kPa) and a plumbing system pressure of 20 psi (138 kPa) may be described as _____? A. Backpressure B. Backsiphonage C. Gauge pressure differential D. inflow/infiltration E. Static condition Correct Answer Backpressure
