Download Backflow Prevention Practice Exam and more Exams Company Secretarial Practice in PDF only on Docsity!
Backflow Prevention Practice Exam
- Containing a plumbing system from the public water supply requires back- flow protection at the? A. Appliance or fixture B. Building foundation C. Irrigation system D. Service Connection E. Sprinkler riser: Service Connection
- Backflow preventer manufacturers recommend that assemblies be field-tested annually and when? A. Installed B. Moved C. Repaired or Installed D. Shut down
E. Water suppliers provide notice: Repaired or Installed
- A differential pressure gauge reading of 0.2 psid is represented on water column sight tube by? A. 1/16 in. (0.16 cm) B. 1/2 in. (1.3 cm) C. 2 in. (5.1 cm) D. 3.5 in. (8.9 cm) E. 5.5 in. (14 cm): 5.5 in. (14 cm)
- 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: Aesthetically bad
D. Railroad and highway intersection sign E. Temporary hose bibb connection: 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: 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: 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: 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: Death
- To prevent backflow, an atmospheric vacuum breaker is primarily designed to?
D. Utility storage tanks E. Water service connections: 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: 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): 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: 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: 12
- A submerged atmospheric vacuum breaker may be considered a(n)?
C. Submerged inlet D. Toxic substance E. Valve: 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: 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: Water pressure
- Pressure vacuum breaker shut-off valves and test cocks will avoid freeze damage if winterized by? A. Leaving all valves fully open B. Rotating ball valve handles to 45 degree angle C. Purging the body with compressed air D. Removing the assembly's internal components E. Removing shut-off valve and test cock operators: Rotating ball valve handles to a 45 degree angle
- A supply pressure loss with a functional check valve will cause a pressure vacuum breaker to? A. Admit air into the downstream piping B. Be subject to backpressure C. Discharge water D. Fail
- A pressure vacuum breaker may have on the assembly's discharge piping. A. Auxiliary water supply looped irrigation B. A boiler C. A booster pump D. Elevated piping E. Irrigation sprinkler heads: Irrigation sprinkler heads
- 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): 1 psi (6.89 kPa)
- The recorded value of a pressure vacuum breaker check valve is
deter- mined 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: 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: Tightly closed
- An indication that a pressure vacuum breaker is undersized for its appli- cation is? A. Air-inlet valve leakage
D. A leaking check valve E. A leaking or damaged shut-off valve 1: 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: 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: 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: Trapped air
- A low-hazard use only backflow preventer is a(n)? A. Air-gap separation B. Atmospheric vacuum breaker C. Double check valve assembly D. Pressure vacuum breaker assembly E. Reduced pressure principle assembly: Double check valve assembly
- Double check detector assembly flow indicators must register flow up
B. Date of manufacture C. Serial number D. Working pressure (maximum) E. Working temperature (maximum): Serial number
- Double check valve assembly components must be? A. Bronze B. Independently acting C. Plastic D. Rubber E. Spring activated: Independently acting
- After the repair of a double check valve assembly, a field test is required for the? A. Check valve number 1 B. Component repaired C. Entire assembly
D. Tester's personal records only E. Shut-off valve tightness: 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: 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
