WUS 065 AVB Under Normal Flow Conditions Quiz Part 1
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Questions and Answers

What is the function of the float-check in the AVB under normal flow conditions?

  • Prevent water from flowing through the assembly
  • Shut off the upstream shutoff valves
  • Regulate the water flow rate
  • Act as a check valve and an air-inlet valve (correct)

    • Where does the float-check seal off the port during normal flow in the AVB?

  • Overflow port
  • Water-inlet port
  • Check valve port
  • Air-inlet port (correct)

    • What happens to the float-check as water flows through the AVB under normal conditions?

  • Floats up to the air-inlet port and seals it off (correct)
  • Acts as a flow regulator
  • Opens the upstream shutoff valves
  • Sinks to the bottom of the assembly

    • What is the purpose of having shutoff valves located upstream of the AVB assembly?

    <p>To control and stop the flow of water to the AVB</p> Signup and view all the answers

    What does the float-check act as in the AVB under normal flow conditions?

    <p>Check valve and air-inlet valve</p> Signup and view all the answers

    Where does the float-check seal off the port during normal flow in the AVB?

    <p>Air-inlet port</p> Signup and view all the answers

    What is the purpose of having shutoff valves located upstream of the AVB assembly?

    <p>To isolate the AVB for maintenance</p> Signup and view all the answers

    What is the function of an Atmospheric Vacuum Breaker (AVB) under normal flow conditions?

    <p>Prevent backflow and allow air into the system</p> Signup and view all the answers

    What is the function of the float-check in the AVB under backsiphonage conditions?

    <p>It falls from the air inlet port, allowing air into the assembly and separating the downstream source from the upstream potable supply.</p> Signup and view all the answers

    What is the role of the float-check in preventing backsiphonage in an AVB?

    <p>It releases air into the assembly to break the vacuum and prevent backsiphonage.</p> Signup and view all the answers

    Why does the float-check fall to the seat of the assembly during backsiphonage in an AVB?

    <p>To release air into the assembly and prevent backsiphonage.</p> Signup and view all the answers

    What happens to the float-check in an AVB as water flows through it under normal conditions?

    <p>It allows air to enter the assembly and separate downstream source from the upstream potable supply.</p> Signup and view all the answers

    What is the purpose of the float-check in an Atmospheric Vacuum Breaker (AVB) under backsiphonage conditions?

    <p>To allow air into the assembly and separate the downstream source from the upstream potable supply</p> Signup and view all the answers

    What happens to the float-check in an AVB during backsiphonage?

    <p>It falls from the air inlet port allowing air into the assembly</p> Signup and view all the answers

    Where does the float-check seal off the port during normal flow in an AVB?

    <p>At the seat of the assembly</p> Signup and view all the answers

    What is the function of an Atmospheric Vacuum Breaker (AVB) under normal flow conditions?

    <p>To prevent backflow of non-potable water into the potable water supply</p> Signup and view all the answers

    What is the primary purpose of installing an AVB at least six inches above all downstream piping and outlets?

    <p>To prevent backpressure in the system</p> Signup and view all the answers

    Why is it important not to use shutoff or control valves downstream of the AVB?

    <p>To ensure proper functioning of the AVB</p> Signup and view all the answers

    What happens to the float-check in an AVB during backsiphonage?

    <p>It falls to the seat of the assembly</p> Signup and view all the answers

    What is the main use of an AVB in irrigation systems?

    <p>To prevent backpressure in the system</p> Signup and view all the answers

    What is the primary purpose of installing an AVB at least six inches above all downstream piping and outlets?

    <p>To prevent backpressure and protect against contamination</p> Signup and view all the answers

    Why is it important not to use shutoff or control valves downstream of the AVB?

    <p>To prevent interference with the operation of the AVB</p> Signup and view all the answers

    What is the main use of an AVB in irrigation systems?

    <p>Preventing contamination of the water supply</p> Signup and view all the answers

    What happens to the float-check in an AVB as water flows through it under normal conditions?

    <p>It remains open to allow for normal water flow</p> Signup and view all the answers

    What is the maximum continuous use or pressure duration allowed for an Atmospheric Vacuum Breaker (AVB) in a 24-hour period?

    <p>12 hours</p> Signup and view all the answers

    Why should there be no pumps downstream of the Atmospheric Vacuum Breaker (AVB)?

    <p>To prevent backpressure</p> Signup and view all the answers

    Under what conditions can the AVB and PVB be used with chemical addition systems?

    <p>When there are no pumps downstream</p> Signup and view all the answers

    What is the significance of installing an AVB at least six inches above all downstream piping and outlets?

    <p>To prevent backsiphonage</p> Signup and view all the answers

    What is the main reason for not using pumps downstream of the Atmospheric Vacuum Breaker (AVB)?

    <p>Pumps would create backpressure</p> Signup and view all the answers

    Why must the AVB not be subject to continuous use or pressure for a maximum of twelve hours out of any twenty four hour period?

    <p>To maintain the effectiveness of preventing backsiphonage</p> Signup and view all the answers

    Under what conditions can the AVB and PVB be used with chemical addition systems?

    <p>When there are no pumps downstream of the assemblies</p> Signup and view all the answers

    What is the significance of installing an AVB at least six inches above all downstream piping and outlets?

    <p>To ensure proper air gap for preventing backsiphonage</p> Signup and view all the answers

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