Backflow Quizzes Online & Trivia

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  • What is considered to be the critical level of a pressure vacuum breaker assembly if it not marked?
    What is considered to be the critical level of a pressure vacuum breaker assembly if it not marked?
    A valve is a mechanical implement that controls the flow of fluid and pressure within a system or process. A valve control system processes fluid flow, and pressure by performing any of the following functions: stopping and starting fluid flow, varying the amount of fluid flow, altering the amount of fluid flow, regulating downstream system or process pressure, and relieving component or piping overpressure. There are many valve designs and types that satisfy one or more of these functions. The bottom of the valve body is critical to the proper operation of the transmission.

  • What would you write on your report if you found a pressure vacuum breaker assembly installed on a boiler?
    What would you write on your report if you found a pressure vacuum breaker assembly installed on a boiler?
    A boiler is an essential but potentially dangerous equipment of everyday use. It needs to have the correct parts installed in order to make its use safe and constructive. However, at times, there are added parts that reduce the efficiency of the system. For instance, if there is a pressure breaker system installed on a boiler, you should know immediately that it is not where the pressure breaker assembly system should be installed. Instead, that should be taken off and a double backflow prevention assembly system should be installed in its place. This will ensure that the boiler work at its best.

  • What is the maximum height for a perfect vacuum (at sea level) to raise water in a pipe?
    What is the maximum height for a perfect vacuum (at sea level) to raise water in a pipe?
    The maximum hypothetical vacuum at sea level is 29.92 in-Hg, actual pump capabilities are based on and compared to this theoretical value. Depending upon pump design, the vacuum limit ranges from 28 to 29.5 in -Hg, or about 93% or 98% of the maximum abstract value. The vacuum level is determined by the pressure difference between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. The standard metric unit for a vacuum measurement is the millibar, or mbar. The higher up you are, the less volume you can attain. This is because free air is dense at higher altitudes, which has the effect of reducing the capacity and maximum vacuum levels.

  • What should you do if the air inlet valve of a pressure vaccum breaker should assembly will not seat?A. The air inlet valve should be wired closedB. Remove the check valveC....
    What should you do if the air inlet valve of a pressure vaccum breaker should assembly will not seat?A. The air inlet valve should be wired closedB. Remove the check valveC....
    INCREASE THE SUPPLY PRESSURE

  • What is an atmospheric vacuum breaker?
    What is an atmospheric vacuum breaker?
    33.9 foot column of water at sea level

  • What does the test, a maintenance report for a double check backflow prevention assembly include?
    What does the test, a maintenance report for a double check backflow prevention assembly include?
    DIFFERENTIAL PRESSURE RELIEF VALVE DISCHARGE

  • What is the probable cause of a relife valve failing to open during a field test on a reduced pressure principle backflow preventer?
    What is the probable cause of a relife valve failing to open during a field test on a reduced pressure principle backflow preventer?
    A MALFUNCTION OF THE RELIEF VALVE MECHANISM

  • What is the usual cause of an abnormal humming noice during the operation of backflow prevention assembly?
    What is the usual cause of an abnormal humming noice during the operation of backflow prevention assembly?
    THE SHUT-OFF VALVE IS NOT FULLY OPEN AND AIR IS TRAPPED IN THE DEVICE

  • What will you write-on your report? If you find a Pressure Vacuum Breaker Assembly installed on a boiler feed line.
    What will you write-on your report? If you find a Pressure Vacuum Breaker Assembly installed on a boiler feed line.
    Both a & b

  • When testing a Reduced Pressure Principle Backflow Preventer?
    When testing a Reduced Pressure Principle Backflow Preventer?
    The pressure differential relief valve is hydraulically dependent & mechanically independent

  • Why would a test cock not be flushed? 
    Why would a test cock not be flushed? 
    TO EQUALIZE PRESSURE ON BOTH SIDES OF THE CHECK VALVE

  • What is considered to be the critical level of a pressure vacuum breaker assembly if it is not marked?
    What is considered to be the critical level of a pressure vacuum breaker assembly if it is not marked?
    THE BOTTOM OF THE VALVE BODY

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