ASSE Backflow Recertification Practice Exam

These questions are part of the practice quiz. Start practicing

• A pressure of 75 psi is equivalent to how many feet of water head?
• What does RPZ stand for in the context of backflow prevention?
• What is the main purpose of a vacuum breaker?
• How high can atmospheric pressure at sea level support a column of water?
• An atmospheric pressure vacuum breaker shall not be subjected to water pressure for more than how many hours?
• Where is test cock number one located on an approved double check valve assembly?
• What should be regularly tested to ensure the effectiveness of backflow prevention?
• How many times the effective opening of the water supply outlet piping must the vertical distance of an air gap separation be?
• What risk arises when a hydronic system is directly connected to a domestic water system without proper backflow protection?
• Which of the following pieces of information is NOT required on a Backflow report?
• What maintenance action is essential for ensuring the reliability of a backflow assembly?
• What safety feature is crucial in preventing backflow in systems with potentially hazardous potable water?
• If the relief valve of a Reduced Pressure Zone (RPZ) assembly fails to open during a field test, what is the probable cause?
• A double check backflow device should not be used to protect against which of the following?
• What type of backflow device is required for the main water supply to a waste management plant?
• What type of environment would require a high hazard backflow prevention device?
• What is defined as dynamic pressure in a fluid system?
• What is the critical component of an atmospheric type vacuum breaker that is subject to failure?
• Which component is NOT part of a double check assembly?
• Which type of backflow assembly is primarily used in commercial applications?
• What action must be taken if a backflow test indicates the assembly is failing?
• What is the initial step to take when installing a backflow prevention device?
• Which type of protection is associated with air gap separation?
• What are the minimum scale increments allowed on a differential pressure gauge used for testing backflow assemblies?
• What should be done if the differential pressure relief valve does not open as required?
• What is a probable cause for a relief valve failing to open during a field test of an RPZ?
• A leaking check valve may be caused by which of the following?
• What safety measure should be followed during Backflow testing?
• Which factor can significantly affect the performance of a backflow prevention assembly?
• Which component is present in a hose connection to provide high hazard protection?
• Which of the following will not create a closed loop piping system?
• Which component is essential for testing backflow prevention devices and assemblies?
• What is the correct procedure to begin testing a Reduced Pressure Zone (RPZ) device?
• True or False: The vent hose on a differential test kit is used to bypass the Backflow device so water service is uninterrupted during testing.
• What is the most common Backflow prevention device installed at a residential meter?
• What determines the degree of hazard for a non-potable water source?
• The relief valve of an RPZ must open at what pressure?
• What absolute pressure could cause backsiphonage to occur in a hydraulic system at sea level?
• What is a common sign of malfunction in a backflow prevention assembly?
• What is the function of test cocks in backflow prevention assemblies?
• Are atmospheric type vacuum breakers and pressure vacuum breaker assemblies effective for protection against backpressure?
• What is the suggested minimum vertical distance between the relief valve discharge port of a RPZ and the surrounding floor or grade?
• Which component is measured during a directional flow test on an RPZ assembly?
• What is the intended use of a laboratory faucet backflow device?
• Which testing method is used to ensure the functionality of a RPZ?
• Continuous leakage from test cock #2 during a test of a pressure vacuum breaker is likely due to what issue?
• Which test is critical to ensuring that a backflow prevention assembly is operational?
• A double check valve assembly consists of how many check valves and shutoff valves?
• What is a key factor in determining the appropriate type of backflow prevention device to install?
• Which of the following is NOT a reason for backflow prevention failure?
• A double check backflow prevention assembly contains which component?
• What is the primary role of a check valve in backflow prevention?
• An air gap, affected by two interesting walls, must be how many times the effective opening of the potable water outlet?
• What does the acronym RPZ stand for in backflow prevention?
• Why is it important to flush test cocks in the correct sequence?
• When testing a double check valve assembly, which shutoff valve should be closed first?
• What term can also be used to describe sub-atmospheric pressure?
• What information is required to properly identify the backflow assembly to be tested?
• Which valve must be closed when testing a Reduced Pressure Zone (RPZ) assembly?
• How much pressure is exerted at the base of a column of water that is two feet tall?
• What is defined as the force exerted by a fluid at rest?
• Which test cocks must be open to test the differential pressure drop across check valve number one on a double check?
• What must be done with the original signed and tested date test report?
• What is the primary difference between a double check valve and a reduced pressure zone device?
• An occasional discharge from the relief valve of a RPZ indicates what?
• If the check valve springs are interchanged on a double check valve, how will the assembly be affected?
• Which of the following is NOT necessary for testing a double check valve?
• For what purpose are thermal expansion tanks used?
• What type of protection is required for a closed loop heating system containing chemicals?
• Test cock #1 on a 2" and smaller pressure vacuum breaker is located between the check valve and the:
• True or False: Supply pressure fluctuations may cause the relief valve of an RPZ to open on occasion.
• What is the purpose of the air gap in backflow prevention?
• Which of the following is not a method used for Backflow prevention?
• How often do USC, AWWA, and manufacturers recommend inspecting backflow prevention assemblies?
• Which instrument can be used to test a double check Backflow prevention device?
• What is the main purpose of a reduced pressure zone (RPZ) backflow preventer?
• What type of backflow protection is required for a chemically charged solar heating system with an expansion tank?
• What is the maximum allowable pressure loss during rated flow across a double check?
• What is the primary purpose of pressure relief valves in backflow prevention assemblies?
• What is an acceptable means of backflow prevention?
• The function of a double check valve is primarily to prevent what?
• Before which point must the air inlet of a pressure vacuum breaker open according to pressure gauges?
• Why is an air gap important in backflow prevention?
• Which condition could result in water contamination through cross connection?
• What component of a backflow prevention device typically serves a relief function in a RPZ?
• What is the required backflow protection for a solar heating system that is chemically charged and includes an expansion tank?
• What type of pressure is indicated during a flow test on a check valve?
• What is the minimum reading required when performing a directional flow test on the #2 check valve of a RPZ?
• A high hazard classification includes which of the following?
• If the check valve springs are interchangeable on a double check assembly, what impact does this have?
• Why is proper installation of backflow prevention devices crucial?
• Can a double check backflow device be used on a system containing antifreeze?
• An atmospheric type vacuum breaker is primarily installed to protect against what?
• Which of the following materials is not considered a high hazard?
• The term "approved reduced pressure principle assembly" applies to what configuration?
• A differential pressure gauge is used to test which types of backflow assemblies?
• Which of the following is not considered a source of backpressure?
• What type of pressure is indicated by a pressure gauge at a specific depth in a water column?
• What does the term "backsiphonage" refer to?
• The portable water supply to a urinal equipped with a flushometer valve is protected by which type of backflow device?
• What is the role of a test cock in a backflow prevention assembly?
• What is the minimum type of containment protection required for a non-health hazard, non-chemical sprinkler?
• A dual check valve is used to protect against which hazards?
• Which of the following can lead to backpressure conditions?
• What is the required type of protection between a potable water system and a building sewer?
• What is required protection for a closed loop system containing glycol?
• What is an example of a potential backpressure plumbing connection?
• What is the required backflow protection for a fire sprinkler system containing chemicals?
• What typically causes intermittent or spitting discharges from the relief valve during a no flow condition?
• High velocities in undersized water piping may cause what issue?
• Which of the following is an advantage of using an air gap?
• The application of a pressure vacuum breaker is for:
• Which device/assembly cannot sustain continuous pressure downstream?
• What is the most desirable location to install a Backflow?
• Where is an atmospheric type vacuum breaker most likely installed?
• What would a gauge installed at the bottom of a 10-foot deep open water tank indicate in terms of pressure?
• What does constant discharge from the relief valve of a reduced pressure principle assembly usually indicate?
• A pressure of 75 psi is equivalent to how many feet of head pressure?
• How many feet of water can a perfect vacuum at sea level theoretically raise in a pipe?
• A double check valve assembly that shows equal pressure between the check's inlet and outlet indicates what condition?
• What is the primary operational concern of a backflow prevention device?
• How is an air gap separation measured?
• In backflow prevention, what does "backsiphonage" refer to?
• On an approved pressure vacuum breaker assembly, where are the shut off valves located?
• An increase of pressure in a closed system due to heat and expanding of water is known as:
• In relation to backflow prevention, what does RPZ stand for?
• A primary cause of reversal flow of water in a piping system is:
• The bypass line of a backflow must contain an approved assembly of equal what?
• How many test cocks are required on a 2 inch and smaller pressure vacuum breaker?
• A check valve in an approved backflow assembly must be tight when?
• What type of backflow prevention is required for a closed-loop system that contains antifreeze?
• What is an essential function of a backflow preventer?
• A Backflow test gauge (differential pressure gauge) should be stored with all needles:
• What is characterized as backpressure?
• An indirect cross connection allows what type of backflow to occur?
• What component is crucial for the operation of a pressure vacuum breaker?
• When testing a differential pressure gauge, where is water pressure bled through?
• What type of hazard does RPZ protect against?
• One atmosphere of pressure is equivalent to how high of a column of water at sea level?
• What is the primary purpose of a pressure vacuum breaker assembly?
• When is it necessary to utilize a reduced pressure zone (RPZ) assembly?
• Which test cock number should be opened to establish flow through a backflow preventer?
• During a field test, where is the vent screw located in relation to a Pressure Vacuum Breaker Assembly check valve?
• What is the primary consideration in determining what type of backflow prevention to install?
• What is the critical final step in testing a backflow prevention assembly?
• Which description best fits Dual Check Backflows (ASSE 1024)?
• What does the spring in the relief valve assembly of an RPZ do?
• Where is the reduced pressure zone located in a reduced pressure principle backflow preventer device?
• A system that includes a chemical injector must have what type of protection for the potable system?
• What is the main purpose of testing Backflow prevention devices?
• What indicates a failure in a check valve during testing?
• What minimum markings are required on a backflow prevention assembly?
• Which of the following is a key maintenance practice for backflow prevention devices?
• Which part is not required for an atmospheric type vacuum breaker?
• What is one common reason for backflow to occur in a water system?
• When a facility requires continuous and uninterrupted water pressure, what is the recommended setup for Backflow assemblies?
• Which type of backflow prevention device is required for a chemically treated boiler system on the potable water system?
• How many standard test cocks are present in a typical double check valve assembly?
• What does "Containment" protection imply in a backflow prevention context?
• Before installing a reduced pressure zone (RPZ) device, what special consideration should be noted?
• What is the primary purpose of a backflow prevention device?
• The differential pressure relief valve on a Reduced Pressure Zone (RPZ) assembly must open before the differential pressure across the inlet drops below what value?
• What should be done if a test cock is found to be plugged?
• What is the formula for calculating absolute pressure at sea level?
• What does constant discharge from the relief valve of a Reduced Pressure Principle assembly usually indicate?
• What is the minimum protection required for containment protection in a non-health hazard situation?
• What is the required number of test cocks on a small (3/4"-2") pressure vacuum breaker?
• In order to maintain water service during Backflow testing, what must be ensured?
• In facilities using a contaminated auxiliary water supply for fire protection, what is required for the potable water service connection?
• In the context of backflow prevention, what defines a check valve's function?
• Which component helps to keep a check valve operational?
• What is the primary purpose of a backflow preventer?
• The following statement is true regarding atmospheric type vacuum breakers:
• What is the purpose of testing backflows annually?
• Which backflow prevention device is specifically designed to protect against backflow caused by back pressure?
• Which equipment is specifically used for testing a pressure vacuum breaker?
• Which of the following systems typically requires a backflow prevention device?
• Before attaching a test kit to a Reduced Pressure Zone (RPZ), why does the tester open test cock 4 and allow it to trickle?
• What feature primarily distinguishes a reduced pressure backflow preventer from other devices?
• What is an example of a device that provides backsiphonage protection?
• What classification would waste from a chemical plant typically fall into?
• When testing a spill resistant vacuum breaker, to which test cock should you attach the high hose?
• When performing a test on a RPZ, the #2 test cock should be:
• Which of the following is NOT a reason for installing test cocks?
• What is one of the key features of a double check valve assembly?
• What is the purpose of a reduction pressure zone (RPZ) assembly?
• What is the standard pressure exerted at one foot of water column?
• What causes a pressure vacuum breaker assembly to chatter during flow conditions?
• True or False: Contaminant devices should be installed at the service connection in high hazard facilities.
• In a backflow prevention assembly, what does the term "test cock" refer to?
• What is the minimum hose diameter required for a pressure gauge used in backflow testing?
• What is the approximate gauge pressure (PSIG) equivalent to an absolute pressure of 25 psia?
• What could a significant risk to a potable water supply system from improper backflow prevention installations lead to?
• What conditions might necessitate the installation of a backflow preventer?
• A ___ would be least likely to require a RPZ to be installed as contaminant protection?
• Which device is commonly used to control thermal expansion problems?
• A pressure gauge reading of 50 psi can indicate a column of water is approximately how many feet high?
• A double check valve protects the potable water supply from what type of hazard?