cross connection practice exam questions and answers 2024

cross connection practice exam questions and answers 2024 The Check Valves of a Double Check Valve Assembly must be: Internally Loaded Which of the following backflow preventers offers effective protection under backsiphonage conditions only and can also be subjected to constant full line pressure? Spill Resistant Type Pressure Vacuum Breaker To appropriately resolve a cross connection contamination incident, a qualified tester or specialist should: Identify and isolate the source of contamination, Identify and isolate the affective area. Notify the customer, as well as, the health department Which of the choices is best described as "a flow of water or other liquids back into the potable water supply due to a negative or reduced pressure in the supply piping?" Backsiphonage A residential "partial flow through" type fire sprinkler/ standpipe system is designed to circulate water in what portion(s) of the water system? Sprinkler system main The factory loaded spring tensions of the first and second check valves found in a Reduced Pressure Principle Backflow Assembly are always Pre loaded different from one another An Approved Air Gap must be: Twice the pipe diameter with a minimum of 1 inch separation Upon completing test number one of a Double Check Valve Assembly, when using a differential pressure gauge, in what position are the shut off valves for the next test? Shutoff valve #1 is open and shutoff valve #2 is closed According to the AWWA Canadian CCC manual, the minimum vertical distance from the bottom of a RP's relief valve to the finished floor level should be? 300 mm (12") The Dual Check Valve can be used to isolate which one of the following applications? Residential potable water systems with a minor degree of hazard During the field test of a Reduced Pressure Principle Backflow Assembly, it may be possible to compensate for a leaking number two shutoff valve by attaching a temporary bypass hose from: Test cock number one to test cock number four Backflow prevention assemblies shall be field tested to a minimum of: Annually To what maximum centerline height (from the finished floor) must testable backflow preventers be installed before a fixed platform is to be provided below the assembly? 1500 mm (5') Which backflow preventer contains a float check, a check seat and an air inlet poppet? Atmospheric Vacuum Breaker What (if any) is the backflow concern for a bakery which aspirates food additives into a vessel in a preparation area? The substance may deteriorate and become a health concern The Pressure Vacuum Breaker Assembly may be used for backflow protection for which of the following conditions? Backsiphonage; severe hazard How many test cocks are there on a Spill Resistant Type Pressure Vacuum Breaker Assembly? One When field testing a Pressure Vacuum Breaker Assembly installed close to a ceiling, the gauge should: Be placed at the same level as the assembly During the first test of a Double Check Valve Assembly, it is found that water continually runs from open test cock #3. The bleed off valve arrangement is opened and after a moment the water stops running out of the open bleed off valve arrangement, but continues to flow from test cock #3. What is the most probable problem? Shutoff valve #2 and check valve #2 are leaking with backpressure The spring in the relief valve of a Reduced Pressure Principle Backflow Assembly is designed to: Open the relief valve When non-toxic antifreeze chemicals are added to a fire suppression system, which of the following is required to protect the potable water supply? Reduced Pressure Principle Backflow Assembly The accuracy of differential test gauges used for field testing should be checked: On a annual basis A certified backflow assembly tester, is required to report backflow prevention field test information to the: Administrative authority An appropriately installed and working Atmospheric Vacuum Breaker, under a backsiphonage condition, will cause the relief valve to: Fall in the open position Undersized water service and distribution piping carrying water at high velocities: May cause backsiphonage due to the aspirator effect When testing a Pressure Vacuum Breaker Assembly, what must be done after the air inlet opening point value has been obtained? Drain water from the assembly Water continually flows from the open test cock #2, during the test of the check valve on a Pressure Vacuum Breaker Assembly which has been installed to requirements, this is an indication of a/an: Leaking #1 shutoff valve What may be installed immediately upstream of a backflow prevention assembly to protect the assembly from foreign particles? A strainer with blow out tapping A Lab Faucet Vacuum Breaker is effective protection against: Backsiphonage Edible syrup, in a cannery, was pressurized into a drinking water line through a direct cross connection could have been prevented by the installation of a: Reduced Pressure Principle Backflow Assembly The type(s) of backflow are Backpressure and Backsiphonage Which of the following is part of a Cross Connection Control program? Annual testing of backflow assemblies Which component of a Pressure Vacuum Breaker assembly must be field tested first? The air inlet valve A field test being performed on a Double Check Valve Assembly using a differential pressure gauge. Water continuously flows from the open test cock #3. What could be the problem? Shutoff valve #1 is leaking A differential pressure gauge is used to field test: Reduced Pressure Principle Backflow Assembly Which of the following will provide the highest degree of backflow protection? Approved Air Gap Which of the following backflow prevention device(s) contains two force biased, soft seated check valves? Dual Check Valve A water main break will most likely cause what type of condition? Backsiphonage Which of the following instruments is used in the field testing of Double Check Valve Assemblies? Differential Pressure Gauge What is the recommended premise isolation for a dockside facility with internal protection at the fixture? Double Check Valve Assembly When restoring water service to the customer, after testing a Double Check Valve Assembly, how are the shut off valve(s) properly opened? Slowly open number two shut off valve If the high side bleed needle valve is left open during a field test of the check valve on a Pressure Vacuum Breaker Assembly, which of the following conditions will occur Reduce the pressure between the check valve and the #1 shut off valve The Air Gap funnel drain for the relief valve of a Reduced Pressure Principle Backflow Assembly: May not be sufficient to handle the full relief valve discharge A contaminated auxiliary water supply is utilized to maintain a fire sprinkler system at an elevated pressure. To protect the potable water supply, what is the appropriate backflow preventer on the water service pipe? Reduced Pressure Principle Backflow Assembly A test is being performed on the check valve of a Pressure Vacuum Breaker Assembly, it is noticed that shut off valve #1 is leaking. What should the tester do? Divert water through a bleed valve connected at test cock #1 Internal Protection will: Protect the personnel within the building When entering a vault containing a backflow prevention assembly the tester should: Check the quality of the atmosphere prior to entry Lye is backsiphoned from an open vat (without a cover on the top) in the production of concrete by a direct cross connection. This would constitute a: Severe Health Hazard During a field test of a Pressure Vacuum Breaker Assembly, the air inlet valve must open: At or above one psid When repairing a Double Check Valve Assembly, the tester should NOT: Modify internal components A Pressure Vacuum Breaker Assembly may be installed with a/an ____________ downstream of the assembly. Shut off valve Adequate support blocks are required for backflow prevention assemblies over _____ inch in size. 2 Backflow in a public water supply can be caused by: Backpressure and Backsiphonage What type of backflow preventer is recommended for premise isolation on a food processing plant? Reduced Pressure Principle Backflow Assembly The primary concern to the water purveyor, when an auxiliary water supply is utilized, or maintained, is to ensure that: Backflow protection is provided at the water service connection The relief valve of a Reduced Pressure Principle Backflow assembly discharges in a static or no flow condition and stops discharging during a flow condition. The most likely cause is Fouled number one check valve An absolute pressure of 25 psia, at sea level, is equal to approximately what gauge pressure? 10 psig