Backflow Quiz 5

100 Questions

Settings
Please wait...
Backflow Quizzes & Trivia

This purpose of this quiz is to check your knowledge of backflow.


Questions and Answers
  • 1. 
    Which of the following is a means of controlling thermal expansion? 
    • A. 

      T& P relief valve

    • B. 

      Water hammer arrestor

    • C. 

      Pressure regulator after the meter

    • D. 

      Thermal expansion tank

  • 2. 
    • A. 

      21'

    • B. 

      26'

    • C. 

      30'

    • D. 

      34'

  • 3. 
    During normal operation, the relief valve on a Reduced Pressure Principle Backflow Preventer remains closed due to 
    • A. 

      Supply side pressure

    • B. 

      Direct cross-connection

    • C. 

      Zone pressure

    • D. 

      Check valve #1

  • 4. 
    What type of cross connection is a submerged hose bibb (with no hose attached) ? 
    • A. 

      Actual

    • B. 

      Potential

    • C. 

      Permanent

    • D. 

      None listed

  • 5. 
    What protects the potable water supply to a urinal equipped with a flushometer valve? 
    • A. 

      Reduced Pressure Principle Backflow Assembly

    • B. 

      Double Check Backflow Prevention Assembly

    • C. 

      Atmospheric Type Vacuum Breaker

    • D. 

      Pressure Vacuum Breaker Assembly

  • 6. 
    • A. 

      Force the relief valve open

    • B. 

      Force the relief valve closed

    • C. 

      Force the relief valve closed

    • D. 

      Both b & c

  • 7. 
    Which of the following is used to control thermal expansion problems? 
    • A. 

      Soft seating check valves

    • B. 

      Pressure relief valves

    • C. 

      Expansion tank

    • D. 

      Both b & c

  • 8. 
    What is the suggested minimum distance between the relief valve discharge port of a Reduced Pressure Principle Backflow Preventer assembly and the flood level rim of the surrounding area? 
    • A. 

      6"

    • B. 

      12"

    • C. 

      18"

    • D. 

      24"

  • 9. 
    During a field test of a Reduced Pressure Principle Backflow Preventer, you find a leaking #2 check valve, you should make the repairs and 
    • A. 

      Retest #2 check valve

    • B. 

      Retest entire assembly

    • C. 

      Retest #1 check valve

    • D. 

      Approve without retesting

  • 10. 
    What is the required type of protection between a potable water system and the building sewer? 
    • A. 

      Double Check Backflow Prevention Assembly

    • B. 

      Pressure Vacuum Breaker Assembly

    • C. 

      Air gap separation

    • D. 

      Backwater valve

  • 11. 
    What is the maximum flow temperature for the hose bibb vacuum breaker? 
    • A. 

      120 degrees

    • B. 

      140 degrees

    • C. 

      160 degrees

    • D. 

      180 degrees

  • 12. 
    Which of the following is NOT a cause of backpressure? 
    • A. 

      Elevated plumbing

    • B. 

      Thermal expansion

    • C. 

      Pumps

    • D. 

      Aspiration

  • 13. 
    What is the purpose of testing the different pressures on a backflow assembly? 
    • A. 

      Check spring tension

    • B. 

      Make sure check is seated

    • C. 

      Record for test report

    • D. 

      All listed

  • 14. 
    • A. 

      0.5 psi

    • B. 

      1.0 psi

    • C. 

      2.0 psi

    • D. 

      3.0 psi

  • 15. 
    ASSE Standard 1037 (Flushometers for Plumbing Fixtures) requires a/an 
    • A. 

      Atmospheric vacuum breaker

    • B. 

      Reduced pressure principle assembly

    • C. 

      Air gap separation

    • D. 

      Double check valve assembly

  • 16. 
    • A. 

      The pressure drop across the 1st check valve must be 1 psid

    • B. 

      The pressure differential relief valve is hydraulically dependent & mechanically independent

    • C. 

      The pressure drop across the #2 check must be at least 5 psid

    • D. 

      The pressure in zone 2 (reduced pressure zone) must exceed supply pressure for the relief valve to discharge

  • 17. 
    • A. 

      A Pressure Vacuum Breaker Assembly should not be installed where it is subject to backpressure

    • B. 

      A Reduced Pressure Principle Assembly should be installed in place of the PVB

    • C. 

      A Double Check Backflow Prevention Assembly should be installed in place of the PVB

    • D. 

      Both a & b

  • 18. 
    Which test cock may be opened to establish flow through a backflow prevention assembly? 
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 19. 
    _____________ is an increase of pressure in a closed system due to the heating and expanding of water. 
    • A. 

      Relief valve

    • B. 

      Backpressure

    • C. 

      Thermal expansion

    • D. 

      BTU

  • 20. 
    Which of the following cannot have a shutoff valve installed downstream? 
    • A. 

      Air gap

    • B. 

      Pressure Vacuum Breaker Assembly

    • C. 

      Atmospheric Type Vacuum Breaker

    • D. 

      Double Check Backflow Prevention Assembly

  • 21. 
    A Hose Connection Backflow Preventer is a high-hazard protection valve that contains 2…… 
    • A. 

      Check valves

    • B. 

      Isolation valves

    • C. 

      Vent ports

    • D. 

      Intermediate zone pressure

  • 22. 
    _________________ should be considered when installing a cross connection control device 
    • A. 

      Sidewall clearances

    • B. 

      Degree of hazard

    • C. 

      Distance of backflow device from the floor level

    • D. 

      All listed

  • 23. 
    A sub-atmospheric pressure can also be referred to as 
    • A. 

      Psid

    • B. 

      Psia

    • C. 

      Backpressure

    • D. 

      Vacuum

  • 24. 
    A carbonated beverage machine requires a Backflow Preventer for Beverage Dispensing Equipment. This protection is needed because of           
    • A. 

      The carbon dioxide gas

    • B. 

      The increased acidity of the water

    • C. 

      The higher pH level affecting the copper pipe

    • D. 

      All listed

  • 25. 
    Thermal expansion       …….. 
    • A. 

      Is the pressure increase which occurs in a piping system every time a water heater comes on to recover the temperature lost through the usage of hot water

    • B. 

      Occurs in any hot water system when water is heated or recovered during periods of non-use

    • C. 

      Can cause a dangerous increase in pressure

    • D. 

      All listed

  • 26. 
    The #2 test cock of a Double Check Backflow Prevention Assembly is located 
    • A. 

      Upstream of shutoff valve #1

    • B. 

      Upstream of check valve #1

    • C. 

      Downstream of shutoff valve #2

    • D. 

      Between #1 & #2 check valve

  • 27. 
    According to ASSE Series 5000, the test results for any backflow prevention assembly should be sent to 
    • A. 

      The owner of the property

    • B. 

      Water purveyor

    • C. 

      Tenant of the property

    • D. 

      All listed

  • 28. 
    The springs on the 2 check valves of a Reduced Pressure Principle Backflow Preventer are…… 
    • A. 

      Located outside the body of the assembly

    • B. 

      Externally loaded

    • C. 

      Not interchangeable

    • D. 

      Interchangeable

  • 29. 
    A small hole in the underground potable water distribution system may 
    • A. 

      Reduce the incoming pressure significantly

    • B. 

      Allow contamination of the system from backshiphonage backflow (venture effect)

    • C. 

      Created backpressure backflow

    • D. 

      Increase the system pressure

  • 30. 
    Backflow can occur whenever the pressure in a potable water system is__________the pressure in a non-potable piping  system, and the 2 systems are physically connected. 
    • A. 

      Greater than

    • B. 

      Less than

    • C. 

      Equal to

    • D. 

      About the same

  • 31. 
    What is the required backflow prevention assembly for a fire suppression system containing chemicals? 
    • A. 

      Reduced Pressure Detector Fire Protection Backflow Prevention Assembly or Reduced Pressure Principle Assembly

    • B. 

      Double Check Detector Fire Protection Backflow Prevention Assembly or Double Check Backflow Prevention Assembly

    • C. 

      Pressure Vacuum Breaker Assembly

    • D. 

      Dual Check Valve Type Backflow Preventer

  • 32. 
    A Backflow Preventer with Intermediate Atmospheric Vent must be installed to allow……. 
    • A. 

      Drainage between the check valves

    • B. 

      Full-port flow

    • C. 

      Horizontal flow

    • D. 

      Horizontal flow

  • 33. 
    The 2nd check valve on a Reduced Pressure Principle Backflow Preventer Assembly is tested by appling backpressure 
    • A. 

      Upstream of the 2nd check valve

    • B. 

      Downstream of the 2nd check valve

    • C. 

      In the pressure differential zone

    • D. 

      From test cock 4 to test cock 1

  • 34. 
    Differential pressure gauges should be stored with all needle valves,                    
    • A. 

      Closed & hoses drained

    • B. 

      Partially opened

    • C. 

      Opened & hoses drained

    • D. 

      Removed

  • 35. 
    Which of the following is an acceptable backflow prevention assembly? 
    • A. 

      Swivel connection

    • B. 

      Spool piece

    • C. 

      2 swing checks in tandem

    • D. 

      None listed

  • 36. 
    The mechanical components of a Hose Connection Vacuum Breaker include a/an
    • A. 

      Test cock

    • B. 

      Check valve & vent

    • C. 

      Pressure regulator

    • D. 

      Shutoff valve

  • 37. 
    The following absolute pressure could cause backsiphonage to occur in a hydraulic system (distribution system) at sea level…….  
    • A. 

      10.5 psia

    • B. 

      15.0 psia

    • C. 

      33.9 psia

    • D. 

      100 psia

  • 38. 
    • A. 

      Both would be 43.3 psi

    • B. 

      Unable to determine

    • C. 

      The 6" line would be greater in pressure

    • D. 

      Both would be 100 psi

  • 39. 
    A system that includes any chemical injector must have the potable system protected with a/an 
    • A. 

      Atmospheric Type Vacuum Breaker

    • B. 

      Dual Check Valve Type Backflow Preventer

    • C. 

      Pressure Vacuum Breaker Assembly

    • D. 

      Reduced Pressure Principle Assembly

  • 40. 
    Which of the following will NOT create a closed loop piping system? 
    • A. 

      Pressure relief valve

    • B. 

      Closed gate valve

    • C. 

      Dual check valve type backflow preventer

    • D. 

      Double check backflow prevention assembly

  • 41. 
    An indirect cross connection allows what type of backflow to occur? 
    • A. 

      Backpressure

    • B. 

      Indirect

    • C. 

      Backsiphonage & backpressure

    • D. 

      Backsiphonage

  • 42. 
    Before testing the #1 check valve of a Double Check Backflow Prevention Assembly, you must first., 
    • A. 

      Attach the high pressure hose to test cock #3

    • B. 

      Attach the low pressure hose to test cock #2

    • C. 

      Close shutoff valve #1

    • D. 

      Flush all 4 test cocks

  • 43. 
    If not marked, the critical level of a Pressure Vacuum Breaker Assembly is assumed to be the level of the 
    • A. 

      Air inlet valve

    • B. 

      Bottom of the inlet piping

    • C. 

      Shutoff valve #2

    • D. 

      Bottom of the device

  • 44. 
    When testing a Double Check Valve Backflow Prevention Assembly, the #2 shutoff valve must be closed first to 
    • A. 

      Prevent backpressure during the test

    • B. 

      Prevent backsiphonage during the test

    • C. 

      Hold water in the downstream piping

    • D. 

      Maintain pressure in the assembly

  • 45. 
    A submerged garden hose being used to fill a swimming pool is considered, 
    • A. 

      An indirect cross-connection

    • B. 

      A direct cross-connection

    • C. 

      Backsiphonage

    • D. 

      Backpressure

  • 46. 
    The type of backflow protection assembly required for the main water supply to a waste water treatment plant is... 
    • A. 

      A Pressure Type Vacuum Breaker Assembly

    • B. 

      A Reduced Pressure Principle Assembly

    • C. 

      A Double Check Backflow Prevention Assembly

    • D. 

      Atmospheric Type Vacuum Breaker

  • 47. 
    • A. 

      33.9 foot column of water at sea level

    • B. 

      10.0 foot water column at sea level

    • C. 

      6" air gap

    • D. 

      1" air gap

  • 48. 
    Which of the following may cause a leaking check valve?
    • A. 

      Dirty or damaged check disc

    • B. 

      Damaged check seat

    • C. 

      Broken or damaged spring

    • D. 

      All listed

  • 49. 
    If the check valve springs are interchanged on a Double Check Backflow Prevention Assembly, the assembly.. 
    • A. 

      Will not protect against backflow

    • B. 

      Will create a significant pressure drop

    • C. 

      Will not affect the downstream pressure

    • D. 

      Will cause the assembly to malfunction

  • 50. 
    If the air inlet valve of a Pressure Vacuum Breaker Assembly will not seat, the 
    • A. 

      Air inlet valve should be wired closed

    • B. 

      Check valve should be removed

    • C. 

      Canopy cover should be replaced

    • D. 

      Supply pressure is too low

  • 51. 
    Why are test cocks flushed? 
    • A. 

      Protect test gauges from damage

    • B. 

      Remove lodged foreign material

    • C. 

      Determine the test cocks are not plugged

    • D. 

      All listed

  • 52. 
    What is the atmospheric pressure at sea level? 
    • A. 

      33.9 psi

    • B. 

      0 psi

    • C. 

      40 psi

    • D. 

      14.7psi

  • 53. 
    One general service procedure to follow after repair and upon re-assembly of a backflow prevention assembly is lubrication of some parts. Which of the following is an acceptable lubricant? 
    • A. 

      Petroleum based oil

    • B. 

      Pipe dope

    • C. 

      Water resistant lubricants complying with FDA requirements for use in potable water systems

    • D. 

      All listed

  • 54. 
    An absolute pressure of 25 psia (at sea level) is equal to approximately 
    • A. 

      5 psig

    • B. 

      10 psig

    • C. 

      15 psig

    • D. 

      20 psig

  • 55. 
    Prior to attaching a test kit to a Reduced Pressure Principle Backflow Preventer, the tester opens test cock #4 and  allows it to trickle while he/she flushes the remaining test cocks. Why is this done? 
    • A. 

      To establish a static pressure equilibrium in the reduced pressure assembly

    • B. 

      To prevent the relief valve from prematurely opening

    • C. 

      To prevent the test gauge from being fouled with debris

    • D. 

      To establish a differential pressure on the gauge

  • 56. 
    According to ASSE Series 5000, which of the following is the 1st step prior to testing a backflow prevention assembly? 
    • A. 

      Bleed the air from the gauge hoses

    • B. 

      Install the test cock adapters

    • C. 

      Flush the test cocks of dirt & debris

    • D. 

      Inform the user that the water will be shut off

  • 57. 
    • A. 

      The Double Check Backflow Prevention Assembly should be replaced with an air gap

    • B. 

      The Double Check Backflow Prevention Assembly should be replaced with a dual check

    • C. 

      The Double Check Backflow Prevention Assembly should be replaced with AVB

    • D. 

      None listed

  • 58. 
    An air gap separation is measured from the outlet to the……. 
    • A. 

      Fixture drain plug

    • B. 

      Level of the liquid

    • C. 

      Flood level rim of the receptacle

    • D. 

      None listed

  • 59. 
    It is recommended that a Double Check Backflow Prevention Assembly be installed with its critical level a minimum of……. 
    • A. 

      6" from a wall

    • B. 

      12" above the highest point of use

    • C. 

      12" above the surrounding ground or floor

    • D. 

      30" above the surrounding ground or floor

  • 60. 
    Which of the following is NOT an example of isolation protection?
    • A. 

      An air gap in the water supply to a swimming pool

    • B. 

      A Double Check Valve Assembly installed at the service connection of a warehouse

    • C. 

      An Atmospheric Type Vacuum Breaker on a laboratory faucet

    • D. 

      A Hose Connection Vacuum Breaker on a homeowner's hose bibb

  • 61. 
    The type of protection required for a closed loop heating system containing chemicals is….
    • A. 

      Reduced Pressure Principle Assembly

    • B. 

      Double Check Valve Assembly

    • C. 

      Pressure Vacuum Breaker Assembly

    • D. 

      Dual Check Valve Type Backflow Preventer

  • 62. 
    When a toxic source is connected under pressure with a potable water system, what is the best method of protection? 
    • A. 

      Maintaining a chlorine residual of 0.5 ppm

    • B. 

      Installing a Reduced Pressure Backflow Preventer on the downstream side of the connection

    • C. 

      Installing a Reduced Pressure Backflow Preventer on the upstream side of the connection

    • D. 

      Installing an air gap between the 2 systems

  • 63. 
    What is the required # of test cocks on a large (2 ½” - 4") Atmospheric Type Vacuum Breaker? 
    • A. 

      1

    • B. 

      2

    • C. 

      4

    • D. 

      None

  • 64. 
    What is the most common backflow preventer to be installed at a residential meter? 
    • A. 

      Atmospheric Type Vacuum Breaker

    • B. 

      Dual Check Valve Type Backflow Preventer

    • C. 

      Backflow Preventer with Intermediate Atmospheric Vent

    • D. 

      Pressure Vacuum Breaker Assembly

  • 65. 
    Which of the following would be classified as high -hazard? 
    • A. 

      Radioactive waste

    • B. 

      Raw sewage

    • C. 

      Caustic soda

    • D. 

      All listed

  • 66. 
    What does the term GAUGE PRESSURE refer to?
    • A. 

      The pressure on the gauge plus atmospheric pressure

    • B. 

      The pressure on the gauge above or below atmospheric pressure

    • C. 

      The pressure on the gauge above sea level

    • D. 

      The pressure on the gauge minus atmospheric pressure

  • 67. 
    Which of the following are types of cross connection? 
    • A. 

      Pollutant & contaminant

    • B. 

      Backsiphonage & backpressure

    • C. 

      Toxic & non-toxic

    • D. 

      Direct & indirect

  • 68. 
    Differential pressure 
    • A. 

      May be described as the difference in pressure between 2 locations in a piping system

    • B. 

      A condition when upstream pressure is applied continuously to a device or assembly

    • C. 

      Is the pressure caused by the weight of atmosphere

    • D. 

      Is equal to gauge pressure plus atmospheric pressure

  • 69. 
    A Dual Check Valve Type Backflow Preventer is a device used to protect against. 
    • A. 

      Low & high hazards, backpressure, & backsiphonage

    • B. 

      Low hazard, backpressure, & backsiphonage

    • C. 

      Low & high hazards backsiphonage

    • D. 

      High hazard backpressure

  • 70. 
    To exert a pressure of 1 psi at the base of a column of water, how high would the column have to be? 
    • A. 

      4.34"

    • B. 

      12"

    • C. 

      14.7"

    • D. 

      27.75"

  • 71. 
    Backpressure is any pressure….. 
    • A. 

      Below 20 psi

    • B. 

      Below atmospheric pressure

    • C. 

      Above 2 psi

    • D. 

      Greater than supply pressure

  • 72. 
    During a field test procedure, it is necessary to record the pressure differential at which the relief valve opens for a... 
    • A. 

      Reduced Pressure Principle Backflow Preventer

    • B. 

      Double Check Detector Assembly Backflow Preventer

    • C. 

      Reduced Pressure Detector Backflow Preventer

    • D. 

      Both a & c

  • 73. 
    A Reduced Pressure Principle Backflow Preventer relief valve that vents a small amount of water continuously is caused by a/an…. 
    • A. 

      Faulty check valve #1

    • B. 

      Reduction in supply pressure

    • C. 

      Faulty shutoff valve #2

    • D. 

      Increase in the supply pressure

  • 74. 
    Which of the following is NOT a component of a Double Check Backflow Prevention Assembly? 
    • A. 

      4 properly located resilient seated test cocks

    • B. 

      An air relief valve.

    • C. 

      2 mechanically independent spring loaded check valves

    • D. 

      2 resilient seated shutoff valves

  • 75. 
    Any arrangements of pipes, fittings, fixtures, or devices that connects a non-potable system to a potable water system is called….. 
    • A. 

      A backflow preventer

    • B. 

      Non-potable water

    • C. 

      Backsiphonage

    • D. 

      Cross-connection

  • 76. 
    Lubricants used on backflow assemblies should be….   
    • A. 

      Nontoxic

    • B. 

      Water resistant

    • C. 

      FDA approved

    • D. 

      All listed

  • 77. 
    A Reduced Pressure Principle Backflow Preventer's relief valve operates from the inlet water pressure & the water pressure at the…. 
    • A. 

      #2 shutoff valve

    • B. 

      Atmospheric vent

    • C. 

      #4 test cock

    • D. 

      Intermediate zone pressure

  • 78. 
    The Laboratory Faucet Backflow Preventer is NOT intended to be…… 
    • A. 

      Hydraulically shocked

    • B. 

      Installed in areas without toxic fumes

    • C. 

      Operated with continuous pressure

    • D. 

      Washed with de-ionized water

  • 79. 
    Test cock #1 on a 2" and smaller Pressure Vacuum Breaker Assembly is located between the check valve & the... 
    • A. 

      Air inlet valve

    • B. 

      Inlet valve cover

    • C. 

      Inlet shutoff valve #1

    • D. 

      Outlet shutoff valve #2

  • 80. 
    An Atmospheric Type Vacuum Breaker is installed for…… 
    • A. 

      Backpressure - continuous use

    • B. 

      Backpressure-non continuous use

    • C. 

      Backsiphonage - continuous use

    • D. 

      Backsiphonage - non continuous use

  • 81. 
    How often do most differential pressure gauge manufacturers recommend that gauges be recalibrated (recertified)? 
    • A. 

      Every 6 months

    • B. 

      Every 2 years

    • C. 

      Annually

    • D. 

      None listed

  • 82. 
    The minimum pressure drop across each check valve of a Double Check Backflow Prevention Assembly in a stale condition must be at least…. 
    • A. 

      0.5 psi

    • B. 

      1 psi

    • C. 

      2 psi

    • D. 

      3 psi

  • 83. 
    Gauge pressure…          
    • A. 

      Shall mean pounds per square inch which are registered on a gauge

    • B. 

      Does not measure the amount of pressure above atmospheric pressure

    • C. 

      Does not measure the amount of pressure below atmospheric pressure

    • D. 

      None listed

  • 84. 
    What is the primary consideration when determining which type of backflow preventer to install? 
    • A. 

      Cost

    • B. 

      Customer preference

    • C. 

      Degree of hazard

    • D. 

      System temprature

  • 85. 
    Which valve should be closed when testing check valve #2 on a REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER ASSEMBLY? 
    • A. 

      Shutoff valve #2

    • B. 

      Test cock #3

    • C. 

      Shutoff valve #1

    • D. 

      Test cock #4

  • 86. 
    Backsiphonage is a form of backflow due to reduced or sub-atmoshperic pressure within the water supply. 
    • A. 

      True

    • B. 

      False

  • 87. 
    When fluctuating water pressure causes a REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER to discharge, it indicates the assembly is malfunctioning   
    • A. 

      True

    • B. 

      False

  • 88. 
    The reduced pressure zone on a REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER ASSEMBLY device is located between the 1st & 2nd check valves. 
    • A. 

      True

    • B. 

      False

  • 89. 
    A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER ASSEMBLY is the most reliable type of backflow prevention.   
    • A. 

      True

    • B. 

      False

  • 90. 
    Test cock #1 on a DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY is not normally used when testing the device.  
    • A. 

      True

    • B. 

      False

  • 91. 
    What does the term 'AIR GAP SEPARATION refer to? 
    • A. 

      A hole in the supply piping

    • B. 

      A gap in the air line to a receiving vessel

    • C. 

      A physical break between the water supply line & the flood level rim of the receiving vessel

    • D. 

      A mechanical type backflow prevention device

  • 92. 
    Containment is the placement of backflow prevention devices or assemblies at the point of delivery of water to the consumer. What does containment protect against? 
    • A. 

      Backflow of contaminants & pollutants into consumer's domestic water system

    • B. 

      Backflow of contaminants & pollutants into the public water supply system from the consumer's domestic water system

    • C. 

      Each water outlet within the consumer's premises from the backf low of contaminants & pollutants into the domestic water system

    • D. 

      The domestic water system against thermal expansion

  • 93. 
    Who does the responsibility belong to for maintaining the quality of water to the last free flowing tap? 
    • A. 

      The plumber

    • B. 

      The tester

    • C. 

      The water purveyor

    • D. 

      The Health Department

  • 94. 
    The mechanical components of a HOSE CONNECTION VACUUM BREAKER include a/an… 
    • A. 

      Test cock

    • B. 

      Check valve & vent

    • C. 

      Pressure regulator

    • D. 

      Pressure regulator

  • 95. 
    Which statement is true about a REDUCED PRESSURE PRINCIPLE BACKFLOW  PREVENTER? 
    • A. 

      The pressure drop across the 1st check must be 1 psig

    • B. 

      The pressure differential relief valve is hydraulically dependent & mechanically independent

    • C. 

      The pressure drop across the #2 check must be at least 5 psig

    • D. 

      The pressure in zone 2 (the reduced pressure zone) must exceed the supply pressure for the relief valve to discharge

  • 96. 
    Manufacturers recommend that backflow protection assemblies be inspected by a certified tester at least.... 
    • A. 

      Every 6 months

    • B. 

      Annually

    • C. 

      Every 2 years

    • D. 

      Every 3 years

  • 97. 
    Scenario……         There are 2 columns of water. Each is 100' in height. One column is a 6"   diameter line. The other column is a 1" diameter line. What would the pressure at the bottom of the columns be? 
    • A. 

      Both would be 43.3 psi

    • B. 

      Unable to determine

    • C. 

      The 6" line would be greater in pressure

    • D. 

      Both columns would be 100 psi

  • 98. 
    For containment protection in a high hazard situation, the minimum protection required shall be. 
    • A. 

      DOUBLE CHECK BACKFLOW ASSEMBLY

    • B. 

      ATMOSPHERIC TYPE VACUUM BREAKER

    • C. 

      REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER

    • D. 

      DUAL CHECK VALVE TYPE BACKFLOW PREVENTER

  • 99. 
    Which is NOT considered an example of a backflow prevention assembly? 
    • A. 

      PRESSURE VACUUM BREAKER ASSEMBLY

    • B. 

      ATMOSPHERIC TYPE VACUUM BREAKER

    • C. 

      DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY

    • D. 

      REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION ASSEMBLY

  • 100. 
    Which assembly/device CANNOT have a shutoff valve installed downstream? 
    • A. 

      AIR GAP

    • B. 

      PRESSURE VACUUM BREAKER ASSEMBLY

    • C. 

      ATMOSPHERIC TYPE VACUUM BREAKER

    • D. 

      DOUBL CHECK BACKFLOW PREVENTION ASSEMBLY