Backflow questions with accurate answers
"Containment protection" Ans✓✓✓ Offers no protection to individuals
within a facility
A 1/4" potable water supply should have what size air gap between the
supply pipe and the flood level rim? Ans✓✓✓ 1"
A barometric loop is effective against... Ans✓✓✓ Backsiphonage
A double check Backflow prevention assembly can be used on a system
with antifreeze... Ans✓✓✓ Should never be used
A Double Check Backflow Prevention Assembly that has an equal
pressure between a check's inlet and outlet suggests that the... Ans✓✓✓
Check has failed
A Double Check Backflow Prevention Assembly with 50 psi greater
pressure on the downstream side of the check valve #2 than on the
upstream side of check valve #1 has... Ans✓✓✓ A failed 2nd check
A double check detector fire protection Backflow prevention assembly
contains 1... Ans✓✓✓ Flow meter/indicator
A factor in water contamination through a cross connection Ans✓✓✓
Turning off service to a multi-story building and allowing the water
supply to drain
, A hose connection vacuum breaker can be subject to... Ans✓✓✓ High
Hazard
A Pressure Vacuum Breaker Assembly's shut off valves... Ans✓✓✓
Are located at the inlet and the outlet of all assemblies
A qualified backflow tester's certification is valid for... Ans✓✓✓ 3
years
A RP relief valve that vents a small amount of water continuously is
caused by a... Ans✓✓✓ Reduction of supply pressure
A system with a chemical injector must protect potable system with
what? Ans✓✓✓ A RP
Advantage of using an air gap... Ans✓✓✓ Only a visual check is
required to check proper functioning
ALL backflow assemblies are required to have... Ans✓✓✓ A check, a
test cock, and isolation valves
An AVB cannot be used to prevent Backflow caused by.... Ans✓✓✓
Backpressure
"Containment protection" Ans✓✓✓ Offers no protection to individuals
within a facility
A 1/4" potable water supply should have what size air gap between the
supply pipe and the flood level rim? Ans✓✓✓ 1"
A barometric loop is effective against... Ans✓✓✓ Backsiphonage
A double check Backflow prevention assembly can be used on a system
with antifreeze... Ans✓✓✓ Should never be used
A Double Check Backflow Prevention Assembly that has an equal
pressure between a check's inlet and outlet suggests that the... Ans✓✓✓
Check has failed
A Double Check Backflow Prevention Assembly with 50 psi greater
pressure on the downstream side of the check valve #2 than on the
upstream side of check valve #1 has... Ans✓✓✓ A failed 2nd check
A double check detector fire protection Backflow prevention assembly
contains 1... Ans✓✓✓ Flow meter/indicator
A factor in water contamination through a cross connection Ans✓✓✓
Turning off service to a multi-story building and allowing the water
supply to drain
, A hose connection vacuum breaker can be subject to... Ans✓✓✓ High
Hazard
A Pressure Vacuum Breaker Assembly's shut off valves... Ans✓✓✓
Are located at the inlet and the outlet of all assemblies
A qualified backflow tester's certification is valid for... Ans✓✓✓ 3
years
A RP relief valve that vents a small amount of water continuously is
caused by a... Ans✓✓✓ Reduction of supply pressure
A system with a chemical injector must protect potable system with
what? Ans✓✓✓ A RP
Advantage of using an air gap... Ans✓✓✓ Only a visual check is
required to check proper functioning
ALL backflow assemblies are required to have... Ans✓✓✓ A check, a
test cock, and isolation valves
An AVB cannot be used to prevent Backflow caused by.... Ans✓✓✓
Backpressure
