BACKFLOW TESTER EXAM
QUESTIONS AND ANSWERS
A double check valve assembly is installed 12 above the floor for? - Correct Answers -
Maintenance
A low hazard Backflow preventer is a? - Correct Answers -Double Check valve
assembly
A field test report for a double check will include the manufacturer name, model, size
and ?? - Correct Answers -Serial number
Double check valve assembly components are?? - Correct Answers -Independently
acting
A double check valve assembly hydraulic use is?? - Correct Answers -Continuous
A detector assembly contains a device of equal? - Correct Answers -Protection
Each check valve of a double check valve assembly is forced to load to what psi? -
Correct Answers -1.0
A double check valve assembly is required to contain test cocks that total? - Correct
Answers -4
A double check valve assembly is designed to detect low flow rates up to what gpm -
Correct Answers -1
A double check detector assembly is referenced as a? - Correct Answers -DCDA
A double check valve assembly installed in a vertical flow down orientation is only
allowed? - Correct Answers -If approved for that orientation
The max height the water will rise in a barometric loop is dependent of? - Correct
Answers -Atmospheric pressure
, The number 1 check spring on a RP has a minimum spring tension requirement of? -
Correct Answers -5 psi
Relief valves are designed to open to atmosphere when supply pressure becomes less
than? - Correct Answers -2 psi
A RP has an inlet supply pressure of 97psi. The pressure in the zone will be at least? -
Correct Answers -92 psi
The purpose of an RP is to? - Correct Answers -Prevent contamination from entering
the water supply
The application of an RP is? - Correct Answers -Any hazard application
The max level of protection provided by a RP is? - Correct Answers -Health hazard
A RP zone pressure should be - Correct Answers -5 psi - less than supply
A RP fouled check valve number 1 may be indicated by - Correct Answers -Continuous
dripping
With both shut off valves closed and test cocks 3-4 open, a continuous discharge from
test cock 4 might indicate a leak through - Correct Answers -Shut off valve number 2
Lock out tag out must be used - Correct Answers -All the above
An RP relief valve is loaded to - Correct Answers -Push the valve away from its seat
The purpose of RP check valve number 1 loading is - Correct Answers -Create a
reduction in water pressure
Intermittent relief valve discharge from a RP is probably caused by - Correct Answers -
Water hammer
Back pressure to a RP fouled check valve number 2 likely - Correct Answers -Forced
the relief valve to open and discharge
An air gap separation must be maintained at a RP,s - Correct Answers -Relief valve
discharge
An RP's "Buffer" can be described as - Correct Answers -Difference between the check
valve 1 loading and the relief valve opening point
When an RP is installed vertically, the relief valve discharge must be - Correct Answers
-Lower than check valve number 1
QUESTIONS AND ANSWERS
A double check valve assembly is installed 12 above the floor for? - Correct Answers -
Maintenance
A low hazard Backflow preventer is a? - Correct Answers -Double Check valve
assembly
A field test report for a double check will include the manufacturer name, model, size
and ?? - Correct Answers -Serial number
Double check valve assembly components are?? - Correct Answers -Independently
acting
A double check valve assembly hydraulic use is?? - Correct Answers -Continuous
A detector assembly contains a device of equal? - Correct Answers -Protection
Each check valve of a double check valve assembly is forced to load to what psi? -
Correct Answers -1.0
A double check valve assembly is required to contain test cocks that total? - Correct
Answers -4
A double check valve assembly is designed to detect low flow rates up to what gpm -
Correct Answers -1
A double check detector assembly is referenced as a? - Correct Answers -DCDA
A double check valve assembly installed in a vertical flow down orientation is only
allowed? - Correct Answers -If approved for that orientation
The max height the water will rise in a barometric loop is dependent of? - Correct
Answers -Atmospheric pressure
, The number 1 check spring on a RP has a minimum spring tension requirement of? -
Correct Answers -5 psi
Relief valves are designed to open to atmosphere when supply pressure becomes less
than? - Correct Answers -2 psi
A RP has an inlet supply pressure of 97psi. The pressure in the zone will be at least? -
Correct Answers -92 psi
The purpose of an RP is to? - Correct Answers -Prevent contamination from entering
the water supply
The application of an RP is? - Correct Answers -Any hazard application
The max level of protection provided by a RP is? - Correct Answers -Health hazard
A RP zone pressure should be - Correct Answers -5 psi - less than supply
A RP fouled check valve number 1 may be indicated by - Correct Answers -Continuous
dripping
With both shut off valves closed and test cocks 3-4 open, a continuous discharge from
test cock 4 might indicate a leak through - Correct Answers -Shut off valve number 2
Lock out tag out must be used - Correct Answers -All the above
An RP relief valve is loaded to - Correct Answers -Push the valve away from its seat
The purpose of RP check valve number 1 loading is - Correct Answers -Create a
reduction in water pressure
Intermittent relief valve discharge from a RP is probably caused by - Correct Answers -
Water hammer
Back pressure to a RP fouled check valve number 2 likely - Correct Answers -Forced
the relief valve to open and discharge
An air gap separation must be maintained at a RP,s - Correct Answers -Relief valve
discharge
An RP's "Buffer" can be described as - Correct Answers -Difference between the check
valve 1 loading and the relief valve opening point
When an RP is installed vertically, the relief valve discharge must be - Correct Answers
-Lower than check valve number 1
