Backflow Test questions with accurate answers
A consumer claims his DCVA must be causing a steady reduction of
pressure over the last 6 months. Your option might be to Ans✓✓✓
Replace the service line because its probably full of scale
A damaged or dirty disc or seat of an RPBA may account for ______
Ans✓✓✓ A low first check differential
A differential pressure gauge described in the Nebraska standards for
testing backflow preventers should be designed for ________ Ans✓✓✓
0-15 PSID
A differential pressure relief vlave on an RPBA that failed after testing
can have two _________ which must be inspected Ans✓✓✓
Diaphragms
A leaky check valve of a DCVA could be due to _________ Ans✓✓✓
The guide members hanging up
A problem sometimes after repairing a DCVA is _______ Ans✓✓✓ A
noisy vibration
A PWS practicing containment to protect the water system from cross
connections encounters an unprotected tap between the meter and the
backflow prevention assembly. In this situation.... Ans✓✓✓ The
installation should not be approved
, A water column 55 1./2" high will create a pressure of _______ psi at
the bottom Ans✓✓✓ 2
A water heater thermal expansion control is required by ______ when a
containment device/assembly is installed Ans✓✓✓ some plumbing
codes
According to the Nebraska regulations what is the minimum acceptable
air gap for a 2" pipe located 1" from the wall Ans✓✓✓ 6"
After a backflow prevention assembly has been tested, a copy of the
certified results is provided to the ______ Ans✓✓✓ Owner
Although not recommended because of the high risk of contamination,
Nebraska standards describe mercury manometers can be used to
calibrate Ans✓✓✓ Differential pressure gauges
Atmospheric pressure at sea level is about ______ psi Ans✓✓✓ 14.7
Back flow prevention testing equipment should be accuracy verified at
least every _______ Ans✓✓✓ year
DCVA and RPBA installations require ________ minimum clearance
below the assembly and a maximum of _________ above ground, work
floor, or permanent working platform Ans✓✓✓ 1'
A consumer claims his DCVA must be causing a steady reduction of
pressure over the last 6 months. Your option might be to Ans✓✓✓
Replace the service line because its probably full of scale
A damaged or dirty disc or seat of an RPBA may account for ______
Ans✓✓✓ A low first check differential
A differential pressure gauge described in the Nebraska standards for
testing backflow preventers should be designed for ________ Ans✓✓✓
0-15 PSID
A differential pressure relief vlave on an RPBA that failed after testing
can have two _________ which must be inspected Ans✓✓✓
Diaphragms
A leaky check valve of a DCVA could be due to _________ Ans✓✓✓
The guide members hanging up
A problem sometimes after repairing a DCVA is _______ Ans✓✓✓ A
noisy vibration
A PWS practicing containment to protect the water system from cross
connections encounters an unprotected tap between the meter and the
backflow prevention assembly. In this situation.... Ans✓✓✓ The
installation should not be approved
, A water column 55 1./2" high will create a pressure of _______ psi at
the bottom Ans✓✓✓ 2
A water heater thermal expansion control is required by ______ when a
containment device/assembly is installed Ans✓✓✓ some plumbing
codes
According to the Nebraska regulations what is the minimum acceptable
air gap for a 2" pipe located 1" from the wall Ans✓✓✓ 6"
After a backflow prevention assembly has been tested, a copy of the
certified results is provided to the ______ Ans✓✓✓ Owner
Although not recommended because of the high risk of contamination,
Nebraska standards describe mercury manometers can be used to
calibrate Ans✓✓✓ Differential pressure gauges
Atmospheric pressure at sea level is about ______ psi Ans✓✓✓ 14.7
Back flow prevention testing equipment should be accuracy verified at
least every _______ Ans✓✓✓ year
DCVA and RPBA installations require ________ minimum clearance
below the assembly and a maximum of _________ above ground, work
floor, or permanent working platform Ans✓✓✓ 1'
