BACKFLOW EXAM SCRIPT FINAL PAPER
QUESTIONS ANSWERS COMPREHENSIVE
STUDY RESOURCE
●● Absolute Pressure 2
Answer: The sum of gauge pressure and atmospheric pressure
●● Accessible
Answer: Capable of being reached for testing and maintenance, when
referring to a backflow assembly. May also require the removal of an
access panel.
●● Administrative Authority
Answer: The individual offical, board, department, or agency established
and authorized by a state, country, city or other political entity created
by law to administer and enforce the provisions of the cross connection
control program
●● Air Gap
Answer: A physical separation between the free flowing discharge end of
a potable water supply pipeline and and open or non-presssure receiving
vessel.
, ●● Air Gap Specs
Answer: An approved air gap shall be at least twice the diameter of the
supply pipe measured vertically above the overflow rim of the receiving
vessel (in no case less than 1 inch)
●● Approved Backflow Prvention Assembly
Answer: An assembly that has been investigated and approved by the
administrative authority having jurisdiction. The approval of backflow
prevention assemblies by the administrative authority shall be on the
basis of a favorable laboratory and field evaluation report by an
approved testing laboratory recommending such approval
●● Approved Check Valve
Answer: A check valve that is drip=tight in the normal direction of flow
when the inlt pressure is at least 1.0psi and the outlet prssure is zero. The
check valve shall permit no leakagein a direction reverse to the normal
flow. Th closure element shall be intrnally loaded to promote rapid and
positive closure. An approved check valve is only one component of an
approved backflow prevention assembly.
●● Approved Testing Laboratory
Answer: The Foundation for Cross-Connection Control and Hydraulic
Research of the University of Southern California or other laboratory
having equivalent capabilities for both the laboratory and field
evaluation of backflow prevention assemblies.
QUESTIONS ANSWERS COMPREHENSIVE
STUDY RESOURCE
●● Absolute Pressure 2
Answer: The sum of gauge pressure and atmospheric pressure
●● Accessible
Answer: Capable of being reached for testing and maintenance, when
referring to a backflow assembly. May also require the removal of an
access panel.
●● Administrative Authority
Answer: The individual offical, board, department, or agency established
and authorized by a state, country, city or other political entity created
by law to administer and enforce the provisions of the cross connection
control program
●● Air Gap
Answer: A physical separation between the free flowing discharge end of
a potable water supply pipeline and and open or non-presssure receiving
vessel.
, ●● Air Gap Specs
Answer: An approved air gap shall be at least twice the diameter of the
supply pipe measured vertically above the overflow rim of the receiving
vessel (in no case less than 1 inch)
●● Approved Backflow Prvention Assembly
Answer: An assembly that has been investigated and approved by the
administrative authority having jurisdiction. The approval of backflow
prevention assemblies by the administrative authority shall be on the
basis of a favorable laboratory and field evaluation report by an
approved testing laboratory recommending such approval
●● Approved Check Valve
Answer: A check valve that is drip=tight in the normal direction of flow
when the inlt pressure is at least 1.0psi and the outlet prssure is zero. The
check valve shall permit no leakagein a direction reverse to the normal
flow. Th closure element shall be intrnally loaded to promote rapid and
positive closure. An approved check valve is only one component of an
approved backflow prevention assembly.
●● Approved Testing Laboratory
Answer: The Foundation for Cross-Connection Control and Hydraulic
Research of the University of Southern California or other laboratory
having equivalent capabilities for both the laboratory and field
evaluation of backflow prevention assemblies.
