UPDATE!!!!2025/2026|GUARANTEED
What is the difference between check valve 1 and check valve 2 on a double check valve
assembly - ANSWER the two check valves operate the same
In a perfect vacuum, water can be drawn up in a column _______ feet - ANSWER 33.9
Which of the following is considered to be a chemical contaminant? - ANSWER arsenic
Which of the following is considered to be a biological health hazard - ANSWER giardia
What type of assembly has two internally spring loaded check, two shut-off valves, and four
test cocks? - ANSWER double check valve
Air gap is the_________ when directly connecting potable water supply lines to sewerage
systems or to radioactive sources? - ANSWER most suitable protection
A bypass of a backflow prevention assemble may be permitted only if the assembly in the
bypass: - ANSWER is the same type
What federal law made water purveyors responsible for water quality all the way into
consumers' homes or businesses? - ANSWER safe drinking water act amendment of
1986
1
, If a column of water is exerting a pressure of 50 psi, how high must the water be inside the
column? - ANSWER 115.5
As the velocity of water increases, pressure: - ANSWER decreases
Atmospheric pressure at sea level is _______ psi - ANSWER 14.7
A water supply other than the water purveyor's approved supply, that is on or available to
the premises is called a - ANSWER auxiliary water supply
How can a backsiphonage action be broken - ANSWER air gap
What single difficult to regulate item is most commonly associated with cross connections,
specifically through backsiphonage? - ANSWER garden house
The appropriate height fo an air gap is - ANSWER twice the diameter of the pipe above
the flood rim of vessel, minimum of 1 inch
While testing check balbe #1 on a DC, water recedes from the tuve attached to test cock #3.
The gauge should be moved to the centerline of the assembly and the static pressure drop
across the no. 1 check should be recorded. What other information should be recorded. -
ANSWER check valve #2 is leaking and shutoff valve #2 is leaking
At what point is the relief valve in an RP required to open - ANSWER 2.0 psid
What is the minimum spring tension recommended on the #1 check valve in an RPZ -
ANSWER 3 psi greater than the tension on the relief valve.
According to the USC, what is the correct height for installing an RPZ - ANSWER 12
inches above grade, but no more than 36 inches
2
What is the difference between check valve 1 and check valve 2 on a double check valve
assembly - ANSWER the two check valves operate the same
In a perfect vacuum, water can be drawn up in a column _______ feet - ANSWER 33.9
Which of the following is considered to be a chemical contaminant? - ANSWER arsenic
Which of the following is considered to be a biological health hazard - ANSWER giardia
What type of assembly has two internally spring loaded check, two shut-off valves, and four
test cocks? - ANSWER double check valve
Air gap is the_________ when directly connecting potable water supply lines to sewerage
systems or to radioactive sources? - ANSWER most suitable protection
A bypass of a backflow prevention assemble may be permitted only if the assembly in the
bypass: - ANSWER is the same type
What federal law made water purveyors responsible for water quality all the way into
consumers' homes or businesses? - ANSWER safe drinking water act amendment of
1986
1
, If a column of water is exerting a pressure of 50 psi, how high must the water be inside the
column? - ANSWER 115.5
As the velocity of water increases, pressure: - ANSWER decreases
Atmospheric pressure at sea level is _______ psi - ANSWER 14.7
A water supply other than the water purveyor's approved supply, that is on or available to
the premises is called a - ANSWER auxiliary water supply
How can a backsiphonage action be broken - ANSWER air gap
What single difficult to regulate item is most commonly associated with cross connections,
specifically through backsiphonage? - ANSWER garden house
The appropriate height fo an air gap is - ANSWER twice the diameter of the pipe above
the flood rim of vessel, minimum of 1 inch
While testing check balbe #1 on a DC, water recedes from the tuve attached to test cock #3.
The gauge should be moved to the centerline of the assembly and the static pressure drop
across the no. 1 check should be recorded. What other information should be recorded. -
ANSWER check valve #2 is leaking and shutoff valve #2 is leaking
At what point is the relief valve in an RP required to open - ANSWER 2.0 psid
What is the minimum spring tension recommended on the #1 check valve in an RPZ -
ANSWER 3 psi greater than the tension on the relief valve.
According to the USC, what is the correct height for installing an RPZ - ANSWER 12
inches above grade, but no more than 36 inches
2
