BACK FLOW |QUESTIONS & ANSWERS VERIFIED
SOLUTIONS 100%|GRADE A+|LATEST 2024/2025
what is the difference between check valve 1 and check valve 2 on a double check
valve assembly - ✔✔the two check valves operate the same
in a perfect vacuum, water can be drawn up in a column _______ feet - ✔✔33.9
which of the following is considered to be a chemical contaminant? - ✔✔arsenic
which of the following is considered to be a biological health hazard - ✔✔giardia
what type of assembly has two internally spring loaded check, two shut-off valves,
and four test cocks? - ✔✔double check valve
air gap is the_________ when directly connecting potable water supply lines to
sewerage systems or to radioactive sources? - ✔✔most suitable protection
a bypass of a backflow prevention assemble may be permitted only if the assembly
in the bypass: - ✔✔is the same type
what federal law made water purveyors responsible for water quality all the way
into consumers' homes or businesses? - ✔✔safe drinking water act amendment of
1986
if a column of water is exerting a pressure of 50 psi, how high must the water be
inside the column? - ✔✔115.5
, as the velocity of water increases, pressure: - ✔✔decreases
atmospheric pressure at sea level is _______ psi - ✔✔14.7
a water supply other than the water purveyor's approved supply, that is on or
available to the premises is called a - ✔✔auxiliary water supply
how can a backsiphonage action be broken - ✔✔air gap
what single difficult to regulate item is most commonly associated with cross
connections, specifically through backsiphonage? - ✔✔garden house
the appropriate height fo an air gap is - ✔✔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. - ✔✔check valve #2 is leaking and shutoff valve
#2 is leaking
at what point is the relief valve in an RP required to open - ✔✔2.0 psid
what is the minimum spring tension recommended on the #1 check valve in an
RPZ - ✔✔3 psi greater than the tension on the relief valve.
SOLUTIONS 100%|GRADE A+|LATEST 2024/2025
what is the difference between check valve 1 and check valve 2 on a double check
valve assembly - ✔✔the two check valves operate the same
in a perfect vacuum, water can be drawn up in a column _______ feet - ✔✔33.9
which of the following is considered to be a chemical contaminant? - ✔✔arsenic
which of the following is considered to be a biological health hazard - ✔✔giardia
what type of assembly has two internally spring loaded check, two shut-off valves,
and four test cocks? - ✔✔double check valve
air gap is the_________ when directly connecting potable water supply lines to
sewerage systems or to radioactive sources? - ✔✔most suitable protection
a bypass of a backflow prevention assemble may be permitted only if the assembly
in the bypass: - ✔✔is the same type
what federal law made water purveyors responsible for water quality all the way
into consumers' homes or businesses? - ✔✔safe drinking water act amendment of
1986
if a column of water is exerting a pressure of 50 psi, how high must the water be
inside the column? - ✔✔115.5
, as the velocity of water increases, pressure: - ✔✔decreases
atmospheric pressure at sea level is _______ psi - ✔✔14.7
a water supply other than the water purveyor's approved supply, that is on or
available to the premises is called a - ✔✔auxiliary water supply
how can a backsiphonage action be broken - ✔✔air gap
what single difficult to regulate item is most commonly associated with cross
connections, specifically through backsiphonage? - ✔✔garden house
the appropriate height fo an air gap is - ✔✔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. - ✔✔check valve #2 is leaking and shutoff valve
#2 is leaking
at what point is the relief valve in an RP required to open - ✔✔2.0 psid
what is the minimum spring tension recommended on the #1 check valve in an
RPZ - ✔✔3 psi greater than the tension on the relief valve.
