Backflow written pre test with complete verified solutions

Backflow written pre test
with complete verified
solutions
Backflow is the undesirable reversal of flow of water or other
substances through a cross connection into the public water system
or consumer's:

a. non potable water system.
b. used water system or consumer's potable water system.
c. public water system or consumer's potable water system.
d. public water system or consumer's non potable system.
C. public water system or consumer's potable water system
An approved ail gap (AG) is a physical separation between the free-
flowing end of a:

a. non potable water supply pipeline and the oveflow rim of an open
or non-pressurized receiving vessel.
b. potable water supply pipeline and the overflow drain of an open
or non-pressurized receiving vessel. c. potable water supply pipeline
and the overflow rim of an open or pressurized receiving vessel.
d. potable water supply pipeline and the overflow rim of an open or
non-pressurized receiving vessel.
d. potable water supply pipeline and the overflow rim of an open or
non-pressurized receiving vessel.
An indirect cross-connection is one that is subject to what type of
backflow?
a. only backsiphonage
b. only backpressure
c. only low hazard, backsiphonage or backpressure d. high or low
hazard, backsiphonage or backpressure
a. only backsiphonage
Cross-connections between the potable water piping and any piping
or containers

,containing substances not approved as potable water must be
either eliminated or
controlled by the installation of an:
a. air gap or a backflow prevention device.
b. approved air break or an backflow prevention device.
c. approved air gap or an approved backflow prevention device.
d. approved air gap or an approved backflow prevention assembly
c. approved air gap or an approved backflow prevention device.
While testing CV#2 of a DCVA, if CV #2 leaks, the BAT would
observe that the water flow:
a. stops from the sight tube at TC #3 and no differential shows on
the gauge.
b. stops from the sight tube at TC tt4 and at least 1.0 psid shows on
the gauge.
c. continues from the sight tube at TC H and at least 1.0 psid shows
on gauge
d. stops from the sight tube at TC #4 and no differential shows on
the gauge.
d. stops from the sight tube at TC #4 and no differential shows on
the gauge.
Service protection is a way to protect a public water system from
contamination due to backflow from the customer's water system by
the installing an approved backflow preventer at the:
a. service connection which is considered to be at or near the water
meter.
b. service connection which is considered to be the end of the
customer's potable water system furthest from the meter
c. point of use which is considered to be the start of the customer's
potable water system where the pipe goes through the outside wall
of the building.
d. point of use which is normally considered to be inside the
building.
a. service connection which is considered to be at or near the water
meter.
A Washington state certified Backflow Assembly Tester is certified
to:
a. inspect, test and repair backflow prevention assemblies'
b. inspect, test and monitor backflow prevention devices.

, c. inspect, test and repair backflow prevention devices'
d. inspect, test and monitor backflow prevention assemblies.
d. inspect, test and monitor backflow prevention assemblies.
The RPBA is designed so that if a check valve leaks, the relief valve
may:
a. close to prevent water from entering the relief valve vent'
b. open to discharge through the relief valve vent.
c. open to discharge through the zone of reduced pressure.
d. close to prevent water from entering the zone of reduced
pressure.
b. open to discharge through the relief valve vent.
An AG installed in lieu of an approved backflow prevention assembly
must be inspected for compliance with the definition of an approved
air gap by:
a. only a BAT.
b. only a CCS.
c. either a CCS or a BAT.
d. both a CCS and a BAT.
c. either a CCS or a BAT.
After testing an approved backflow prevention assembly the BAT
shall complete a test report that is acceptable to the:
a. DOH.
b. LAA.
c. purveyor.
d. customer
c. purveyor.
The gauge on a differential pressure test kit indicates a. psia.
b psig.
c. psid.
d. psiy.
c. psid
Loading a check valve with springs or weights:
a. increases pressure downstream of the check valve
b. reduces pressure upstream of a check valve.
c. reduces pressure downstream of the check valve.
d. increases pressure upstream of the check valve
c. reduces pressure downstream of the check valve.