Backflow Practice Exam Questions and
Answers 100% Pass
1) Backflow is the undesirable reversal of flow of water or other substances through a cross
connection into the public water system or consumer's: ✔✔C. Public wa
...
Backflow Practice Exam Questions and
Answers 100% Pass
1) Backflow is the undesirable reversal of flow of water or other substances through a cross
connection into the public water system or consumer's: ✔✔C. Public water system or consumer's
portable water system
2) An approved airgap (AG) is a physical separation between the free-flowing end of a: ✔✔D.
Potable water supply pipe line in the overflow rim of an open or non-pressurized receiving vessel
3) And indirect cross-connection is one that is subject to what type of backflow? ✔✔A. Only
backsiphonage
4 )Cross-connections with between the portable water piping in any piping or containers
containing substances not approved as potable water must be either eliminated or controlled by
the installation of an: ✔✔D. Approved air gap or an approved backflow prevention assembly
5) While testing CV #2 of a DCVA if CV #2 leaks the BAT would observe that the water flow:
✔✔D. Stops from the site tube at TC#4 and no differential shows on the gauge
6) Service protection is a way to protect a public water system from contamination due to back
flow 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
7) A Washington state certified Backflow Assembly Tester is certified to: ✔✔D. Inspect, test
and monitor backflow prevention assemblies
8) The RPBA is designed so that if the check valve leaks, the relief with valve may: ✔✔B. Open
to discharge through the relief valve vent
9) An AG installed in lieu of an approved backflow prevention assembly must be inspected for
compliance with the definition of an improved air gap by: ✔✔C. Either a CCS or a BAT
10) After testing an approved backflow prevention assembly the BAT shall complete a test report
that is acceptable to the: ✔✔C. Purveyor
11) The gauge on a differential pressure test kit indicates: ✔✔C. psid
12) Loading a check valve with springs or weights: ✔✔C. Reduces pressure down stream of the
check valve
13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge unless:
✔✔C. The relief valve is defective
14) Microbiological contaminates entering the portible water system are always a: ✔✔A. Highhealth standard
15) All approved backflow prevention assemblies must be tested with a: ✔✔D. Differential
pressure test kit
16) An approved backflow prevention assembly is an: ✔✔C. RPBA, RPDA, DCVA, DCDA,
PVBA, or SVBA of make, model, and size that is approved by the DOH
17) Permanent support blocks are required under all approved backflow assemblies that are:
✔✔D. A large size assembly
18) A backflow assembly test report must be: ✔✔C. Complete, accurate and legible
19) SOV #1 of a properly installed PVBA
is reported as leaking while testing the air inlet valve if water continues to flow from: ✔✔C. The
high-bleed valve and the differential gauge does not drop to the opening point of the Air Inlet
Valve
20) The differential pressure relief valve must discharge water to the atmosphere when the
pressure in the zone between the check valves is with in: ✔✔B. 2 psi of the pressure upstream of
CV #1
21) The Undesirable reversal of flow of water or other substances through a cross connection
into the public water system or consumers potible water system is: ✔✔D. Backflow
22) While testing CV#2 of an RPBA the BAT must determine if CV#2 closes tight: ✔✔D. In the
reverse direction of flow
23) A DCDA should not be installed: ✔✔B. Where pressure in the water system is greater than
the assembly's maximum working water pressure
24) The contents of the backflow assembly test report completed after testing a backflow
prevention assembly installed at the water meter must meet the requirements of the: ✔✔D.
Water purveyor
25) A vacuum, for the purpose of water system operation, indicate a reduction of water system
pressure to: ✔✔C. A gauge pressure of less than 0 psig
26) The differential test kit that a BAT uses to test backflow prevention assemblies in
Washington State must: ✔✔D. Be verified for accuracy or calibrated within the last 12 months
27) The BAT must confirm that the water in a DCVA is in a static condition by verifying that:
✔✔A. Shut off valve #1 is closed tight
28) Support blocking is required under all: ✔✔D. Large size backflow assemblies
29) The differential pressure relief valve of an RPBA must operate to maintain pressure in the
zone between the two check valves at least: ✔✔C. 2.0 psi less than the pressure upstream of CV
#1
30) Disease causing microbiological contaminants in the potable water system are a(n): ✔✔C.
High-health hazard
31) A two valve differential pressure test kit may be used as long as: ✔✔D. It has been verified
for accuracy and calibrated, if required, within the last 12 months
32) What markings must be on all approved backflow prevention assemblies? ✔✔D.
33) An approved air gap is never less than? ✔✔A
34) A backflow prevention assembly, appropriate for the degree of hazard, installed at the water
meter is called: ✔✔D
35) What is the maximum allowable head loss through an approved double check valve
assembly? ✔✔B
36) What is indicated if, while testing the relief valve of an RPBA, the gauge shows no
differential and the relief valve does not vent? ✔✔B
37)What is indicated if water continues to flow from T/C #2 while testing the CV on a properly
installed PVBA ✔✔B
38) What is first indicated if water continues flowing from the sight tube attached to TC #4 while
testing a DCVA? ✔✔D
39) Using information from question #38, to continue testing, the next step is to: ✔✔D
40) As long as water flows through a normally operating RPBA the relief valve will not vent
unless: ✔✔A
41) An approved DCVA is acceptable backflow protection from: ✔✔C
42) A direct cross-connection exposes a water system to: ✔✔C
43) According to certification regulations (WAC 246-292) a certified BAT's duties are to
inspect, test, and: ✔✔D
44) The check valves in a DCVA must be: ✔✔C
45) An approved RPBA must be shipped assembled from the manufacturer with: ✔✔D
46) If testing CV #2 on a DCVA, the needle on the gauge starts to drop after closing SOV #1 and
before opening TC #4, which component leaks with flow downstream to the customer? ✔✔B
47) While testing an RPBA, if after closing the SOV #2 and the bleed values on the test kit, the
needle on the gauge drops to the lower end and the differential pressure relief value vents, then:
✔✔A
48) The compensating valve is used to get a valid test of a DCVA, PVBA, or SVBA that has a
slight leak at: ✔✔C
49) What must be present in a piping system for backsiphonage backflow to occur? ✔✔A
50) The water purveyor shall ensure that results of a backflow prevention assembly inspections
and tests are documented and reported in a manner acceptable to the: ✔✔D
51) What is reported if the Air Inlet Valve opens while testing the Check Valve on an SVBA?
✔✔B
52) Which test procedure must be used to test an approved RPBA? ✔✔D
53) The test kit must be purged to rid the: ✔✔D
54) A actual cross-connection is: ✔✔B
55) An AVB is a special application device with a float check (poppet), check seat, popped seat,
and an air inlet port and if listed is: ✔✔A
56) Special application backflow devices may be used as service protection: ✔✔D
57) Approved backflow prevention assemblies must be designed to: ✔✔A
58) Your BAT certification must be renewed by: ✔✔D
59) An approved Air Gap is required to be installed, inspected, and maintained on the:B ✔✔B
60) The DOH may suspend or revoke a BAT certification for up to five years if the BAT: ✔✔A
61) A high-health hazard cross-connection is one which could: ✔✔B
62) Loss of pressure through an RPBA is caused by: ✔✔C
63) Differential pressure is indicated as: ✔✔C
64) How often are test kits required to be verified for accuracy or calibrated in Washington
State? ✔✔B
65) What is a certified BAT required to do to properly "monitor" backflow prevention
assemblies? ✔✔D
66) An approved Air Gap is measured between the free flowing end of the: ✔✔D
67) Test cock #1 on an RPBA may be used to get satisfactory test results if: ✔✔D
68) While testing the air inlet value of a PVBA, what would most likely cause the air inlet value
to open after closing SOV #1? ✔✔C
69) The term "purge" means to rid the: ✔✔B
70) An approved DCVA must be installed: ✔✔C
71) What must a certified BAT do to meet professional growth requirements? ✔✔C
72) What must be reported when testing the relief valve is the needle on the gauge will not drop
enough for the relief valve to open and the relief valve does not vent? ✔✔D
73) Who is responsible for having backflow prevention assemblies tested as required by WAC
246-290-490? ✔✔B
74) The Journeyman Plumbers Law, administered by the state Department of Labor and
Industries, deals with the repair and installation of backflow prevention assemblies installed:
✔✔B
75) Which of the following would cause the relief valve of an RPBA to open prematurely? ✔✔D
76) Which air gaps must the BAT inspect to determine whether or not they are approved? ✔✔C
77) An AVB is not properly installed if it is exposed to: ✔✔D
78) An approved RPBA fails the test if the static pressure drop across CV #1: ✔✔C
79) What is the most likely cause of a relief valve sometimes spitting water from the vent? ✔✔B
80) CV#2 of a DCVA is operating satisfactorily if: ✔✔A
81) If, while testing the relief valve of an RPBA, SOV #2 leaks and there is downstream water
use, the next step to connect a: ✔✔B
82) An approved backflow prevention assembly must be tested? ✔✔B
83) Which of the following is NOT a testable backflow preventer? ✔✔A
84) If backpressure is present in a properly operating RPBA, then CV #1 is: ✔✔D
85) A certified CCS may test backflow assemblies: ✔✔D
86) The two types of backflow are: ✔✔C
87) To be acceptable, and RPBA installed in a semi-buried pit must: ✔✔B
88) When testing an approved RPBA, the BAT determines if the relief valve opens when the
supply pressure is at least: ✔✔D
89) The air inlet valve of an approved PVBA is tested to determine at what differential pressure
the: ✔✔D
90) Permanent support blocks are required to be installed on all assemblies: ✔✔B
91) Water occasionally spitting from the relief valve of an approved RPBA is called nuisance
spitting and is most often caused by: ✔✔B
92) In what directions of flow are the check valves tested in an approved RPBA? ✔✔D
93) When testing an RPBA, after closing SOV#2 and both the high and low side bleed valves,
what would cause the gauge to indicate zero psid? ✔✔A
94) What would the gauge indicate as pressure is increased in the zone of reduced pressure,
when testing the relief valve on an RPBA? ✔✔A
95) When testing CV #2 on a DCVA, water continues to flow from the sight tube attached to
TC#4 and the gauge shows no differential, the most likely cause is: ✔✔D
96) When testing the relief valve on an RPBA, the needle on the gauge does not drop to the relief
valve opening point and the relief valve does NOT vent, the most likely cause is? ✔✔B
97) When testing CV#2 of an RPBA, the gauge drops to the relief valve's predetermined opening
point and the relief valve vents, the most likely cause is? ✔✔A
98) When there is no flow and no backpressure, what may cause the relief valve to vent
continuously? ✔✔B
99) While trying to test CV#1 on a DCVA the gauge starts to drop after closing SOV#1 and
before opening TC#3, which of the following may be indicated? ✔✔B
100) Any chemical that is not under the purveyor's direct control is judged to be a: ✔✔B
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