HUN1201 MIDTERM [CH
1,2,3,4,5,6,7,8,&15] (IRSC) FINAL
TEST 2026 QUESTIONS WITH
CORRECT ANSWERS GRADED A+
◍ A local ordinance establishing a cross-connection control program must
require that.
Answer: a certified tester test the assembly at least once each year and report
the test results to the waterauthority in a timely manner
◍ While field testing the check valve of a pressure vacuum breaker, water
continues to flow from the # 2 test cock . How do you proceed ?.
Answer: Open the bleed off valve until the flow slows to a slight drip.
◍ Well field testing the first check valve of a double check valve assembly,
water continues to flow from the site tube. How do you proceed?.
Answer: Observe reading on gauge (first step). Open high side of bleed
valve (second step).
◍ An approved air gap used for backflow prevention shall be.
Answer: a vertical dimension of at least twice the diameter of the supply
pipe and but in no case less thanone inch above the overflow rim
◍ While field testing the check valve of a spill resistant pressure vacuum
breaker, water continues to flow from the vent valve. What does this imply?.
Answer: Number 1 shut off valve is leaking.
◍ The proper location for a backflow prevention assembly for the protection of
a service connection is:.
Answer: in an above grade, protected and accessible site and before any
Tees in the service line
,◍ If water is continuously flowing from the relief valve port of a reduced
pressure principle backflow prevention assembly the person testing the
assembly could report:.
Answer: the first check may be fouled; or the relief valve may have
malfunctioned; or the second check isfouled with backpressure on the
assembly
◍ While field testing the differential pressure relief valve opening point of RP,
it is found that the shut - off valve # 2 is leaking . How should the temporary
bypass hose be connected to compensate for the leak?.
Answer: Test cock # 1 to test cock # 4
◍ While field testing the second check valve of a reduced pressure principle
assembly, high side pressure is applied through test cock # 4 and the gage
reading begins to increase. How do you proceed?.
Answer: Close the # 2 test cock.
◍ While field testing the differential pressure relief valve opening point of an
RP, the high side control needle valve is open, and the low side control
needle valve is open 1/4 turn, however the reading on the gauge will not
lower to the relief valve opening point. What does this imply?.
Answer: Number 2 shut off valve is leaking
◍ What are acceptable field test readings for a properly operating double
check valve assembly?.
Answer: Check valve number 1: 1.0 PSID and above/ check valve number 2:
1.0 P ID and above
◍ Backpressure will cause backflow:.
Answer: through an unprotected feed to a closed make-up water tank
◍ When testing an RP, upon closing the number 2 shut off valve and the high
and low side bleed valves, the gauge reading drops and differential pressure
relief valve begins to discharge. How do you proceed?.
Answer: Record the number 1 check valve is leaking and end the test.
, ◍ While field testing the number 1 check valve of a DC, water continues to
flow from the site tube. What is most likely to be the cause of this situation?.
Answer: Shut off valve #1 one is leaking.
◍ While field testing the differential pressure relief valve of the RP, what
gauge reading indicates a failure?.
Answer: Less than 2.0 PSID
◍ While field testing the air inlet valve of a pressure vacuum breaker, the high
side bleed valve is opened 1/4 turn and the gauge reading will not drop.
How do you proceed?.
Answer: Close the high side bleed valve, then open the number 1 test cock.
◍ The primary responsibility for requiring the testing, maintenance and
reporting on service protection backflow prevention assemblies is normally
vested in the:.
Answer: Water Purveyor
◍ In testing a reduced pressure principle backflow prevention assembly.
Answer: the relief valve must be tested first
◍ While field testing the second check valve of an RP, the high side pressure
is applied through number 4 test cock and the gauge reading drops to the
relief valve opening point. How do you proceed?.
Answer: Bleed water through the low side of the gauge to a reading above
the apparent.
◍ While field testing the first check valve of a double check valve assembly,
the water in the site tubes recedes. What does this imply?.
Answer: Check valve number 2 and shut off valve number 2 leak.
◍ While field testing the second check valve of a double check valve
assembly, water continues to flow from the sight tube. You open the bleed
off valve and a small amount of water comes out of the bleed off valve and
then stops. The gauge reading goes to zero and water continues to flow from
the sight tube. What does this imply?.
Answer: Shut off valve number two leaks with back pressure
1,2,3,4,5,6,7,8,&15] (IRSC) FINAL
TEST 2026 QUESTIONS WITH
CORRECT ANSWERS GRADED A+
◍ A local ordinance establishing a cross-connection control program must
require that.
Answer: a certified tester test the assembly at least once each year and report
the test results to the waterauthority in a timely manner
◍ While field testing the check valve of a pressure vacuum breaker, water
continues to flow from the # 2 test cock . How do you proceed ?.
Answer: Open the bleed off valve until the flow slows to a slight drip.
◍ Well field testing the first check valve of a double check valve assembly,
water continues to flow from the site tube. How do you proceed?.
Answer: Observe reading on gauge (first step). Open high side of bleed
valve (second step).
◍ An approved air gap used for backflow prevention shall be.
Answer: a vertical dimension of at least twice the diameter of the supply
pipe and but in no case less thanone inch above the overflow rim
◍ While field testing the check valve of a spill resistant pressure vacuum
breaker, water continues to flow from the vent valve. What does this imply?.
Answer: Number 1 shut off valve is leaking.
◍ The proper location for a backflow prevention assembly for the protection of
a service connection is:.
Answer: in an above grade, protected and accessible site and before any
Tees in the service line
,◍ If water is continuously flowing from the relief valve port of a reduced
pressure principle backflow prevention assembly the person testing the
assembly could report:.
Answer: the first check may be fouled; or the relief valve may have
malfunctioned; or the second check isfouled with backpressure on the
assembly
◍ While field testing the differential pressure relief valve opening point of RP,
it is found that the shut - off valve # 2 is leaking . How should the temporary
bypass hose be connected to compensate for the leak?.
Answer: Test cock # 1 to test cock # 4
◍ While field testing the second check valve of a reduced pressure principle
assembly, high side pressure is applied through test cock # 4 and the gage
reading begins to increase. How do you proceed?.
Answer: Close the # 2 test cock.
◍ While field testing the differential pressure relief valve opening point of an
RP, the high side control needle valve is open, and the low side control
needle valve is open 1/4 turn, however the reading on the gauge will not
lower to the relief valve opening point. What does this imply?.
Answer: Number 2 shut off valve is leaking
◍ What are acceptable field test readings for a properly operating double
check valve assembly?.
Answer: Check valve number 1: 1.0 PSID and above/ check valve number 2:
1.0 P ID and above
◍ Backpressure will cause backflow:.
Answer: through an unprotected feed to a closed make-up water tank
◍ When testing an RP, upon closing the number 2 shut off valve and the high
and low side bleed valves, the gauge reading drops and differential pressure
relief valve begins to discharge. How do you proceed?.
Answer: Record the number 1 check valve is leaking and end the test.
, ◍ While field testing the number 1 check valve of a DC, water continues to
flow from the site tube. What is most likely to be the cause of this situation?.
Answer: Shut off valve #1 one is leaking.
◍ While field testing the differential pressure relief valve of the RP, what
gauge reading indicates a failure?.
Answer: Less than 2.0 PSID
◍ While field testing the air inlet valve of a pressure vacuum breaker, the high
side bleed valve is opened 1/4 turn and the gauge reading will not drop.
How do you proceed?.
Answer: Close the high side bleed valve, then open the number 1 test cock.
◍ The primary responsibility for requiring the testing, maintenance and
reporting on service protection backflow prevention assemblies is normally
vested in the:.
Answer: Water Purveyor
◍ In testing a reduced pressure principle backflow prevention assembly.
Answer: the relief valve must be tested first
◍ While field testing the second check valve of an RP, the high side pressure
is applied through number 4 test cock and the gauge reading drops to the
relief valve opening point. How do you proceed?.
Answer: Bleed water through the low side of the gauge to a reading above
the apparent.
◍ While field testing the first check valve of a double check valve assembly,
the water in the site tubes recedes. What does this imply?.
Answer: Check valve number 2 and shut off valve number 2 leak.
◍ While field testing the second check valve of a double check valve
assembly, water continues to flow from the sight tube. You open the bleed
off valve and a small amount of water comes out of the bleed off valve and
then stops. The gauge reading goes to zero and water continues to flow from
the sight tube. What does this imply?.
Answer: Shut off valve number two leaks with back pressure
