GEORGIA BACKFLOW SYSTEM REPAIR TECHNICIAN EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*Core Domains:*
*1. Cross-Connection Control Theory*
*2. Hydraulics and Fluid Mechanics*
*3. Backflow Prevention Assemblies*
*4. Troubleshooting and Diagnostics*
*5. Repair and Maintenance Procedures*
*6. Georgia Rules and Regulations*
*7. Codes and Safety Standards*
*8. Professional Ethics and Practice*
*Introduction*
The Georgia Backflow System Repair Technician Exam Assessment is designed to evaluate a candidate's
mastery of cross-connection control principles, assembly operations, and troubleshooting methodologies.
This comprehensive test bank assesses critical knowledge required to protect public health by preventing
water system contamination. Through a mix of foundational theory, regulatory compliance, and real-world
repair scenarios, this examination ensures technicians possess advanced decision-making skills.
Candidates are challenged to diagnose failures, select proper repair strategies, and apply state
regulations across diverse mechanical configurations, establishing a high standard of professional
competency and ethical responsibility in water system maintenance.
SECTION ONE: QUESTIONS 1–100
,Question 1
What is the minimum pressure differential required across the first check valve of a Reduced Pressure
Principle (RPZ) assembly during normal operation?
A. 1.0 psid
B. 2.0 psid
C. 3.0 psid
D. 5.0 psid
🟢 B. 2.0 psid
🔴 RATIONALE: The first check valve in an RPZ must maintain a minimum pressure drop of 2.0 psid to
ensure that the relief valve zone remains lower in pressure than the supply zone.
Question 2
Which backflow condition is driven by a drop in supply pressure below atmospheric pressure?
A. Backpressure
B. Back-siphonage
C. Thermal expansion
D. Hydrostatic lock
🟢 B. Back-siphonage
🔴 RATIONALE: Back-siphonage occurs specifically when negative or sub-atmospheric pressure in the
supply system creates a vacuum effect that pulls non-potable water into the potable supply.
Question 3
A technician notes that an RPZ relief valve continuously spits water during a period of fluctuating supply
pressure. What is the most likely cause?
A. Leaking second check valve
B. Surcharged water main
C. Pressure fluctuations with a faulty or fouled first check valve
D. High downstream demand
🟢 C. Pressure fluctuations with a faulty or fouled first check valve
,🔴 RATIONALE: Supply line pressure fluctuations combined with a sluggish or slightly fouled first check
valve cause the intermediate zone pressure to periodically exceed supply pressure, triggering relief valve
discharge.
Question 4
According to Georgia rules, what action must a repair technician take immediately after completing repairs
on a backflow prevention assembly?
A. File an extension with the environmental health office
B. Notify the property owner that testing can be bypassed for the year
C. Perform a certified field test to ensure proper operation
D. Apply a temporary seal coat to the assembly body
🟢 C. Perform a certified field test to ensure proper operation
🔴 RATIONALE: Any time an assembly is opened, repaired, or altered, it must immediately undergo a
certified field test to verify it meets operational standards before being put back into service.
Question 5
What type of protection is an Atmospheric Vacuum Breaker (AVB) approved for?
A. High hazard cross-connections subject to continuous pressure
B. Low hazard cross-connections subject to backpressure only
C. High or low hazard cross-connections not subject to continuous pressure or backpressure
D. Continuous pressure systems only
🟢 C. High or low hazard cross-connections not subject to continuous pressure or backpressure
🔴 RATIONALE: AVBs cannot be subjected to continuous pressure (more than 12 hours out of a 24-hour
period) or backpressure, but they are rated for both high and low hazards.
Question 6
During a field test on a Double Check Valve Assembly (DCVA), check valve number 1 leaks. How will this
be indicated on the differential pressure gauge?
A. The gauge reading will rise above 5.0 psid
B. The gauge reading will drop to 0 psid or fail to hold pressure
, C. The gauge will fluctuate violently
D. The needle will lock at maximum scale
🟢 B. The gauge reading will drop to 0 psid or fail to hold pressure
🔴 RATIONALE: A leaking first check valve cannot maintain a pressure differential when flow is stopped,
causing the gauge reading to drop toward zero.
Question 7
What is the primary function of the air inlet valve inside a Pressure Vacuum Breaker (PVB)?
A. To permit water to drain out during high-pressure events
B. To allow atmospheric air to enter and break a vacuum if supply pressure drops
C. To vent trapped air during initial filling operations
D. To regulate downstream flow volume
🟢 B. To allow atmospheric air to enter and break a vacuum if supply pressure drops
🔴 RATIONALE: The air inlet valve opens when internal pressure falls near atmospheric, allowing air to
break the vacuum and prevent back-siphonage.
Question 8
Which parameter determines whether a substance is classified as a "high hazard" under cross-connection
control rules?
A. The volume of the substance available
B. The toxicological potential to cause illness or death
C. The temperature of the fluid
D. The aesthetic discoloration of the water
🟢 B. The toxicological potential to cause illness or death
🔴 RATIONALE: High hazard refers specifically to a substance that introduces a contaminant capable of
causing a health hazard or death if introduced into the potable water supply.
Question 9
If a technician uses an improper tool that damages the machined seat of a check valve during repair, what
is the best corrective action?
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*Core Domains:*
*1. Cross-Connection Control Theory*
*2. Hydraulics and Fluid Mechanics*
*3. Backflow Prevention Assemblies*
*4. Troubleshooting and Diagnostics*
*5. Repair and Maintenance Procedures*
*6. Georgia Rules and Regulations*
*7. Codes and Safety Standards*
*8. Professional Ethics and Practice*
*Introduction*
The Georgia Backflow System Repair Technician Exam Assessment is designed to evaluate a candidate's
mastery of cross-connection control principles, assembly operations, and troubleshooting methodologies.
This comprehensive test bank assesses critical knowledge required to protect public health by preventing
water system contamination. Through a mix of foundational theory, regulatory compliance, and real-world
repair scenarios, this examination ensures technicians possess advanced decision-making skills.
Candidates are challenged to diagnose failures, select proper repair strategies, and apply state
regulations across diverse mechanical configurations, establishing a high standard of professional
competency and ethical responsibility in water system maintenance.
SECTION ONE: QUESTIONS 1–100
,Question 1
What is the minimum pressure differential required across the first check valve of a Reduced Pressure
Principle (RPZ) assembly during normal operation?
A. 1.0 psid
B. 2.0 psid
C. 3.0 psid
D. 5.0 psid
🟢 B. 2.0 psid
🔴 RATIONALE: The first check valve in an RPZ must maintain a minimum pressure drop of 2.0 psid to
ensure that the relief valve zone remains lower in pressure than the supply zone.
Question 2
Which backflow condition is driven by a drop in supply pressure below atmospheric pressure?
A. Backpressure
B. Back-siphonage
C. Thermal expansion
D. Hydrostatic lock
🟢 B. Back-siphonage
🔴 RATIONALE: Back-siphonage occurs specifically when negative or sub-atmospheric pressure in the
supply system creates a vacuum effect that pulls non-potable water into the potable supply.
Question 3
A technician notes that an RPZ relief valve continuously spits water during a period of fluctuating supply
pressure. What is the most likely cause?
A. Leaking second check valve
B. Surcharged water main
C. Pressure fluctuations with a faulty or fouled first check valve
D. High downstream demand
🟢 C. Pressure fluctuations with a faulty or fouled first check valve
,🔴 RATIONALE: Supply line pressure fluctuations combined with a sluggish or slightly fouled first check
valve cause the intermediate zone pressure to periodically exceed supply pressure, triggering relief valve
discharge.
Question 4
According to Georgia rules, what action must a repair technician take immediately after completing repairs
on a backflow prevention assembly?
A. File an extension with the environmental health office
B. Notify the property owner that testing can be bypassed for the year
C. Perform a certified field test to ensure proper operation
D. Apply a temporary seal coat to the assembly body
🟢 C. Perform a certified field test to ensure proper operation
🔴 RATIONALE: Any time an assembly is opened, repaired, or altered, it must immediately undergo a
certified field test to verify it meets operational standards before being put back into service.
Question 5
What type of protection is an Atmospheric Vacuum Breaker (AVB) approved for?
A. High hazard cross-connections subject to continuous pressure
B. Low hazard cross-connections subject to backpressure only
C. High or low hazard cross-connections not subject to continuous pressure or backpressure
D. Continuous pressure systems only
🟢 C. High or low hazard cross-connections not subject to continuous pressure or backpressure
🔴 RATIONALE: AVBs cannot be subjected to continuous pressure (more than 12 hours out of a 24-hour
period) or backpressure, but they are rated for both high and low hazards.
Question 6
During a field test on a Double Check Valve Assembly (DCVA), check valve number 1 leaks. How will this
be indicated on the differential pressure gauge?
A. The gauge reading will rise above 5.0 psid
B. The gauge reading will drop to 0 psid or fail to hold pressure
, C. The gauge will fluctuate violently
D. The needle will lock at maximum scale
🟢 B. The gauge reading will drop to 0 psid or fail to hold pressure
🔴 RATIONALE: A leaking first check valve cannot maintain a pressure differential when flow is stopped,
causing the gauge reading to drop toward zero.
Question 7
What is the primary function of the air inlet valve inside a Pressure Vacuum Breaker (PVB)?
A. To permit water to drain out during high-pressure events
B. To allow atmospheric air to enter and break a vacuum if supply pressure drops
C. To vent trapped air during initial filling operations
D. To regulate downstream flow volume
🟢 B. To allow atmospheric air to enter and break a vacuum if supply pressure drops
🔴 RATIONALE: The air inlet valve opens when internal pressure falls near atmospheric, allowing air to
break the vacuum and prevent back-siphonage.
Question 8
Which parameter determines whether a substance is classified as a "high hazard" under cross-connection
control rules?
A. The volume of the substance available
B. The toxicological potential to cause illness or death
C. The temperature of the fluid
D. The aesthetic discoloration of the water
🟢 B. The toxicological potential to cause illness or death
🔴 RATIONALE: High hazard refers specifically to a substance that introduces a contaminant capable of
causing a health hazard or death if introduced into the potable water supply.
Question 9
If a technician uses an improper tool that damages the machined seat of a check valve during repair, what
is the best corrective action?
