Texas Irrigation Inspector Examination
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. What is the primary responsibility of a Texas Irrigation Inspector?
A. Designing irrigation systems
B. Selling irrigation equipment
C. Inspecting irrigation systems for compliance with applicable laws, rules, and
standards
D. Repairing irrigation controllers
Answer: Inspecting irrigation systems for compliance with applicable laws, rules,
and standards
Rationale: The inspector's primary duty is to verify that irrigation systems
comply with Texas laws, TCEQ regulations, and adopted standards before
approval.
2. Which agency regulates landscape irrigation in Texas?
,A. Texas Department of Agriculture
B. Texas Department of Licensing and Regulation
C. Texas Commission on Environmental Quality (TCEQ)
D. Texas Water Development Board
Answer: Texas Commission on Environmental Quality (TCEQ)
Rationale: TCEQ administers the Texas Landscape Irrigation Program and
oversees licensing and regulatory compliance.
3. What is the primary purpose of a backflow prevention assembly?
A. Increase water pressure
B. Filter sediment
C. Prevent contaminated water from entering the potable water supply
D. Reduce water temperature
Answer: Prevent contaminated water from entering the potable water supply
Rationale: Backflow prevention assemblies protect drinking water from
contamination caused by backflow events.
4. What does "backflow" mean?
A. Increased pressure in pipes
B. Reverse flow of water into the potable supply
C. Water flowing downhill
D. Pump failure
Answer: Reverse flow of water into the potable supply
Rationale: Backflow occurs whenever water reverses direction and may
introduce contaminants into the public water system.
, 5. Which condition causes backsiphonage?
A. High downstream pressure
B. Negative pressure in the water supply
C. Elevated storage tanks
D. Excess irrigation flow
Answer: Negative pressure in the water supply
Rationale: Backsiphonage occurs when supply pressure falls below atmospheric
pressure, creating suction.
6. Which condition causes backpressure?
A. Vacuum breaker failure
B. Low irrigation demand
C. Downstream pressure exceeding supply pressure
D. Closed control valve
Answer: Downstream pressure exceeding supply pressure
Rationale: Backpressure forces water backward into the potable supply when
downstream pressure becomes greater than supply pressure.
7. Which device protects against backsiphonage only?
A. RPZ Assembly
B. Double Check Valve Assembly
C. Atmospheric Vacuum Breaker
D. Pressure Reducing Valve
Answer: Atmospheric Vacuum Breaker
Rationale: Atmospheric vacuum breakers protect only against backsiphonage
and not backpressure.
, 8. Which assembly provides the highest level of protection?
A. Double Check Valve Assembly
B. Pressure Vacuum Breaker
C. Dual Check Valve
D. Reduced Pressure Principle Backflow Prevention Assembly
Answer: Reduced Pressure Principle Backflow Prevention Assembly
Rationale: RP assemblies protect against both backsiphonage and backpressure
involving high hazards.
9. What should an inspector verify before approving an irrigation installation?
A. Color of controller enclosure
B. Manufacturer warranty
C. Compliance with applicable codes and standards
D. Retail cost of materials
Answer: Compliance with applicable codes and standards
Rationale: Compliance with regulations is the primary concern during
inspections.
10.What is cross-connection?
A. Two sprinkler heads on one pipe
B. Any physical connection between potable and non-potable water systems
C. Joining PVC fittings
D. Connecting valves together
Answer: Any physical connection between potable and non-potable water
systems
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. What is the primary responsibility of a Texas Irrigation Inspector?
A. Designing irrigation systems
B. Selling irrigation equipment
C. Inspecting irrigation systems for compliance with applicable laws, rules, and
standards
D. Repairing irrigation controllers
Answer: Inspecting irrigation systems for compliance with applicable laws, rules,
and standards
Rationale: The inspector's primary duty is to verify that irrigation systems
comply with Texas laws, TCEQ regulations, and adopted standards before
approval.
2. Which agency regulates landscape irrigation in Texas?
,A. Texas Department of Agriculture
B. Texas Department of Licensing and Regulation
C. Texas Commission on Environmental Quality (TCEQ)
D. Texas Water Development Board
Answer: Texas Commission on Environmental Quality (TCEQ)
Rationale: TCEQ administers the Texas Landscape Irrigation Program and
oversees licensing and regulatory compliance.
3. What is the primary purpose of a backflow prevention assembly?
A. Increase water pressure
B. Filter sediment
C. Prevent contaminated water from entering the potable water supply
D. Reduce water temperature
Answer: Prevent contaminated water from entering the potable water supply
Rationale: Backflow prevention assemblies protect drinking water from
contamination caused by backflow events.
4. What does "backflow" mean?
A. Increased pressure in pipes
B. Reverse flow of water into the potable supply
C. Water flowing downhill
D. Pump failure
Answer: Reverse flow of water into the potable supply
Rationale: Backflow occurs whenever water reverses direction and may
introduce contaminants into the public water system.
, 5. Which condition causes backsiphonage?
A. High downstream pressure
B. Negative pressure in the water supply
C. Elevated storage tanks
D. Excess irrigation flow
Answer: Negative pressure in the water supply
Rationale: Backsiphonage occurs when supply pressure falls below atmospheric
pressure, creating suction.
6. Which condition causes backpressure?
A. Vacuum breaker failure
B. Low irrigation demand
C. Downstream pressure exceeding supply pressure
D. Closed control valve
Answer: Downstream pressure exceeding supply pressure
Rationale: Backpressure forces water backward into the potable supply when
downstream pressure becomes greater than supply pressure.
7. Which device protects against backsiphonage only?
A. RPZ Assembly
B. Double Check Valve Assembly
C. Atmospheric Vacuum Breaker
D. Pressure Reducing Valve
Answer: Atmospheric Vacuum Breaker
Rationale: Atmospheric vacuum breakers protect only against backsiphonage
and not backpressure.
, 8. Which assembly provides the highest level of protection?
A. Double Check Valve Assembly
B. Pressure Vacuum Breaker
C. Dual Check Valve
D. Reduced Pressure Principle Backflow Prevention Assembly
Answer: Reduced Pressure Principle Backflow Prevention Assembly
Rationale: RP assemblies protect against both backsiphonage and backpressure
involving high hazards.
9. What should an inspector verify before approving an irrigation installation?
A. Color of controller enclosure
B. Manufacturer warranty
C. Compliance with applicable codes and standards
D. Retail cost of materials
Answer: Compliance with applicable codes and standards
Rationale: Compliance with regulations is the primary concern during
inspections.
10.What is cross-connection?
A. Two sprinkler heads on one pipe
B. Any physical connection between potable and non-potable water systems
C. Joining PVC fittings
D. Connecting valves together
Answer: Any physical connection between potable and non-potable water
systems
