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Texas Water Supply Protection
Specialist Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of a cross-connection control program?
A. Increase water pressure
B. Reduce water costs
C. Protect the public water supply from contamination and pollution
D. Improve wastewater treatment
Rationale: Cross-connection control programs prevent contaminants and
pollutants from entering potable water systems through backflow incidents.
2. What is backflow?
A. Water flowing uphill naturally
B. The unwanted reversal of water flow in a potable water system
C. Water flowing into a storage tank
D. Water leaking from a pipe
Rationale: Backflow is the reverse flow of water that can introduce
contaminants into the drinking water supply.
3. Which condition causes backsiphonage?
,A. High system pressure
B. Booster pump operation
C. Negative pressure in the supply line
D. Elevated storage tanks
Rationale: Backsiphonage occurs when the supply pressure drops below
atmospheric pressure, creating a vacuum.
4. Which condition commonly causes backpressure?
A. Water main breaks
B. Fire hydrant use
C. A downstream pressure exceeding supply pressure
D. Gravity drainage
Rationale: Backpressure occurs when pressure on the customer's side exceeds
the public water supply pressure.
5. Which backflow prevention assembly provides the highest level of
protection?
A. Atmospheric Vacuum Breaker
B. Pressure Vacuum Breaker
C. Double Check Valve Assembly
D. Reduced Pressure Principle Backflow Prevention Assembly
Rationale: An RP assembly protects against both health and non-health hazards
under backsiphonage and backpressure conditions.
6. Which device is approved only for backsiphonage protection?
A. Double Check Valve Assembly
B. Reduced Pressure Principle Assembly
C. Atmospheric Vacuum Breaker
D. Detector Check Assembly
Rationale: Atmospheric vacuum breakers protect only against backsiphonage
and cannot protect against backpressure.
, 7. What is a cross connection?
A. A water meter connection
B. Any actual or potential connection between potable and non-potable systems
C. A service line connection
D. A pipe union
Rationale: Cross connections create the potential for contamination of drinking
water.
8. A contaminant is best defined as:
A. Any visible sediment
B. A substance that could affect water quality or safety
C. Clean groundwater
D. Water treatment chemicals
Rationale: Contaminants include biological, chemical, or physical substances
that degrade water quality.
9. Pollution differs from contamination because pollution:
A. Always causes illness
B. Generally affects water quality without creating an actual health hazard
C. Is always visible
D. Only occurs outdoors
Rationale: Pollution affects aesthetic quality, while contamination creates an
actual health hazard.
10.Which organization publishes standards for backflow prevention
assemblies?
A. EPA only
B. ASSE International
C. OSHA only
D. FEMA
Texas Water Supply Protection
Specialist Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of a cross-connection control program?
A. Increase water pressure
B. Reduce water costs
C. Protect the public water supply from contamination and pollution
D. Improve wastewater treatment
Rationale: Cross-connection control programs prevent contaminants and
pollutants from entering potable water systems through backflow incidents.
2. What is backflow?
A. Water flowing uphill naturally
B. The unwanted reversal of water flow in a potable water system
C. Water flowing into a storage tank
D. Water leaking from a pipe
Rationale: Backflow is the reverse flow of water that can introduce
contaminants into the drinking water supply.
3. Which condition causes backsiphonage?
,A. High system pressure
B. Booster pump operation
C. Negative pressure in the supply line
D. Elevated storage tanks
Rationale: Backsiphonage occurs when the supply pressure drops below
atmospheric pressure, creating a vacuum.
4. Which condition commonly causes backpressure?
A. Water main breaks
B. Fire hydrant use
C. A downstream pressure exceeding supply pressure
D. Gravity drainage
Rationale: Backpressure occurs when pressure on the customer's side exceeds
the public water supply pressure.
5. Which backflow prevention assembly provides the highest level of
protection?
A. Atmospheric Vacuum Breaker
B. Pressure Vacuum Breaker
C. Double Check Valve Assembly
D. Reduced Pressure Principle Backflow Prevention Assembly
Rationale: An RP assembly protects against both health and non-health hazards
under backsiphonage and backpressure conditions.
6. Which device is approved only for backsiphonage protection?
A. Double Check Valve Assembly
B. Reduced Pressure Principle Assembly
C. Atmospheric Vacuum Breaker
D. Detector Check Assembly
Rationale: Atmospheric vacuum breakers protect only against backsiphonage
and cannot protect against backpressure.
, 7. What is a cross connection?
A. A water meter connection
B. Any actual or potential connection between potable and non-potable systems
C. A service line connection
D. A pipe union
Rationale: Cross connections create the potential for contamination of drinking
water.
8. A contaminant is best defined as:
A. Any visible sediment
B. A substance that could affect water quality or safety
C. Clean groundwater
D. Water treatment chemicals
Rationale: Contaminants include biological, chemical, or physical substances
that degrade water quality.
9. Pollution differs from contamination because pollution:
A. Always causes illness
B. Generally affects water quality without creating an actual health hazard
C. Is always visible
D. Only occurs outdoors
Rationale: Pollution affects aesthetic quality, while contamination creates an
actual health hazard.
10.Which organization publishes standards for backflow prevention
assemblies?
A. EPA only
B. ASSE International
C. OSHA only
D. FEMA
