AWWA Cross-Connection Control
Specialist Certification Practice Exam
2026| 250 Most Tested Questions
Collection & Verified Detailed Answers |
Tutor Verified Success Exam) Graded A+
1. What is a cross-connection?
A. A connection between two potable water mains
B. A physical or potential connection between a potable water
system and a source of contamination
C. A connection between two fire hydrants
D. A connection between two water meters
Answer: B. A physical or potential connection between a potable
water system and a source of contamination
Rationale: A cross-connection creates a pathway through which a
contaminant or pollutant could enter the potable water supply.
2. What is backflow?
A. Normal downstream water flow
B. Flow of water from a treatment plant to a distribution system
C. Reverse flow from a customer's plumbing or another source
toward the potable water supply
D. Flow through a pressure-reducing valve
Answer: C. Reverse flow from a customer's plumbing or another
source toward the potable water supply
Rationale: Backflow occurs when water or another substance moves
in the reverse direction from its intended flow.
,3. The primary purpose of a cross-connection-control program is to:
A. Increase water pressure
B. Reduce water consumption
C. Protect potable water from contamination or pollution
D. Eliminate the need for plumbing inspections
Answer: C. Protect potable water from contamination or pollution
Rationale: Cross-connection control is fundamentally a public-health
protection program.
4. Backflow can occur because of:
A. Only high downstream pressure
B. Only low supply pressure
C. Either backpressure or backsiphonage
D. Only water hammer
Answer: C. Either backpressure or backsiphonage
Rationale: Backpressure occurs when downstream pressure exceeds
supply pressure; backsiphonage occurs when supply pressure falls
below downstream atmospheric or other pressure.
5. What condition causes backsiphonage?
A. Increased distribution pressure
B. Negative or sub-atmospheric pressure in the potable supply
C. Excessive downstream pressure
D. Increased reservoir level
Answer: B. Negative or sub-atmospheric pressure in the potable
supply
Rationale: A vacuum or reduced pressure can create a siphoning
action that draws nonpotable water toward the potable system.
6. Which situation is most likely to create backsiphonage?
,A. A booster pump increasing pressure on the customer side
B. A potable water main break causing a pressure drop
C. A pressure-reducing valve increasing downstream pressure
D. A closed irrigation valve
Answer: B. A potable water main break causing a pressure drop
Rationale: A major main break can cause local pressure to become
very low or negative, creating backsiphonage conditions.
7. Backpressure occurs when:
A. Supply pressure is greater than downstream pressure
B. Downstream pressure exceeds potable supply pressure
C. Atmospheric pressure exceeds water pressure
D. A water meter stops rotating
Answer: B. Downstream pressure exceeds potable supply pressure
Rationale: Any downstream source capable of producing pressure
greater than the potable supply can force flow backward.
8. Which is an example of a potential backpressure source?
A. Gravity-fed hose bibb
B. Elevated storage tank connected to the potable system
C. Boiler operating above supply pressure
D. Open atmospheric drain
Answer: C. Boiler operating above supply pressure
Rationale: Boilers and other pressurized systems can develop
pressures exceeding the potable supply pressure.
9. A substance that could adversely affect public health is generally
classified as a:
A. Nonhazardous substance
B. Contaminant
, C. Hydraulic gradient
D. Potable source
Answer: B. Contaminant
Rationale: A contaminant can create a health concern if introduced
into drinking water.
10. A substance that may affect water quality, but is not necessarily
a direct health threat, is commonly considered a:
A. Pollutant
B. Vacuum breaker
C. Reduced-pressure zone
D. Air gap
Answer: A. Pollutant
Rationale: Cross-connection programs distinguish between health
hazards and substances that primarily affect aesthetic or other
water-quality characteristics.
11. The best general approach to cross-connection control is to:
A. Assume customers will prevent backflow themselves
B. Identify hazards and provide protection appropriate to the hazard
C. Install the same device everywhere
D. Eliminate all customer plumbing
Answer: B. Identify hazards and provide protection appropriate to
the hazard
Rationale: Effective programs are risk-based and match protection to
the hazard and hydraulic conditions.
12. Which organization describes cross-connection control as an
ongoing responsibility of water utilities or responsible authorities?
A. AWWA
B. OSHA only
Specialist Certification Practice Exam
2026| 250 Most Tested Questions
Collection & Verified Detailed Answers |
Tutor Verified Success Exam) Graded A+
1. What is a cross-connection?
A. A connection between two potable water mains
B. A physical or potential connection between a potable water
system and a source of contamination
C. A connection between two fire hydrants
D. A connection between two water meters
Answer: B. A physical or potential connection between a potable
water system and a source of contamination
Rationale: A cross-connection creates a pathway through which a
contaminant or pollutant could enter the potable water supply.
2. What is backflow?
A. Normal downstream water flow
B. Flow of water from a treatment plant to a distribution system
C. Reverse flow from a customer's plumbing or another source
toward the potable water supply
D. Flow through a pressure-reducing valve
Answer: C. Reverse flow from a customer's plumbing or another
source toward the potable water supply
Rationale: Backflow occurs when water or another substance moves
in the reverse direction from its intended flow.
,3. The primary purpose of a cross-connection-control program is to:
A. Increase water pressure
B. Reduce water consumption
C. Protect potable water from contamination or pollution
D. Eliminate the need for plumbing inspections
Answer: C. Protect potable water from contamination or pollution
Rationale: Cross-connection control is fundamentally a public-health
protection program.
4. Backflow can occur because of:
A. Only high downstream pressure
B. Only low supply pressure
C. Either backpressure or backsiphonage
D. Only water hammer
Answer: C. Either backpressure or backsiphonage
Rationale: Backpressure occurs when downstream pressure exceeds
supply pressure; backsiphonage occurs when supply pressure falls
below downstream atmospheric or other pressure.
5. What condition causes backsiphonage?
A. Increased distribution pressure
B. Negative or sub-atmospheric pressure in the potable supply
C. Excessive downstream pressure
D. Increased reservoir level
Answer: B. Negative or sub-atmospheric pressure in the potable
supply
Rationale: A vacuum or reduced pressure can create a siphoning
action that draws nonpotable water toward the potable system.
6. Which situation is most likely to create backsiphonage?
,A. A booster pump increasing pressure on the customer side
B. A potable water main break causing a pressure drop
C. A pressure-reducing valve increasing downstream pressure
D. A closed irrigation valve
Answer: B. A potable water main break causing a pressure drop
Rationale: A major main break can cause local pressure to become
very low or negative, creating backsiphonage conditions.
7. Backpressure occurs when:
A. Supply pressure is greater than downstream pressure
B. Downstream pressure exceeds potable supply pressure
C. Atmospheric pressure exceeds water pressure
D. A water meter stops rotating
Answer: B. Downstream pressure exceeds potable supply pressure
Rationale: Any downstream source capable of producing pressure
greater than the potable supply can force flow backward.
8. Which is an example of a potential backpressure source?
A. Gravity-fed hose bibb
B. Elevated storage tank connected to the potable system
C. Boiler operating above supply pressure
D. Open atmospheric drain
Answer: C. Boiler operating above supply pressure
Rationale: Boilers and other pressurized systems can develop
pressures exceeding the potable supply pressure.
9. A substance that could adversely affect public health is generally
classified as a:
A. Nonhazardous substance
B. Contaminant
, C. Hydraulic gradient
D. Potable source
Answer: B. Contaminant
Rationale: A contaminant can create a health concern if introduced
into drinking water.
10. A substance that may affect water quality, but is not necessarily
a direct health threat, is commonly considered a:
A. Pollutant
B. Vacuum breaker
C. Reduced-pressure zone
D. Air gap
Answer: A. Pollutant
Rationale: Cross-connection programs distinguish between health
hazards and substances that primarily affect aesthetic or other
water-quality characteristics.
11. The best general approach to cross-connection control is to:
A. Assume customers will prevent backflow themselves
B. Identify hazards and provide protection appropriate to the hazard
C. Install the same device everywhere
D. Eliminate all customer plumbing
Answer: B. Identify hazards and provide protection appropriate to
the hazard
Rationale: Effective programs are risk-based and match protection to
the hazard and hydraulic conditions.
12. Which organization describes cross-connection control as an
ongoing responsibility of water utilities or responsible authorities?
A. AWWA
B. OSHA only
