AWWA CROSS-CONNECTION CONTROL SPECIALIST
EXAM 1 WITH 200 QUESTIONS AND ANSWERS WITH
RATIONALES
This comprehensive practice exam bank is specifically designed
to help you pass the AWWA Cross-Connection Control Specialist
certification on your first attempt. Every question features a
verified multiple-choice answer formatted in clean italics
alongside an in-depth, bold-italicized technical rationale that
explains exactly why the answer is correct. It covers critical
exam pillars including hydraulic principles, RPZ/DCVA/PVB
assembly testing protocols, hazard classifications, and
containment regulations.
1. Which of the following is defined as any actual
or potential connection between a potable
water system and any source of contamination?
A) Cross-connection
B) Backflow
C) Backsiphonage
D) Interconnection
Answer: A) Cross-connection
Rationale: A cross-connection is the physical
point where a public water supply connects to a
non-potable source, creating a risk of
contamination.
,2. What type of backflow is caused by a negative
or sub-atmospheric pressure within the water
supply system?
A) Backpressure
B) Backsiphonage
C) Thermal expansion
D) Hydraulic jump
Answer: B) Backsiphonage
Rationale: Backsiphonage occurs specifically
when the pressure in the supply line drops
below atmospheric pressure, causing water to
be sucked backward.
3. A cross-connection control specialist evaluates
a facility where the supply pressure exceeds
the downstream pressure. If downstream
pressure later rises above the supply pressure,
what occurs?
A) Backsiphonage
B) Backpressure
C) Venturi effect
D) Aspirator effect
Answer: B) Backpressure
Rationale: Backpressure happens when the
downstream pressure becomes greater than
, the supply pressure, forcing fluids backward
into the potable system.
4. Which backflow preventer is approved for use
against both backpressure and backsiphonage
under high-hazard conditions?
A) Double Check Valve Assembly (DCVA)
B) Pressure Vacuum Breaker (PVB)
C) Reduced Pressure Principle Backflow
Preventer (RP)
D) Atmospheric Vacuum Breaker (AVB)
Answer: C) Reduced Pressure Principle
Backflow Preventer (RP)
Rationale: The RP assembly offers the highest
level of mechanical protection and is approved
for high-hazard situations involving both
backpressure and backsiphonage.
5. An Atmospheric Vacuum Breaker (AVB) must
be installed a minimum of how many inches
above the highest downstream piping or
overflow rim?
A) 2 inches
B) 6 inches
C) 12 inches
D) 18 inches
, Answer: B) 6 inches
Rationale: Plumbing codes and AWWA
standards mandate that an AVB must be
installed at least 6 inches above the highest
point of downstream usage to function
correctly.
6. Which device cannot be subjected to continuous
water pressure for more than 12 hours in a 24-
hour period?
A) Reduced Pressure Principle Assembly
B) Double Check Valve Assembly
C) Atmospheric Vacuum Breaker
D) Pressure Vacuum Breaker
Answer: C) Atmospheric Vacuum Breaker
Rationale: AVBs are designed for non-
continuous pressure applications. Continuous
pressure will cause the internal air-inlet valve
to stick shut, rendering it useless.
7. What is the minimum clearance required
between the relief valve discharge port of an RP
assembly and the floor or grade?
A) 6 inches
B) 12 inches
C) 18 inches
EXAM 1 WITH 200 QUESTIONS AND ANSWERS WITH
RATIONALES
This comprehensive practice exam bank is specifically designed
to help you pass the AWWA Cross-Connection Control Specialist
certification on your first attempt. Every question features a
verified multiple-choice answer formatted in clean italics
alongside an in-depth, bold-italicized technical rationale that
explains exactly why the answer is correct. It covers critical
exam pillars including hydraulic principles, RPZ/DCVA/PVB
assembly testing protocols, hazard classifications, and
containment regulations.
1. Which of the following is defined as any actual
or potential connection between a potable
water system and any source of contamination?
A) Cross-connection
B) Backflow
C) Backsiphonage
D) Interconnection
Answer: A) Cross-connection
Rationale: A cross-connection is the physical
point where a public water supply connects to a
non-potable source, creating a risk of
contamination.
,2. What type of backflow is caused by a negative
or sub-atmospheric pressure within the water
supply system?
A) Backpressure
B) Backsiphonage
C) Thermal expansion
D) Hydraulic jump
Answer: B) Backsiphonage
Rationale: Backsiphonage occurs specifically
when the pressure in the supply line drops
below atmospheric pressure, causing water to
be sucked backward.
3. A cross-connection control specialist evaluates
a facility where the supply pressure exceeds
the downstream pressure. If downstream
pressure later rises above the supply pressure,
what occurs?
A) Backsiphonage
B) Backpressure
C) Venturi effect
D) Aspirator effect
Answer: B) Backpressure
Rationale: Backpressure happens when the
downstream pressure becomes greater than
, the supply pressure, forcing fluids backward
into the potable system.
4. Which backflow preventer is approved for use
against both backpressure and backsiphonage
under high-hazard conditions?
A) Double Check Valve Assembly (DCVA)
B) Pressure Vacuum Breaker (PVB)
C) Reduced Pressure Principle Backflow
Preventer (RP)
D) Atmospheric Vacuum Breaker (AVB)
Answer: C) Reduced Pressure Principle
Backflow Preventer (RP)
Rationale: The RP assembly offers the highest
level of mechanical protection and is approved
for high-hazard situations involving both
backpressure and backsiphonage.
5. An Atmospheric Vacuum Breaker (AVB) must
be installed a minimum of how many inches
above the highest downstream piping or
overflow rim?
A) 2 inches
B) 6 inches
C) 12 inches
D) 18 inches
, Answer: B) 6 inches
Rationale: Plumbing codes and AWWA
standards mandate that an AVB must be
installed at least 6 inches above the highest
point of downstream usage to function
correctly.
6. Which device cannot be subjected to continuous
water pressure for more than 12 hours in a 24-
hour period?
A) Reduced Pressure Principle Assembly
B) Double Check Valve Assembly
C) Atmospheric Vacuum Breaker
D) Pressure Vacuum Breaker
Answer: C) Atmospheric Vacuum Breaker
Rationale: AVBs are designed for non-
continuous pressure applications. Continuous
pressure will cause the internal air-inlet valve
to stick shut, rendering it useless.
7. What is the minimum clearance required
between the relief valve discharge port of an RP
assembly and the floor or grade?
A) 6 inches
B) 12 inches
C) 18 inches
