2026 WATER DISTRIBUTION GRADE 1
CERTIFICATION ADEQ PRACTICE EXAM [version 2]
WITH 100+ QUESTIONS AND 100% verified ANSWERS
| ALREADY GRADED A+ | GUARANTEED SUCCESS |
WATER DISTRIBUTION FINAL EXAM
2026(NEWEST)
The outlet of a forced ventilation system for a chlorinator room should be located
a. above the window.
b. near the floor.
c. on the roof.
d. 6 ft above the floor. - ANSWER-b. near the floor.
The total dynamic head against which a pump must operate
a. is the friction head.
b. is the static head.
c. is the sum of the static head and the head due to friction loss.
d. must always be above the shutoff head. - ANSWER-c. is the sum of the static
head and the head due to friction loss.
All water pipes shall be installed at least 10 feet horizontally away from any and all
sewer lines and at least above any and all sewer lines.
a. 12 inches
b. 24 inches
c. 36 inches
,d. 48 inches - ANSWER-a. 12 inches
Reverse water flow in a distribution system caused by a vacuum in a water supply
main is called
a. backsiphonage.
b. indirect cross connection.
c. surge pressure.
d. water hammer. - ANSWER-a. backsiphonage.
Why must the relief port of a reduced pressure principle backflow prevention
device never be plugged or extended?
a. so the device will function as designed
b. the plug may interfere with the inspection and testing
c. to prevent excessive pressure build up in the consumer's home
d. none of the above - ANSWER-a. so the device will function as designed
In instances where non-potable water or toxic wastes are connected directly with
potable water systems, the preferred method of correction for such a cross
connection is by
a. installing multiple check valves on the safe water side.
b. installing physical separation (air gap) between the two systems.
c. maintaining a high pressure on the safe water system.
d. providing rapid cutoff valves in several locations. - ANSWER-b. installing
physical separation (air gap) between the two systems.
A connection between a safe and an unsafe water supply is called a
,a. cross connection.
b. intersection.
c. loss of head.
d. vacuum breaker. - ANSWER-a. cross connection.
Why is it important to thoroughly flush out a newly installed backflow-prevention
device before testing?
a. to allow water to flow in both directions through the unit
b. to equalize the pressures throughout the system
c. to rid the unit of corrosive chemicals
d. to rid the unit of foreign objects and particles - ANSWER-d. to rid the unit of
foreign objects and particles
Define the term "Backsiphonage"
A. A form of backflow due to an increase in system pressure which causes a
subatmospheric pressure to exist at the site in the water system
B. A form of backflow due to a reduction in system pressure which causes a
subatmospheric pressure to exist at the site in the water system
C. The undesirable reversal of flow of water, gases or other substances into the
distribution pipe of a potable supply of water from any source
D. Any elevation of pressure in a downstream piping system above the supply
pressure at the point of consideration which would cause a reversal of the normal
direction of flow - ANSWER-B. A form of backflow due to a reduction in system
pressure which causes a subatmospheric pressure to exist at the site in the water
system
How must a pressure vacuum breaker backflow device be installed?
, A. It must be at least 12 inches above the lowest downstream outlet
B. It must be at least 12 inches above the highest downstream outlet
C. It must be 6 inches above the downstream outlet
D. It must be 24 inches above the downstream outlet - ANSWER-B. It must be at
least 12 inches above the highest downstream outlet
Name the condition in which the pressure in a distribution system is less than the
atmospheric pressure.
A. Backsiphonage
B. Suction
C. Vacuum
D. Cross connection - ANSWER-A. Backsiphonage
On what item might you find a vacuum breaker?
A. An irrigation system
B. On an installation for a backpressure device
C. On a standpipe
D. On a fire system - ANSWER-A. An irrigation system
What does a backsiphonage condition usually cause?
A. Reduced pressure or negative pressure on the service or supply side
B. High pressure on the service side
C. High pressure on the supply side
D. Backpressure - ANSWER-A. Reduced pressure or negative pressure on the
service or supply side
CERTIFICATION ADEQ PRACTICE EXAM [version 2]
WITH 100+ QUESTIONS AND 100% verified ANSWERS
| ALREADY GRADED A+ | GUARANTEED SUCCESS |
WATER DISTRIBUTION FINAL EXAM
2026(NEWEST)
The outlet of a forced ventilation system for a chlorinator room should be located
a. above the window.
b. near the floor.
c. on the roof.
d. 6 ft above the floor. - ANSWER-b. near the floor.
The total dynamic head against which a pump must operate
a. is the friction head.
b. is the static head.
c. is the sum of the static head and the head due to friction loss.
d. must always be above the shutoff head. - ANSWER-c. is the sum of the static
head and the head due to friction loss.
All water pipes shall be installed at least 10 feet horizontally away from any and all
sewer lines and at least above any and all sewer lines.
a. 12 inches
b. 24 inches
c. 36 inches
,d. 48 inches - ANSWER-a. 12 inches
Reverse water flow in a distribution system caused by a vacuum in a water supply
main is called
a. backsiphonage.
b. indirect cross connection.
c. surge pressure.
d. water hammer. - ANSWER-a. backsiphonage.
Why must the relief port of a reduced pressure principle backflow prevention
device never be plugged or extended?
a. so the device will function as designed
b. the plug may interfere with the inspection and testing
c. to prevent excessive pressure build up in the consumer's home
d. none of the above - ANSWER-a. so the device will function as designed
In instances where non-potable water or toxic wastes are connected directly with
potable water systems, the preferred method of correction for such a cross
connection is by
a. installing multiple check valves on the safe water side.
b. installing physical separation (air gap) between the two systems.
c. maintaining a high pressure on the safe water system.
d. providing rapid cutoff valves in several locations. - ANSWER-b. installing
physical separation (air gap) between the two systems.
A connection between a safe and an unsafe water supply is called a
,a. cross connection.
b. intersection.
c. loss of head.
d. vacuum breaker. - ANSWER-a. cross connection.
Why is it important to thoroughly flush out a newly installed backflow-prevention
device before testing?
a. to allow water to flow in both directions through the unit
b. to equalize the pressures throughout the system
c. to rid the unit of corrosive chemicals
d. to rid the unit of foreign objects and particles - ANSWER-d. to rid the unit of
foreign objects and particles
Define the term "Backsiphonage"
A. A form of backflow due to an increase in system pressure which causes a
subatmospheric pressure to exist at the site in the water system
B. A form of backflow due to a reduction in system pressure which causes a
subatmospheric pressure to exist at the site in the water system
C. The undesirable reversal of flow of water, gases or other substances into the
distribution pipe of a potable supply of water from any source
D. Any elevation of pressure in a downstream piping system above the supply
pressure at the point of consideration which would cause a reversal of the normal
direction of flow - ANSWER-B. A form of backflow due to a reduction in system
pressure which causes a subatmospheric pressure to exist at the site in the water
system
How must a pressure vacuum breaker backflow device be installed?
, A. It must be at least 12 inches above the lowest downstream outlet
B. It must be at least 12 inches above the highest downstream outlet
C. It must be 6 inches above the downstream outlet
D. It must be 24 inches above the downstream outlet - ANSWER-B. It must be at
least 12 inches above the highest downstream outlet
Name the condition in which the pressure in a distribution system is less than the
atmospheric pressure.
A. Backsiphonage
B. Suction
C. Vacuum
D. Cross connection - ANSWER-A. Backsiphonage
On what item might you find a vacuum breaker?
A. An irrigation system
B. On an installation for a backpressure device
C. On a standpipe
D. On a fire system - ANSWER-A. An irrigation system
What does a backsiphonage condition usually cause?
A. Reduced pressure or negative pressure on the service or supply side
B. High pressure on the service side
C. High pressure on the supply side
D. Backpressure - ANSWER-A. Reduced pressure or negative pressure on the
service or supply side
