Page 1 of 169
ADEQ Water Distribution Grades 1 & GRADE 2 Arizona Department of
Environmental Quality ALL 500 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR
QUESTION: 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
QUESTION: 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
1
, Page 2 of 169
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
QUESTION: 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
QUESTION: Name the condition in which the pressure in a distribution system is less than the
atmospheric pressure.
A. Backsiphonage
B. Suction
C. Vacuum
2
, Page 3 of 169
D. Cross connection - ANSWER-A. Backsiphonage
QUESTION: 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
QUESTION: 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
3
, Page 4 of 169
QUESTION: What does a double check valve backflow assembly provide effective protection
from?
A. All backflow situations
B. Backsiphonageof pollution
C. Backpressure of pollution
D. Both backpressure and backsiphonage of pollution - ANSWER-D. Both backpressure and
backsiphonage of pollution
QUESTION: What event does a continuous positive pressure in a distribution system prevent?
A. A backflow condition
B. Backsiphonage
C. Objectionable taste and odor
D. Scaling - ANSWER-A. A backflow condition
Q; 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
4
ADEQ Water Distribution Grades 1 & GRADE 2 Arizona Department of
Environmental Quality ALL 500 QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE THIS YEAR
QUESTION: 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
QUESTION: 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
1
, Page 2 of 169
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
QUESTION: 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
QUESTION: Name the condition in which the pressure in a distribution system is less than the
atmospheric pressure.
A. Backsiphonage
B. Suction
C. Vacuum
2
, Page 3 of 169
D. Cross connection - ANSWER-A. Backsiphonage
QUESTION: 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
QUESTION: 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
3
, Page 4 of 169
QUESTION: What does a double check valve backflow assembly provide effective protection
from?
A. All backflow situations
B. Backsiphonageof pollution
C. Backpressure of pollution
D. Both backpressure and backsiphonage of pollution - ANSWER-D. Both backpressure and
backsiphonage of pollution
QUESTION: What event does a continuous positive pressure in a distribution system prevent?
A. A backflow condition
B. Backsiphonage
C. Objectionable taste and odor
D. Scaling - ANSWER-A. A backflow condition
Q; 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
4
