CR- 21 Landscapes and Irrigation AZROC Actual
Exam – Arizona Registrar of Contractors
(AZROC) Commercial Landscaping and
Irrigation – 2026/2027 Edition – Verified
Questions and Answers
The mortar joint having a vertical transverse plane best describes ?
head joint
What is the minimum spacing between block and rebar when grouting masonry unit ?
1/4 inch
What are pipe loops used for ?
To reduce friction loss
How many volts does an automated sprinkler system use ?
24
What is the minimum grade needed for proper drainage ?
3 % or greater
, Which of the following is used to prevent back siphonage only ?
vacuum breakers
What minimum size perforated pipe shall be used in a gray water irrigation system ?
3 inches
Wall ties should be placed how far from the exposed edge of a masonry unit ?
5/8 inch
According to the OSHA standards for the construction industry , compressed air shall not be used
for cleaning purposes except when
less than 30 psi and with chip guarding
Which of the following conditions in sprinkler's control wiring could cause a remote control
valve that is open to remain open ?
current leakage to the earth from a valve control wire
At which slope is grading required ?
Less than 5 %
According to code , what is the maximum area of a brick veneer wall that an anchor tie shall
support ?
Exam – Arizona Registrar of Contractors
(AZROC) Commercial Landscaping and
Irrigation – 2026/2027 Edition – Verified
Questions and Answers
The mortar joint having a vertical transverse plane best describes ?
head joint
What is the minimum spacing between block and rebar when grouting masonry unit ?
1/4 inch
What are pipe loops used for ?
To reduce friction loss
How many volts does an automated sprinkler system use ?
24
What is the minimum grade needed for proper drainage ?
3 % or greater
, Which of the following is used to prevent back siphonage only ?
vacuum breakers
What minimum size perforated pipe shall be used in a gray water irrigation system ?
3 inches
Wall ties should be placed how far from the exposed edge of a masonry unit ?
5/8 inch
According to the OSHA standards for the construction industry , compressed air shall not be used
for cleaning purposes except when
less than 30 psi and with chip guarding
Which of the following conditions in sprinkler's control wiring could cause a remote control
valve that is open to remain open ?
current leakage to the earth from a valve control wire
At which slope is grading required ?
Less than 5 %
According to code , what is the maximum area of a brick veneer wall that an anchor tie shall
support ?
