1|Page
CR-21 LANDSCAPES AND IRRIGATION
AZROC TEST PREP 2026|ACTUAL
QUESTIONS WITH CORRECT ANSWERS
Trenches that are over excavated and require backfilling below the level of the
pipe shall be backfilled in layers not exceeding:
a) 6 inches
b) 3 inches
c) 12 icnhes
d) 18 inches - correct-answer - 6 inches
What is the purpose of humus?
a) to increase water retention
b) to aid in compaction
c) to replace sulfur
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d) to decrease water retention - correct-answer - to increase water retention
When fertilizing the southwestern garden, among chemical fertilizers, the __
analysis is used most often.
a) 5-10-10
b) 20-10-10
c) 4-10-10
d) 4-12-4 - correct-answer - 4-12-4
What would you add to soil to increase its' pH value?
a) lime
b) sulphate
c) chelating agent
d) wetting agent - correct-answer - Lime
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What is the minimum grade needed for proper drainage?
a) less than 1%
b) 1% or greater
c) less than 3%
d) 3% or greater - correct-answer - 3% or greater
Many shrubs are planted for their flowering qualities and must be pruned at the
proper time to realize their maximum potential for flowering. Spring flowering
shrubs should be pruned in____
a) fall
b) early spring
c) late spring
d) later summer - correct-answer - early spring
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What causes a pop-up riser to rise?
a) timer
b) electric current
c) suction
d) water pressure - correct-answer - Water pressure
How long do you need to wait before setting the second course on the base?
a) 2 hours
b) 1 hour
c) no waiting
d) 1 day - correct-answer - 1 hour
Refer to the illustration, which of the following shows a 180 degree arc?
a) D
CR-21 LANDSCAPES AND IRRIGATION
AZROC TEST PREP 2026|ACTUAL
QUESTIONS WITH CORRECT ANSWERS
Trenches that are over excavated and require backfilling below the level of the
pipe shall be backfilled in layers not exceeding:
a) 6 inches
b) 3 inches
c) 12 icnhes
d) 18 inches - correct-answer - 6 inches
What is the purpose of humus?
a) to increase water retention
b) to aid in compaction
c) to replace sulfur
,2|Page
d) to decrease water retention - correct-answer - to increase water retention
When fertilizing the southwestern garden, among chemical fertilizers, the __
analysis is used most often.
a) 5-10-10
b) 20-10-10
c) 4-10-10
d) 4-12-4 - correct-answer - 4-12-4
What would you add to soil to increase its' pH value?
a) lime
b) sulphate
c) chelating agent
d) wetting agent - correct-answer - Lime
,3|Page
What is the minimum grade needed for proper drainage?
a) less than 1%
b) 1% or greater
c) less than 3%
d) 3% or greater - correct-answer - 3% or greater
Many shrubs are planted for their flowering qualities and must be pruned at the
proper time to realize their maximum potential for flowering. Spring flowering
shrubs should be pruned in____
a) fall
b) early spring
c) late spring
d) later summer - correct-answer - early spring
, 4|Page
What causes a pop-up riser to rise?
a) timer
b) electric current
c) suction
d) water pressure - correct-answer - Water pressure
How long do you need to wait before setting the second course on the base?
a) 2 hours
b) 1 hour
c) no waiting
d) 1 day - correct-answer - 1 hour
Refer to the illustration, which of the following shows a 180 degree arc?
a) D
