CR 21 LANDSCAPES AND IRRIGATION AZROC
TEST PREP IRRIGATION SYSTEMS AND
LANDSCAPE DESIGN BREAKDOWN 2026
◉ 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. Answer: 6 inches
◉ What is the purpose of humus?
a) to increase water retention
b) to aid in compaction
c) to replace sulfur
d) to decrease water retention. 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. 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. Answer: Lime
◉ 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. 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. Answer: early spring
◉ What causes a pop-up riser to rise?
a) timer
b) electric current
c) suction
d) water pressure. 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. Answer: 1 hour
, ◉ Refer to the illustration, which of the following shows a 180
degree arc?
a) D
b) B
c) A
d) C. Answer: B
◉ A concrete slab should be bull floated as soon as possible after:
a) placing
b) screeding
c) floating
d) edging. Answer: screeding
◉ What is the advantage of using veneer plaster over conventional
plaster?
a) it is more water resistant
b) it is better able to receive wall covering
c) it is faster
d) it is more durable. Answer: it is faster
TEST PREP IRRIGATION SYSTEMS AND
LANDSCAPE DESIGN BREAKDOWN 2026
◉ 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. Answer: 6 inches
◉ What is the purpose of humus?
a) to increase water retention
b) to aid in compaction
c) to replace sulfur
d) to decrease water retention. 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. 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. Answer: Lime
◉ 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. 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. Answer: early spring
◉ What causes a pop-up riser to rise?
a) timer
b) electric current
c) suction
d) water pressure. 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. Answer: 1 hour
, ◉ Refer to the illustration, which of the following shows a 180
degree arc?
a) D
b) B
c) A
d) C. Answer: B
◉ A concrete slab should be bull floated as soon as possible after:
a) placing
b) screeding
c) floating
d) edging. Answer: screeding
◉ What is the advantage of using veneer plaster over conventional
plaster?
a) it is more water resistant
b) it is better able to receive wall covering
c) it is faster
d) it is more durable. Answer: it is faster
