9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
CR-21 Landscapes and Irrigation AZROC Test
Prep EXAM, QUESTIONS WITH ACCURATE
ANSWERS | MULTIPLE CHOICES |2025\2026!!
Save
Terms in this set (1434)
What is the minimum 8 Inches
thickness of brick for the
exterior wall of a
fireplace?
a) 6 inches
b) 8 inches
c) 10 inches
d) 9 inches
What is 1/2 inch of Thatch Layer
accumulated organic
material in a grassy area
called?
a) mulch
b) ground cover
c) stolons
d) thatch layer
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 1/412
,9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
What should be provided 4 inches of pea gravel
as a cover for the drain tile
before installing the pond
liner where subdrain is
used?
a) 4 inches of pea gravel
b) screen with 1/4 inch
mesh
c) a pool grate
d) 8 inches of medium
sized rock
How do you properly In rows, each row staggered
plant ground cover?
a) in a circular pattern
b) in rows, each row
staggered
c) in groups of 2
d) 18 inches apart in rows
You are going to pour a 4.3 cubic yards
concrete pad that is 16 4.3 cubic yards
feet by 22 feet and 4 4inches ---> 0.333ft
inches thick, how many Cubic feet to cubic yards /27
cubic yards of concrete 16220.333=117.3333
are needed? 117.3333/27 = 4.3 cubic yards
a) 7.3
b) 6.3
c) 3.3
d) 4.3
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 2/412
,9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
How wide should the Twice the width of the block
footer be for a CMU wall?
a) equal to the width of
the block
b) equal to the depth of
the frostline
c) three times the width of
the block
d) twice the width of the
block
How does a contractor The specifications
know how to fill a trench
to a certain grade?
a) by guessing
b) the type of soil
c) by available backfill
d) the specifications
How many 8inch x 1014 blocks
8inchx16inch concrete
masonry blocks will be 8 feet * 12 inches = 96 inches + 8 inches = 104 inches
required for a wall that is 8 104 inches / 8 inches = 13 for height
feet 8 inches high and 104 104 feet * 12 inches = 1248 inches
feet long? 1248 inches / 16 inches = 78 for length
13 * 78 = 1014 blocks
a) 936
b) 1088
c) 1124
d) 1014
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 3/412
, 9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
What is the maximum 29 inches
height above grade of a
wooden deck that a CR-21
license may build?
a) 36 inches
b) 48 inches
c) 18 inches
d) 29 inches
How do you choose a Without calculations, it is better
weir? to go with a bigger weir
a) by the cost
b) without calculations, it
is better to go with a
bigger weir
c) without calculations, it is
better to go with a smaller
weir
d) by the material used
How high can a 4 feet
segmented wall be built?
a) 3 feet
b) 6 feet
c) 9 feet
d) 4 feet
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 4/412
CR-21 Landscapes and Irrigation AZROC Test
Prep EXAM, QUESTIONS WITH ACCURATE
ANSWERS | MULTIPLE CHOICES |2025\2026!!
Save
Terms in this set (1434)
What is the minimum 8 Inches
thickness of brick for the
exterior wall of a
fireplace?
a) 6 inches
b) 8 inches
c) 10 inches
d) 9 inches
What is 1/2 inch of Thatch Layer
accumulated organic
material in a grassy area
called?
a) mulch
b) ground cover
c) stolons
d) thatch layer
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 1/412
,9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
What should be provided 4 inches of pea gravel
as a cover for the drain tile
before installing the pond
liner where subdrain is
used?
a) 4 inches of pea gravel
b) screen with 1/4 inch
mesh
c) a pool grate
d) 8 inches of medium
sized rock
How do you properly In rows, each row staggered
plant ground cover?
a) in a circular pattern
b) in rows, each row
staggered
c) in groups of 2
d) 18 inches apart in rows
You are going to pour a 4.3 cubic yards
concrete pad that is 16 4.3 cubic yards
feet by 22 feet and 4 4inches ---> 0.333ft
inches thick, how many Cubic feet to cubic yards /27
cubic yards of concrete 16220.333=117.3333
are needed? 117.3333/27 = 4.3 cubic yards
a) 7.3
b) 6.3
c) 3.3
d) 4.3
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 2/412
,9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
How wide should the Twice the width of the block
footer be for a CMU wall?
a) equal to the width of
the block
b) equal to the depth of
the frostline
c) three times the width of
the block
d) twice the width of the
block
How does a contractor The specifications
know how to fill a trench
to a certain grade?
a) by guessing
b) the type of soil
c) by available backfill
d) the specifications
How many 8inch x 1014 blocks
8inchx16inch concrete
masonry blocks will be 8 feet * 12 inches = 96 inches + 8 inches = 104 inches
required for a wall that is 8 104 inches / 8 inches = 13 for height
feet 8 inches high and 104 104 feet * 12 inches = 1248 inches
feet long? 1248 inches / 16 inches = 78 for length
13 * 78 = 1014 blocks
a) 936
b) 1088
c) 1124
d) 1014
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 3/412
, 9/13/25, 1:39 PM CR-21 Landscapes and Irrigation AZROC Test Prep EXAM, QUESTIONS WITH ACCURATE ANSWERS | MULTIPLE CHOICES |2…
What is the maximum 29 inches
height above grade of a
wooden deck that a CR-21
license may build?
a) 36 inches
b) 48 inches
c) 18 inches
d) 29 inches
How do you choose a Without calculations, it is better
weir? to go with a bigger weir
a) by the cost
b) without calculations, it
is better to go with a
bigger weir
c) without calculations, it is
better to go with a smaller
weir
d) by the material used
How high can a 4 feet
segmented wall be built?
a) 3 feet
b) 6 feet
c) 9 feet
d) 4 feet
https://quizlet.com/1075743540/cr-21-landscapes-and-irrigation-azroc-test-prep-exam-questions-with-accurate-answers-multiple-choices-20252026-… 4/412
