7/29/26, 9:00 AM
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Title
CR-21 Landscapes and Irrigation AZROC Test Prep EXAM Already Verified Test | Questions & Answers, Well Elaborated | 100% Verified solu
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1
What is the minimum thickness of brick for the exterior wall of a fireplace?
a) 6 inches
b) 8 inches
c) 10 inches
d) 9 inches
TERM
8 Inches
Image
DEFINITION
2
What is 1/2 inch of accumulated organic material in a grassy area called?
a) mulch
b) ground cover
c) stolons
d) thatch layer
TERM
Thatch Layer
Image
DEFINITION
3
What should be provided as a cover for the drain tile before installing the pond liner where subdrain is used?
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,7/29/26, 9:00 AM
a) 4 inches of pea gravel
b) screen with 1/4 inch mesh
c) a pool grate
d) 8 inches of medium sized rock
TERM
4 inches of pea gravel
Image
DEFINITION
4
How do you properly 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
TERM
In rows, each row staggered
Image
DEFINITION
5
You are going to pour a concrete pad that is 16 feet by 22 feet and 4 inches thick, how many cubic yards of concrete are needed?
a) 7.3
b) 6.3
c) 3.3
d) 4.3
TERM
4.3 cubic yards
4.3 cubic yards Image
4inches ---> 0.333ft
Cubic feet to cubic yards /27
16*22*0.333=117.3333
117.3333/27 = 4.3 cubic yards
DEFINITION
6
How wide should the footer be for a CMU wall?
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,7/29/26, 9:00 AM
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
TERM
Twice the width of the block
Image
DEFINITION
7
How does a contractor 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
TERM
The specifications
Image
DEFINITION
8
How many 8inch x 8inchx16inch concrete masonry blocks will be required for a wall that is 8 feet 8 inches high and 104 feet long?
a) 936
b) 1088
c) 1124
d) 1014
TERM
1014 blocks
Image
8 feet * 12 inches = 96 inches + 8 inches = 104 inches
104 inches / 8 inches = 13 for height
104 feet * 12 inches = 1248 inches
1248 inches / 16 inches = 78 for length
13 * 78 = 1014 blocks
DEFINITION
9
What is the maximum height above grade of a wooden deck that a CR-21 license may build?
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, 7/29/26, 9:00 AM
a) 36 inches
b) 48 inches
c) 18 inches
d) 29 inches
TERM
29 inches
Image
DEFINITION
10
How do you choose a 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
TERM
Without calculations, it is better to go with a bigger weir
DEFINITION
11
How high can a segmented wall be built?
a) 3 feet
b) 6 feet
c) 9 feet
d) 4 feet
TERM
4 feet
Image
DEFINITION
12
Which is the most common voltage requirement for the operation of a typical irrigation system remote control valve?
a) 24 volt DC
b) 12 volt DC
c) 12 volt AC
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Create a new flashcard set Create
Public Saved under 1 min ago
Title
CR-21 Landscapes and Irrigation AZROC Test Prep EXAM Already Verified Test | Questions & Answers, Well Elaborated | 100% Verified solu
Add a description...
Import Add diagram
Suggestions
1
What is the minimum thickness of brick for the exterior wall of a fireplace?
a) 6 inches
b) 8 inches
c) 10 inches
d) 9 inches
TERM
8 Inches
Image
DEFINITION
2
What is 1/2 inch of accumulated organic material in a grassy area called?
a) mulch
b) ground cover
c) stolons
d) thatch layer
TERM
Thatch Layer
Image
DEFINITION
3
What should be provided as a cover for the drain tile before installing the pond liner where subdrain is used?
https://quizlet.com/1196984770/autosaved 1/225
,7/29/26, 9:00 AM
a) 4 inches of pea gravel
b) screen with 1/4 inch mesh
c) a pool grate
d) 8 inches of medium sized rock
TERM
4 inches of pea gravel
Image
DEFINITION
4
How do you properly 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
TERM
In rows, each row staggered
Image
DEFINITION
5
You are going to pour a concrete pad that is 16 feet by 22 feet and 4 inches thick, how many cubic yards of concrete are needed?
a) 7.3
b) 6.3
c) 3.3
d) 4.3
TERM
4.3 cubic yards
4.3 cubic yards Image
4inches ---> 0.333ft
Cubic feet to cubic yards /27
16*22*0.333=117.3333
117.3333/27 = 4.3 cubic yards
DEFINITION
6
How wide should the footer be for a CMU wall?
https://quizlet.com/1196984770/autosaved 2/225
,7/29/26, 9:00 AM
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
TERM
Twice the width of the block
Image
DEFINITION
7
How does a contractor 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
TERM
The specifications
Image
DEFINITION
8
How many 8inch x 8inchx16inch concrete masonry blocks will be required for a wall that is 8 feet 8 inches high and 104 feet long?
a) 936
b) 1088
c) 1124
d) 1014
TERM
1014 blocks
Image
8 feet * 12 inches = 96 inches + 8 inches = 104 inches
104 inches / 8 inches = 13 for height
104 feet * 12 inches = 1248 inches
1248 inches / 16 inches = 78 for length
13 * 78 = 1014 blocks
DEFINITION
9
What is the maximum height above grade of a wooden deck that a CR-21 license may build?
https://quizlet.com/1196984770/autosaved 3/225
, 7/29/26, 9:00 AM
a) 36 inches
b) 48 inches
c) 18 inches
d) 29 inches
TERM
29 inches
Image
DEFINITION
10
How do you choose a 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
TERM
Without calculations, it is better to go with a bigger weir
DEFINITION
11
How high can a segmented wall be built?
a) 3 feet
b) 6 feet
c) 9 feet
d) 4 feet
TERM
4 feet
Image
DEFINITION
12
Which is the most common voltage requirement for the operation of a typical irrigation system remote control valve?
a) 24 volt DC
b) 12 volt DC
c) 12 volt AC
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