CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
What thickness in millimeters of pavers is used for resi-
dences? D. 63.5
A. .6 Brick (paving brick, pavers). Rectangular fired clay brick
with typical dimensions of 4 inches x 8 inches x 2.5 inches
B. .5
thick. Available in a range of colors, paving bricks have no
mortar holes and an average strength of approximately
C. .75
5,000 PSI.
D. 63.5
What is the length of a standard concrete block including
the mortar joint?
D. 16 inches
A. 8 inches
Sizes are usually given in their nominal dimensions.A unit
B. 10 inches measuring 7 5/8" wide, 7 5/8" high, and 15 5/8"long is
known as an 8" x 8" x 16" unit. The mortar jointis intended
C. 12 inches to be 3/8" to fit the modular design basedon a 4" module.
D. 16 inches
When should you seal the bottom of a piece of wood
fencing?
A. If water pools under them D. If it touches the earth
B. when within 5 feet of a sprinkler head
If the boards have to touch the earth, seal the board ends
C. If there is less than 2 inches of clearance from the before you install them.
ground.
D. If it touches the earth
How is transplant shock avoided? B. Anti transpirants
,CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
A. NEED HELP WITH THIS CHOICE Antitranspirants, also called antidesiccants, are chemicals
that reduce the amount of water plants lose through tran-
B. Anti transpirants
spiration. Antitranspirants are useful because excessive
water loss can result in transplant shock. They normally
C. increase water
act either to induce closing of the stomata or to cover the
D. Fertilize stomata with a water-impermeable coating.
A trench has been prepared for a gray water irrigation
lines, according to the International Residential Code,
what shall be the minimum depth of the filter material
beneath the perforated line?
D. 6 inches
A. 12 inches Not less than 6 inches in depth of aggregate, ranging in
size from 1/2 to 2-1/2 inches (12.7 mm to 64 mm), shall be
B. 3 inches laid into the trench below the distribution piping elevation.
C. 8 inches
D. 6 inches
A CR-21 licensee may install residential misting systems
under what PSI?
A. 1000 psi
A. 1000 psi HARDSCAPING AND IRRIGATION SYSTEMS This classifica-
tion allows the licensee to install, alter, and repair:
B. 120 psi Residential outdoor misting systems. Free standing or
attached to existing appurtenance, not more than 1000
C. 90 psi PSI.
D. 500 psi
Blue Stake uses orange to mark which of the following? C. Fiber Optics, Cable, Phone
,CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
A. Gas
Electric Power Distribution - Safety Red Gas, Oil Distri-
B. Electric bution - High Visibility Safety Yellow Telephone, Cable,
Fiber Optics - Safety Alert Orange Water Systems - Safety
C. Fiber Optics, Cable, Phone Precaution Blue Sanitary Sewer Systems - Safety Green
Reclaimed Water - Purple
D. Sewer
What color is used to mark an area for locating utilities
prior to excavations?
A. Green
B. White
B. White
C. Blue
D. Pink
All of the following will not decrease the water pressure in
a long run of irrigation pipe except?
A. A pipe going down hill
D. Going from a smaller piper to a larger pipe
B. Going from a larger pipe to a smaller pipe
C. Less Sprinklers on a run
D. Going from a smaller piper to a larger pipe
How is total surge pressure calculate?
A. Surge pressure caused by an opening valve plus work- C. Surge pressure caused by a closing valve plus working
ing pressure in the pipe line pressure in the pipeline
B. Water hammer plus static pressure in the pipe line
, CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
C. Surge pressure caused by a closing valve plus working
pressure in the pipeline
Pressure caused by closing a valve on pressured water
D. Working water pressure in the pipeline plus static pres-
sure
When is a good time to transplant?
A. Summer
B. NEED HELP D. Early Fall
C. Late Spring
D. Early Fall
What kind of screw resists rusting?
A. Fine thread
B. Steel D. Brass
C. Phillips
D. Brass
A footing for a fence is 2 Ft deep, 1 Ft wide, and 40 Ft
length, how many cubic yards of concrete will we need? A. 2.96 CY
A. 2.96 CY Reason: Use Formula LxWxD in order to find solution,
in this case it is 2x1x40. Then you divide answer by 27
B. 80 CY
(amount of cubic feet in a yard) to get answer 2.96
C. 16 CY
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
What thickness in millimeters of pavers is used for resi-
dences? D. 63.5
A. .6 Brick (paving brick, pavers). Rectangular fired clay brick
with typical dimensions of 4 inches x 8 inches x 2.5 inches
B. .5
thick. Available in a range of colors, paving bricks have no
mortar holes and an average strength of approximately
C. .75
5,000 PSI.
D. 63.5
What is the length of a standard concrete block including
the mortar joint?
D. 16 inches
A. 8 inches
Sizes are usually given in their nominal dimensions.A unit
B. 10 inches measuring 7 5/8" wide, 7 5/8" high, and 15 5/8"long is
known as an 8" x 8" x 16" unit. The mortar jointis intended
C. 12 inches to be 3/8" to fit the modular design basedon a 4" module.
D. 16 inches
When should you seal the bottom of a piece of wood
fencing?
A. If water pools under them D. If it touches the earth
B. when within 5 feet of a sprinkler head
If the boards have to touch the earth, seal the board ends
C. If there is less than 2 inches of clearance from the before you install them.
ground.
D. If it touches the earth
How is transplant shock avoided? B. Anti transpirants
,CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
A. NEED HELP WITH THIS CHOICE Antitranspirants, also called antidesiccants, are chemicals
that reduce the amount of water plants lose through tran-
B. Anti transpirants
spiration. Antitranspirants are useful because excessive
water loss can result in transplant shock. They normally
C. increase water
act either to induce closing of the stomata or to cover the
D. Fertilize stomata with a water-impermeable coating.
A trench has been prepared for a gray water irrigation
lines, according to the International Residential Code,
what shall be the minimum depth of the filter material
beneath the perforated line?
D. 6 inches
A. 12 inches Not less than 6 inches in depth of aggregate, ranging in
size from 1/2 to 2-1/2 inches (12.7 mm to 64 mm), shall be
B. 3 inches laid into the trench below the distribution piping elevation.
C. 8 inches
D. 6 inches
A CR-21 licensee may install residential misting systems
under what PSI?
A. 1000 psi
A. 1000 psi HARDSCAPING AND IRRIGATION SYSTEMS This classifica-
tion allows the licensee to install, alter, and repair:
B. 120 psi Residential outdoor misting systems. Free standing or
attached to existing appurtenance, not more than 1000
C. 90 psi PSI.
D. 500 psi
Blue Stake uses orange to mark which of the following? C. Fiber Optics, Cable, Phone
,CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
A. Gas
Electric Power Distribution - Safety Red Gas, Oil Distri-
B. Electric bution - High Visibility Safety Yellow Telephone, Cable,
Fiber Optics - Safety Alert Orange Water Systems - Safety
C. Fiber Optics, Cable, Phone Precaution Blue Sanitary Sewer Systems - Safety Green
Reclaimed Water - Purple
D. Sewer
What color is used to mark an area for locating utilities
prior to excavations?
A. Green
B. White
B. White
C. Blue
D. Pink
All of the following will not decrease the water pressure in
a long run of irrigation pipe except?
A. A pipe going down hill
D. Going from a smaller piper to a larger pipe
B. Going from a larger pipe to a smaller pipe
C. Less Sprinklers on a run
D. Going from a smaller piper to a larger pipe
How is total surge pressure calculate?
A. Surge pressure caused by an opening valve plus work- C. Surge pressure caused by a closing valve plus working
ing pressure in the pipe line pressure in the pipeline
B. Water hammer plus static pressure in the pipe line
, CR-21 Landscapes and Irrigation Comprehensive Resource To Help You Ace 2026-2027 Exams Includes
Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
C. Surge pressure caused by a closing valve plus working
pressure in the pipeline
Pressure caused by closing a valve on pressured water
D. Working water pressure in the pipeline plus static pres-
sure
When is a good time to transplant?
A. Summer
B. NEED HELP D. Early Fall
C. Late Spring
D. Early Fall
What kind of screw resists rusting?
A. Fine thread
B. Steel D. Brass
C. Phillips
D. Brass
A footing for a fence is 2 Ft deep, 1 Ft wide, and 40 Ft
length, how many cubic yards of concrete will we need? A. 2.96 CY
A. 2.96 CY Reason: Use Formula LxWxD in order to find solution,
in this case it is 2x1x40. Then you divide answer by 27
B. 80 CY
(amount of cubic feet in a yard) to get answer 2.96
C. 16 CY
