Cr21 Exam Prep Bundle :Practice
Questions & Complete Solutions (A+
Guide)
Where do you attach the stretcher when pulling the fabric on chain link or wire
fences?
Terminal posts
Which of the following would you not do in the first year after planting conifer
tree?
Fertilize
In general, the right side of drawing would represent what direction?
East
When installing an electrical irrigation pump, a circuit breaker disconnect must
be installed within how many feet of the pump?
50 feet
What is the benefit of an as built plan?
To indicate where in lines are for future, additions, or repairs
x
What does orange mean in utility marking?
Phones communications
Where should a transformer with photocell be installed?
Where there is ample sunlight
How does a contractor know to fill a trench to a certain grade?
The specifications
What is the maximum height above grade of a wooden deck that a CR - 21 license
me build?
29 inches
What should be added to the soil if it has a high pH level?
Sulfur
The sprinkler water passing through an electric solenoid, diaphragm valve
contains debris and the inlet port is blocked. Water can't flow into the?
Upper chamber and valve remains open
When erosion paddling occur on a job site you should?
Install erosion control measures
How often does a backflow prevention device have to be tested?
Every 12 months
What do you do before grading?
Check natural drainage
What is the maximum pressure variance for drip line emitters?
20%
How deep should screws penetrate wood studs when applying veneer plaster?
5/8 inches
,What is the max distance that a cement, plasters scaffolding platform can be from
the face of the wall without additional wall protection?
18 inches
What is the most common way to clean efflorescence off a block wall?
Sandblasting
What must survey instrument be equipped with to measure both distance and
elevation?
Stadia hairs
A job takes two men 40 hours each to complete the employer has a five man
assuming they would work an eight hours. how long will a five-man crew take?
Two days
If you cut powerline while excavating and are found in violation of the law, what is
the fine?
$5000
Which of the following is a xeriscaping fundamental?
Water conservation
What is the actual size of a 2 x 4 servicing dry piece of framing lumber?
1 1/2×3 1/2
According to Arizona registrar regulations, a R Dash 21 license could be used
for?
Building a decorative trellis
What procedure should be used for a flag stone patio?
Start at edges and work towards middle
Which of the following is not an appurtenance?
residential structure
What is the first step when installing a fence around a property?
Walk the proposed layout
What maximum pressure is allowed in a water distribution system before a
pressure reducing valve is required?
80PSI
What is the minimum distance that a portable water heater should be placed away
from a wall?
12 inches
How do you determine slope percentage?
Vertical divided by horizontal
How long should you wait after the first course of a block wall before continuing?
2 to 3 hours
A lintel should have a medium of how many inches of bearing over the ends of
each jamb?
4 INCHES
How far apart should bands be placed?
12 inches
Trees survive, better planting when?
Using existing soil from site
How long before digging should you notify the local marking company?
Two days
, A strainer for an irrigation system that will be subject to blow down should be?
Equipped with a blow down valve, slightly larger than the blow down, tapping
What is the friction loss for 10 gallons per minute and 100 feet of 3/4 inch pipe?
4.30.
When using Portland cement on an exterior what is the proper ratio of cement to
sand?
3 to 1 ratio
After blue stake has marked facilities how many working days are the marking
good for?
15 days
Blue stake uses orange to Mark what?
Fiber, optics, cable, phones
When should drainage tile be installed?
After grade is complete and before soil is conditioned
Which fertilizer analysis is best for use in the desert?
4- 12-4
on a power tool when it is allowable to have a lock on a switch?
if you can be turned off with a single finger motion
What is the minimum psi of concrete steps exposed to weather?
2500 psi
How do you reduce voltage lost over a long run?
Increase size of wire
What happens when a valve is installed down a slope from the main line?
Increase in static pressure
It is only necessary to_______ of the root zone of most plants to provide the
benefit of irrigation?
50%
How wide should a footer be for a CMU wall?
Twice the width of the block
When connecting a portable water system to an irrigation system a
_______________ must be installed to prevent chemical contamination?
Backflow prevention valve
What kind of nail resist resting and hold up well?
Hot dipped, and zinc galvanized
What is the least costly lawn?
Seeding
The caring of concrete continues as long as its relative humidity remains above?
80%
What is the pressure rating of a pipe that is stamped 2 inch SCH 40 PVC 1120 280
psi at 23° c, astm D-1785 uspi nsf-owner?
280
What can be applied to arid region tree trunks to prevent water loss?
Whitewash paint
What is the purpose of a fitting?
linking different sizes of pipe Caliche soil is recognized by its?
Questions & Complete Solutions (A+
Guide)
Where do you attach the stretcher when pulling the fabric on chain link or wire
fences?
Terminal posts
Which of the following would you not do in the first year after planting conifer
tree?
Fertilize
In general, the right side of drawing would represent what direction?
East
When installing an electrical irrigation pump, a circuit breaker disconnect must
be installed within how many feet of the pump?
50 feet
What is the benefit of an as built plan?
To indicate where in lines are for future, additions, or repairs
x
What does orange mean in utility marking?
Phones communications
Where should a transformer with photocell be installed?
Where there is ample sunlight
How does a contractor know to fill a trench to a certain grade?
The specifications
What is the maximum height above grade of a wooden deck that a CR - 21 license
me build?
29 inches
What should be added to the soil if it has a high pH level?
Sulfur
The sprinkler water passing through an electric solenoid, diaphragm valve
contains debris and the inlet port is blocked. Water can't flow into the?
Upper chamber and valve remains open
When erosion paddling occur on a job site you should?
Install erosion control measures
How often does a backflow prevention device have to be tested?
Every 12 months
What do you do before grading?
Check natural drainage
What is the maximum pressure variance for drip line emitters?
20%
How deep should screws penetrate wood studs when applying veneer plaster?
5/8 inches
,What is the max distance that a cement, plasters scaffolding platform can be from
the face of the wall without additional wall protection?
18 inches
What is the most common way to clean efflorescence off a block wall?
Sandblasting
What must survey instrument be equipped with to measure both distance and
elevation?
Stadia hairs
A job takes two men 40 hours each to complete the employer has a five man
assuming they would work an eight hours. how long will a five-man crew take?
Two days
If you cut powerline while excavating and are found in violation of the law, what is
the fine?
$5000
Which of the following is a xeriscaping fundamental?
Water conservation
What is the actual size of a 2 x 4 servicing dry piece of framing lumber?
1 1/2×3 1/2
According to Arizona registrar regulations, a R Dash 21 license could be used
for?
Building a decorative trellis
What procedure should be used for a flag stone patio?
Start at edges and work towards middle
Which of the following is not an appurtenance?
residential structure
What is the first step when installing a fence around a property?
Walk the proposed layout
What maximum pressure is allowed in a water distribution system before a
pressure reducing valve is required?
80PSI
What is the minimum distance that a portable water heater should be placed away
from a wall?
12 inches
How do you determine slope percentage?
Vertical divided by horizontal
How long should you wait after the first course of a block wall before continuing?
2 to 3 hours
A lintel should have a medium of how many inches of bearing over the ends of
each jamb?
4 INCHES
How far apart should bands be placed?
12 inches
Trees survive, better planting when?
Using existing soil from site
How long before digging should you notify the local marking company?
Two days
, A strainer for an irrigation system that will be subject to blow down should be?
Equipped with a blow down valve, slightly larger than the blow down, tapping
What is the friction loss for 10 gallons per minute and 100 feet of 3/4 inch pipe?
4.30.
When using Portland cement on an exterior what is the proper ratio of cement to
sand?
3 to 1 ratio
After blue stake has marked facilities how many working days are the marking
good for?
15 days
Blue stake uses orange to Mark what?
Fiber, optics, cable, phones
When should drainage tile be installed?
After grade is complete and before soil is conditioned
Which fertilizer analysis is best for use in the desert?
4- 12-4
on a power tool when it is allowable to have a lock on a switch?
if you can be turned off with a single finger motion
What is the minimum psi of concrete steps exposed to weather?
2500 psi
How do you reduce voltage lost over a long run?
Increase size of wire
What happens when a valve is installed down a slope from the main line?
Increase in static pressure
It is only necessary to_______ of the root zone of most plants to provide the
benefit of irrigation?
50%
How wide should a footer be for a CMU wall?
Twice the width of the block
When connecting a portable water system to an irrigation system a
_______________ must be installed to prevent chemical contamination?
Backflow prevention valve
What kind of nail resist resting and hold up well?
Hot dipped, and zinc galvanized
What is the least costly lawn?
Seeding
The caring of concrete continues as long as its relative humidity remains above?
80%
What is the pressure rating of a pipe that is stamped 2 inch SCH 40 PVC 1120 280
psi at 23° c, astm D-1785 uspi nsf-owner?
280
What can be applied to arid region tree trunks to prevent water loss?
Whitewash paint
What is the purpose of a fitting?
linking different sizes of pipe Caliche soil is recognized by its?
