Chapter 4 Flashcards
Which of the following classifications is most commonly used for wiring electrical irrigation valves underground?
UF
Which of the following wire classifications would NOT be used for wiring electrical irrigation valves?
NOTE: Remember the type which does not contain the letter U (underground
THHN
How is a vapor barrier rated?
Perm Values.
What is the minimum slope on a concrete patio to allow for drainage
1/8”
Properly installed exterior lighting requires what footing to prevent damage to the fixture from heaving?
Frost
What are standards placed over or inserted into the footing?
Anchor Bolts
What do you see to cut PVC pipe?
Pipe Cutter or hacksaw
Installation of many utilities are restricted to a licensed specialist plumber or irrigation specialist but the landscape contractor may be called upon to complete what?
Hydrant installation and supply lines.
Who must inspect all public and private water systems?
Health Department
Freeze point hydrants, the water line buried below what?
Below frost depth
When establishing an irrigation system an adequate available what is required?
Water Supply
How do you measure adequate water pressure?
Pounds per square inch- PSI
What is the best philosophy?
Protect the plants that are currently in good health.
In the case of photocells, controllers must be located in an area that receives ample sunlight. This may necessitates that transformers with built-in controllers be located where?
Outside a structure.
What reduces voltage drop?
Short cable runs
What type of tracks should be used on equipment?
Rubber Tracks
A “water sprout” is a growth that ___________?
Develops along the trunk of the tree
A pressure type vacuum breaker is unlike an atmospheric vacuum breaker because it __________?
Can be pressurized on inlet an outlets sides.
What motion do you apply when applying the primer?
Scrubbing motion
The best time to plant native desert species is _________?
Fall
Most desert plants roots rot if grown in poorly drained soil. Planting during the _________ seasons permit strong roots to develop?
Cool
___________ is performed to achieve the desired landform.
Rough Grading
Connecting cable to lamp base, a metal prong must penetrate where?
Each Side of the cable for light to work
The lower basin contains the _________ the recirculated water to the top of supply the falls
Pump
The most common wire gauges for kits are often _________?
18 Gauge
_________ electrical systems require an alternating current _______ outlet to provide power.
DC, AC
Who’s authorization does a sub contractor need to begin work?
General Contractor
What type of work does not qualify for additional pay?
Restoration work
Workers should be aware of any plant that may trigger dermatitus when contracted. Poisonous plants should be removed or avoided what should be used?
Protective clothing to avoid direct contact
Learning how to lift and following simple rules will assist in reducing back injury from landscape construction activity. What should you do before beginning work?
Stretching exercises
Trenches should be at least how wide?
4-6 Inches
What kind of fences will prevent eroded soil from passing into a protected area?
Silt Fence
When heaving occurs, it is advisable to __________ the lawn to insure the roots will not dry?
light Roll
Although the spacing for sprinklers heads may very because of flow static pressure for small water supply, the standard throughout the industry is _________ feet triangular spacing?
20 Feet
What is the secondary consideration when planting desert landscaping on a slope?
How the roots of plants grow
Where is the light for shadow lighting located?
In front of the plant
A _______ allows the user to control the lights or turn lights on at dusk.
Controller
Before construction can proceed what is next?
Layout of critical dimensions and grade
What do you use to remove the debris
Skid-steer
What are very large projects stripped with?
Paddle Scraper
What are the two steps used to remove shrubs?
Cut and removed, with crown or root dugout and removed
Trees over 30’ in height or 10’ in diameter who do you call?
A professional remover
Which of the following soils will drain the slowest?
Clay
Infiltration systems of soil depend on the slope and
Amount of water applied
A grass parkway is 4’-10’ wide. The sprinkler heads would be placed ___________?
Along the curb, with a single row of part-circle sprinklers
