Chapter 2 Flashcards
The highest point of a swale should be at least _____ lower than the finish elevation of any paved area or structure.
6 Inches
From that high point, a minimum of 2% downstream slope should be maintained with grades up to ______ allowed for short distance.
3%-5%
Never connect storm drains to what?
Sanitary sewer lines
What is the average life of a trench drain?
5-10 years
Beginning at the outlet point, excavate a _______ wide trench along the entire length of the collective system.
8-12 Inch
The trench should be deep enough that the grade can fall at a ________% rate from the highest inlet to the outlet point.
1%
Excavating the trench ______ inches deeper will allow a sand setting bed to be added.
1 to 2
Water flows into clay or concrete piping and is typically laid at a minimum slope of _______% to maintain flow.
1
Treatment of a drain outlet with ______ riprap to prevent erosion.
4-8 Inches
Masonry paved bricks used for a walkways and patios are thinner than regular bricks by approximately _________?
1 Inch
What are the actual dimensions of a 4 x 4 post?
3 1/2 x 3 1/2
Which treatment would be the least effective for preserving wood?
Paint
What is the minimum slope on a concrete patio to allow for drainage?
1/8”
The greatest angle above the horizontal plane at which a material will lie without sliding is _______?
Angle of repose
What is the purpose of “as built” (Record) drawings?
To insure that changes and deviations from the plans are recorded so the contractor can charge the owner.
When routing the electrical supply to an exterior location, all components should be placed in what?
Conduit
How deep should the conduit be in the ground?
18 Inches
How many ways for transformer and wiring options for DC lighting?
2
Installing conduit will ensure what?
Longer-lasting installation with fewer maintenance issue.
Excavating an 18 inch deep by _______ wide trench for proper conduit installations?
4 Inches
A separate curved piece of conduit should lead back down into the trench to start what?
Conduit run and next fixture
When mixing acid and water, always add what?
Acid to water
What procedures should you follow when applying acid and chemicals?
Manufacturers
What should be used for excavations on more than 2-3 cubic yards?
Skid-steer
When removing bulbs from a garden, which of the following tools is recommended?
Spading fork
Generally, contours which are closer together indicate a ______ slope?
Steep
All grading plans have a contour interval which ________?
Should remain the same over the entire plan.
Existing contour lines are usually shown by ______?
Continuous dashed lines (Broken)
Proposed contour lines are shown with _________?
A solid bold line
When can contours intervals overlap?
Overhang
Run-off water will always flow downhill along a line that is _______ the contour lines.
Perpendicular to
Contour lines are labeled with the number on the _________?
High side or in the middle of the lines
What type of sprinkler is most effective for watering with the least evaporation and the least amount of water?
Spray
The three basic types of sprinkler systems are the spray, rotary and quick-coupling systems. The type of sprinkler systems which is the most efficient in terms of uniform distributions of water, low evaporational loss and the shortest time scheduling for water is the _________?
Spray
The three basic types of sprinkler systems are the spray, rotary and quick-coupling systems. according to the turf irrigation manual, the type of sprinkling systems which is the most expensive to install is the_______?
Spray
On a pop up spray head, lack of any mist us evidence of _______?
Low Pressure
What is “pop-up” known as?
Lawn Head
The orifices of nozzles on both spray and rotary systems _______?
Define the radius of coverage and flow at a specified pressure.
What is the normal spray trajectory of a pop-up spray head
30 - 40 Degrees
Which head is the hardest to maintain because of its very small orifice?
Stream
What type of fitting is used when attaching the last sprinkler head on a pipe run to flexible swing joint?
90 Degree threaded elbow
What is holding current?
The amount of amps required to keep the solenoid open while irrigating.
How is a flexible swing joint attached?
With a barbed male adapter or male elbow
What is black wire used for?
Common or ground wire
How much coiled extra wire should you allow in a control valve?
1.5 Feet
Where is the booster pump located?
Along the pressurized mainline near the location you want to boost pressure.
Atmospheric Vacuum Breaker (AVB), Pressure Vacuum Breaker (PVB) and Hose Connection Vacuum Breaker (HCVB) are all?
Backflow prevention devices
Only one (AVB) is needed per circuit and must be installed ______ inches above the highest head?
12 Inches
If you need a lawn immediately, which is the best way to install?
Sodding
What element expands and compacts with the ground?
Clay
