Random
Irrigation dates back to when
thousands of years
96.3X Total GPM / Total Area
Precipitation Rate
The first step to a well designed irrigation system
Collecting site data
For an irrigation system to work, actual head pressure has to be
equal to, or greater than minimum head pressure
In order to run multiple heads with varying arcs on the same zone, sprinkler heads must have
Matched precipitation rates
landscape irrigation as we know it has been around since when?
turn of the 20th century
What ohm reading indicates a short
Less than 20
What is not needed to determine available water capacity
size of city water main
For an irrigation system to operate correctly, the design pressure has to be
equal to, or less than static water pressure
What type of valve would be installed to offer water to a remote location?
quick coupler valve
precipitation rate is also referred to as
application rate
in wiring, the larger the number the wiring size does what?
goes down in size
In calculating available water capacity, rule #1 states pressure loss through the water meter should not exceed what percentage of the minimum static water pressure available
10%
to gain .433 PSI, your piping would have
elevation loss of one foot
A graphic representation of precipitation is called
A densogram
What is the maximum percentage of diffusion recommended on most sprinkler heads
25-30%
what ohm reading indicates a complete cut or open
very large number, infinity symbol, dashes
Water need for plant material is lost by
Evapotranspiration
The weight of one gallon of water
8.3 pounds
minimum head pressure plus the total of all pressure losses equals
Design Pressure
How do you determine slope
Rise divided by run
What spacing pattern has the row spacing equal to .866 times the head spacing
triangular
The maximum water flow through the meter should not exceed 75% of the safe flow of what
The meter
Maximum acceptable velocity of water in PVC
5 FPS
Static pressure minus all pressure losses gives you
Actual head pressure