WITH QUESTIONS AND ANSWERS||
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LATEST UPDATE 2026
What does PVC 1220 stand for? - ANSWER-Type 1, Grade 2, 2000 psi
hydrostatic design stress
What types of copper pipe are available? - ANSWER-K, L, and M
Which type of copper has the heaviest wall thickness? - ANSWER-K
What is the C factor reference in piping? - ANSWER-How smooth the inside of
the pipe is
What would the average precipitation rate be in an area of 500 square feet with
total GPM of 8? - ANSWER-1.54 in/hr Use the Total Area Precipitation
Method
(memorize this formula for the exam):
96.3 X Total GPM / Total Area
96.3 x 8 =1.54"/hr.
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500
,Multiple start times help prevent or control: - ANSWER-Run-off
What does the water budget controller feature do? - ANSWER-It allows for an
increase or decrease in run times by percentage to help regulate and save water.
What is the advantage of a freeze sensor? - ANSWER-Save water during
freezing conditions, Helps prevent liability issues with hazards associated with
icy conditions
What unit can help create better uniformity in your system? - ANSWER-A
pressure regulator, Pressure compensating heads
f you have greater pressure at the heads, you will have: - ANSWER-Greater
flow and throw
If there is excessive pressure at the heads, you will have: - ANSWER-Misting
and fogging, Greater flow, but shorter throw
For an irrigation system to work, actual head pressure has to be: - ANSWER-
Equal to, or greater than minimum head pressure
For an irrigation system to operate correctly, the design pressure has to be: -
ANSWER-Equal to, or less than static water pressure
What is the term used to represent water in motion: - ANSWER-Dynamic water
To gain.433 PSI, your piping would have: - ANSWER-Elevation loss of one
foot
, A loss in PSI is a result of: - ANSWER-An elevation gain in the piping
As water flows through irrigation components, pressure loss is encountered due
to: - ANSWER-Friction Loss
Water pressure is measured in what? - ANSWER-PSI
PSI stands for: - ANSWER-Pounds per square inch
How many psi does one foot of head equal? - ANSWER-.433 PSI
How many feet of head does it take to equal one psi? - ANSWER-2.31
How many feet of head are needed to produce 86 psi? - ANSWER-198.61ft
(86/.433 = 198.61 feet of head)
What is the purpose of a gate or ball valve? - ANSWER-To act as a main shut-
off to the entire system
A valve used to protect the irrigation system from freeze damage is a: -
ANSWER-Drain valve
What can cause a valve to not shut off? - ANSWER-Loose bonnet bolts, Debris
under the Solenoid
What can prevent a valve from coming on? - ANSWER-A flow control that is
turned off, A clogged exhaust port
What ohm reading indicates a short? - ANSWER-Less than 20