A properly designed irrigation system can:
a. save water, time, and money
b. save installation time
c. cost more
d. last longer - ANSWER a. save water, time, and money
Basic irrigation dates back:
a. hundreds of years
b. since Rain Bird was founded
c. thousands of years
d. seventy-five years - ANSWER c. thousands of years
The impact sprinkler head was introduced by Rain Bird in:
a. 1933
b. 1985
c. 1890
d. 1910 - ANSWER a. 1933
Landscape irrigation, as we know it, has been around since:
a. the 1930's
b. since the development of PVC pipe
c. the beginning of time
d. the turn of the 20th century - ANSWER d. the turn of the 20th century
The issue of top priority in irrigation today is:
a. how to sell more systems in our present economy
b. new technology in back flow protection
c. water conservation
d. city and state regulations on licensing - ANSWER c. water conservation
The shortage of water is a result of:
a. water being a fixed resource
b. a decrease in the population
c. a decrease in water usage per person
d. larger sprinkler heads - ANSWER a. water being a fixed resource
Possible solutions to the scarcity of water include:
a. allowing only rock and desert landscapes
b. watering only once a week
c. promoting Xeriscaping
,d. limiting irrigation systems to commercial properties only - ANSWER c. promoting
Xeriscaping
Which is not a possible solution for the scarcity of water?:
a. Xeriscaping
b. efficient landscape irrigation
c. construction of more dams
d. use of recycled water - ANSWER c. construction of more dams
One of the seven basic landscaping principles of Xeriscaping is:
a. larger turf areas
b. only rock landscapes
c. soil removal
d. mulching - ANSWER d. mulching
Efficient irrigation is geared more directly toward:
a. manufactures, irrigation contractors, homeowners, and proper education
b. federal government
c. city government
d. state government - ANSWER a. manufactures, irrigation contractors,
homeowners, and proper education
Manufactures can impact water conservation by producing:
a. products at a lower cost
b. better low-volume irrigation products
c. sizing components properly
d. more efficient irrigation scheduling - ANSWER b. better low-volume irrigation
products
Which of the following is not a basic principle of Xeriscaping:
a. mulching
b. efficient irrigation
c. sizing components
d. proper maintenance - ANSWER c. sizing components
Pressure compensating devices help save water because they:
a. keep the water pressure high enough for good coverage
b. compensate for the lack of a good decision
c. help eliminate misting or fogging at the sprinkler heads
d. allow for fewer heads, thus less water used - ANSWER c. help eliminate misting
or fogging at the sprinkler heads
For irrigation contractors, water conservation starts with:
a. the proper back flow device
b. a great design
c. a good maintenance contract
d. the city irrigation regulations - ANSWER b. a great design
The proper watering time is early morning because:
a. homeowners will not get water when leaving the house
,b. the city inspectors will not see your system run longer than allowed
c. sprinkler patters are generally less distorted from the wind
d. most homeowners don't want to see the water running - ANSWER c. sprinkler
patterns are generally less distorted from the wind
The art and management of applying water to the landscape to encourage the
growth of plant material and support water conservation is:
a. landscape irrigation
b. an irrigation system
c. an irrigation design
d. good for business and the environment - ANSWER a. landscape irrigation
the rate (or speed) at which soil will accept water. The speed at which water can
penetrate or infiltrate the soil. Also called percolation or infiltration rate. As the soil
"capacity" is reached, the absorption rate will decrease. It is affected by soil type,
slope, run-off, etc. Different soil types absorb water at a different rate. - ANSWER
absorption rate
the depth of soil in which a plant extracts most of the water it needs for
evapotranspiration - ANSWER active root zone
The operating pressure measured at the base of a sprinkler head. Actual head
pressure is calculated by deducting total pressure losses from the static water
pressure. ---- has to be equal to, or greater than, the minimum head pressure, for a
given sprinkler head to function correctly - ANSWER Actual head pressure
An approved ---- is the unobstructed vertical distance through free atmosphere
between the lowest pint of water supply outlet and the flood level rim of the fixture or
assembly into which the outlet discharges. There vertical, physical separations must
be at least twice the diameter of the water supply outlet, but never less than 1 in. -
ANSWER Air Gap
Small device used on some subsurface drop irrigation that allows air into the
dripperline when the system is not running which eliminates any vacuum that could
result in debris or contaminants being sucked into the piping system - ANSWER
Air/Vacuum Relief Valve
The amount of water, in irrigation management, that is allowed to be depleted from
the plant available water before an irrigation event is scheduled. Also referred to as
Managed Allowable Depletion (MAD). Generally, 50% depletion is the rule of thumb -
ANSWER Allowable Depletion (AD)
An electric current that reverses it direction periodically - ANSWER Alternating
Current (AC)
Any device that introduces air into the system to prevent "back siphonage." -
ANSWER Anti-Siphon Device
, Rate at which water is applied by sprinkler heads in a certain pattern. Usually
measured in inches per hour, gallons per hour or gallons per day. Commonly called
"precipitation rate". - ANSWER Application rate
What are the three methods in which to evaluate application rates? - ANSWER 1. a
densogram
2. Precipitation rate formula
96.3 x total GPM / total area
3. a water audit
An underground layer or porous rock, sand, etc. containing water, into which wells
can be sunk - ANSWER Aquifer
The surface area of the landscape to which a sprinkler head will provide water.
Usually described in degrees or part of a full circle head. The degrees of coverage of
a sprinkler from one side of a pattern to the other. - ANSWER Arc
Scale expressing foot measurements in parts of an inch - ANSWER Architect Scale
A corrected or redrawn plan showing the "actual scaled" location of all major
components of the system and other information the property owner might require.
An ---- is an individual tool form irrigators to locate major components at a later date -
ANSWER As-Built Plan
A back flow prevention device that allows air into the piping system, with the use of a
float that moves up and down, to prevent backsiphonage. No back pressure can
exist for proper operation. It cannot be under constant pressure for more than 12
hours in any 24- hour period. This device must be installed vertically and a minimum
of 6' higher than all down stream piping and the highest downstream head or outlet.
There cannot be any shut off valves downstream of the ---. A separate --- must be
installed on the discharge side of each control valve, between the valve and all
emission devices. - ANSWER Atmospheric Vacuum Breaker (AVB)
An electrical or hydraulic control valve in a sprinkler system which is activated by an
automatic controller. Also called a section valve, circuit valve, zone valve, remote
control valve, electrical valve, or hydraulic valve - ANSWER Automatic Control Valve
An irrigation system which will automatically cycle (water) according to a preset
program - ANSWER Automatic System
Water (measured in inch of water per inch of soil) that is actually accessible for the
plant to use - ANSWER Available Water
What does AWWA stand for? - ANSWER American Water Works Association
An unwanted reversal of the flow of water in a piping system which can potentially
allow non-potable water to pollute or contaminate the potable water supply. Caused
by back pressure or backsiphonage - ANSWER Backflow
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