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Texas Irrigator Exam – Questions & Verified Answers
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Texas Irrigator Exam – Questions & Verified AnswersA properly designed irrigation system can:
a. save water, time, and money
b. save installation time
c. cost more
d. last longer Right Ans - 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 Right Ans - c. thousands of years
The impact sprinkler head was introduced by Rain Bird in:
a. 1933
b. 1985
c. 1890
d. 1910 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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. Right Ans - absorption rate
the depth of soil in which a plant extracts most of the water it needs for
evapotranspiration Right Ans - 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 Right Ans - 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. Right Ans - 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
Right Ans - 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 Right Ans - Allowable Depletion (AD)
An electric current that reverses it direction periodically Right Ans -
Alternating Current (AC)
Any device that introduces air into the system to prevent "back siphonage."
Right Ans - 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". Right Ans - Application rate
What are the three methods in which to evaluate application rates? Right
Ans - 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 Right Ans - Aquifer
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