Texas Landscape Irrigator License Actual Exam 2026 – Questions & Answers with Rationales | 100% Verified | TCEQ Compliant | Graded A+

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Texas Landscape Irrigator License Actual
Exam 2026 – Questions & Answers with
Rationales | 100% Verified | TCEQ
Compliant | Graded A+

What can cause backsiphonage? ..........ANSWER. .... A break in the city
b b b b b b b b




mainline

Fire department using water from the city mainline to put out a fire
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If the pressure in the sprinkler system exceeds the pressure in the
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supply side, what phenomenon occurs? ..........ANSWER. Backpressure
b b b b b b




What is the unobstructed vertical distance through free atmosphere
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b between the lowest point of a water supply outlet and the flood level rim of
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the fixture or assembly into which the outlet discharges? ..........ANSWER.
b b b b b b b b b b




b b Air gap b




The vertical, physical seperations, in an air gap, must be?
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..........ANSWER. ......Atleast twice the diameter of the water supply outlet but b b b b b b b b b




never less than one inch
b b b b

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Which backflow device has to be installed 6" above the highest head
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or outlet? ..........ANSWER. AVB
b b b




The maximum number of hours an AVB can be under constant pressure?
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..........ANSWER. ......12



How high does a pressure vacuum breaker have to be installed?
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..........ANSWER. ......12" above the highest head or outlet
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Which backflow device incorporates one check valve?
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..........ANSWER. ......PVB



Which backflow device uses a pressure differential relief valve?
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..........ANSWER. ......RP



Which backflow device has to be installed 12" above grade?
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..........ANSWER. ......RP



Which of the following devices can be used if there is a health hazard?
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..........ANSWER. ......RP and PVB b b

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An electrical valve is also called? ..........ANSWER. .... Automatic control
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valve



Backsiphonage is a form of backflow that could be induced by?
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..........ANSWER. ......A break in the city main b b b b b




Poly vinyl chloride represents what type of irrigation piping?
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..........ANSWER. ......PVC



To help manage the proper scheduling of water to the landscape, you
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b need to install? ..........ANSWER.
b b b Rain, freeze, soil moisture, and wind
b b b b b




sensors
b




Which indicates matched precipitation rates? ..........ANSWER. .... Quarter
b b b b b




heads- 1GPM b




Half heads- 2GPM
b b




Three quarter heads- 3GPM
b b b




b Full heads- 4GPM
b b




Increased pressure as the head will result in? ..........ANSWER. .... Increased
b b b b b b b b




GPM and throw b b

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Excessive pressure at the head will result in? ..........ANSWER. .... Misting,
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fogging, wasted water, pattern absorption, decreased performance
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What type of sprinkler head throws a uniform sheet of water in a fixed
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or adjustable pattern? ..........ANSWER. Spray heads
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The average application rate for spray heads is? ..........ANSWER. .. ..1-3" per
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hour



Spray heads throw? ..........ANSWER. .....4-20'
b b b




Spray heads should not be defused more than? ..........ANSWER. .... 25%
b b b b b b b b




How are shrub spray mounted? ..........ANSWER. .....On various types of
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risers



Which sprinkler heads work best for large turf areas?
b b b b b b b b




..........ANSWER. ......Rotary heads b




How far to rotary heads throw? ..........ANSWER. .. ..20-40'
b b b b b b