TEXAS IRRIGATION STUDY EXAMINATION TEST
2026 FULL SOLVED QUESTIONS AND
SOLUTIONS
◉ Insert Fitting. Answer: A fitting which fits inside the pipe or
tubing. Usually used on polyethylene pipe and tubing.
◉ IPS. Answer: Iron pipe size
◉ Irrigation Design. Answer: A plan showing graphic or dimensional
location of the components of an irrigation system
◉ Isolation valve. Answer: A gate or ball valve, serves as a main shut-
off device for the complete irrigation system as needed for servicing
or repair. Must be located between the meter and the backflow
devices.
◉ landscape irrigation. Answer: Art and management of applying
water to the landscape in a manner to encourage the growth of plant
material and support water conservation.
◉ Lateral Piping. Answer: Piping between the remote control valve,
not subject to constant main line pressure, and the sprinkler head.
,◉ Loop Main Line. Answer: A main line designed to provide water to
any valve from two or more directions. Generally improves
hydraulics in larger landscapes.
◉ Manifold. Answer: A group of two or more control valves together
in one location and/or valve box.
◉ Master valve. Answer: Automatic or manual valve installed at the
supply point which controls water flow into the system main line
piping.
◉ Matched precipitation (MPR). Answer: All sprinkler heads within
a watering zone will produce similar precipitation rates, regardless
of the pattern they cover.
◉ MIP. Answer: Male iron pipe
◉ MIPT. Answer: Male iron pipe thread
◉ Non-potable water. Answer: Water not safe for drinking, personal,
or culinary utilization.
, ◉ Nozzle Tree. Answer: Interchangeable nozzle assortment, with
different GPM and radii, provided with many rotary heads
◉ POC. Answer: Point of connection
◉ Polyethylene Pipe (PE). Answer: Flexible plastic pipe which uses
insert fittings.
◉ Potable water. Answer: water that is safe to drink
◉ Precipitation rate. Answer: Precipitation rate (PR) is a calculation
of the flow rate (application rate) over the square footage of the
zone. 96.25 = constant that converts gallons per minute (GPM) to
inches per hour.
◉ Pressure compensating. Answer: A method of maintaining a
constant discharge pressure regardless of inlet pressure.
◉ Pressure Regulator. Answer: Mechanical device that lowers water
pressure on the downstream side of the unit.
◉ Pressure Vacuum Breaker. Answer: A backflow prevention
assembly that incorporates a spring-loaded check valve and
introduces air into the system to prevent "back siphonage"
2026 FULL SOLVED QUESTIONS AND
SOLUTIONS
◉ Insert Fitting. Answer: A fitting which fits inside the pipe or
tubing. Usually used on polyethylene pipe and tubing.
◉ IPS. Answer: Iron pipe size
◉ Irrigation Design. Answer: A plan showing graphic or dimensional
location of the components of an irrigation system
◉ Isolation valve. Answer: A gate or ball valve, serves as a main shut-
off device for the complete irrigation system as needed for servicing
or repair. Must be located between the meter and the backflow
devices.
◉ landscape irrigation. Answer: Art and management of applying
water to the landscape in a manner to encourage the growth of plant
material and support water conservation.
◉ Lateral Piping. Answer: Piping between the remote control valve,
not subject to constant main line pressure, and the sprinkler head.
,◉ Loop Main Line. Answer: A main line designed to provide water to
any valve from two or more directions. Generally improves
hydraulics in larger landscapes.
◉ Manifold. Answer: A group of two or more control valves together
in one location and/or valve box.
◉ Master valve. Answer: Automatic or manual valve installed at the
supply point which controls water flow into the system main line
piping.
◉ Matched precipitation (MPR). Answer: All sprinkler heads within
a watering zone will produce similar precipitation rates, regardless
of the pattern they cover.
◉ MIP. Answer: Male iron pipe
◉ MIPT. Answer: Male iron pipe thread
◉ Non-potable water. Answer: Water not safe for drinking, personal,
or culinary utilization.
, ◉ Nozzle Tree. Answer: Interchangeable nozzle assortment, with
different GPM and radii, provided with many rotary heads
◉ POC. Answer: Point of connection
◉ Polyethylene Pipe (PE). Answer: Flexible plastic pipe which uses
insert fittings.
◉ Potable water. Answer: water that is safe to drink
◉ Precipitation rate. Answer: Precipitation rate (PR) is a calculation
of the flow rate (application rate) over the square footage of the
zone. 96.25 = constant that converts gallons per minute (GPM) to
inches per hour.
◉ Pressure compensating. Answer: A method of maintaining a
constant discharge pressure regardless of inlet pressure.
◉ Pressure Regulator. Answer: Mechanical device that lowers water
pressure on the downstream side of the unit.
◉ Pressure Vacuum Breaker. Answer: A backflow prevention
assembly that incorporates a spring-loaded check valve and
introduces air into the system to prevent "back siphonage"
