TCEQ IRRIGATION STANDARD EXAMS ANSWERS
AND QUESTIONS SET A+
✔✔NOZZLE TREE - ✔✔Refers to the interchangeable nozzle assortment, with different
G.P.M., provided with many rotor heads.
✔✔P.O.C. - ✔✔Abbreviation for "Point-of-Connection".
✔✔P.S.I. - ✔✔Abbreviation for "Pounds-per-Square-Inch".
✔✔P.V.C. PIPE - ✔✔Abbreviation for unplasticized PolyVinyl Chloride pipe.
✔✔PASS-THROUGH CONTRACT - ✔✔A written contract between a contractor or
builder and a licensed irrigator or exempt business owner to perform part or all of the
irrigation services relating to an irrigation system.
✔✔POLYETHYLENE PIPE - ✔✔Flexible plastic pipe which uses insert fittings for
flexible connection between lateral pipe and head.
✔✔POTABLE WATER - ✔✔Water suitable for human consumption. It can be used for
irrigation systems as long as approved backflow prevention is used to protect the water
supply.
✔✔PRECIPITATION RATE - ✔✔The speed at which a sprinkler or an irrigation system
applies water. It is usually measured in inches per hour or gallons per hour.
✔✔PRESSURE COMPENSATING - ✔✔A method of maintaining a constant discharge
pressure regardless of inlet pressure.
✔✔PRESSURE LOSS - ✔✔The loss of pressure under flow conditions caused by
friction or changes in elevation.
✔✔PRESSURE RATING - ✔✔A method of controlling the wall thickness of PVC pipe so
all sizes of pipe in a "class" have this same rating.
, ✔✔PRESSURE RELIEF VALVE - ✔✔A valve which will open when the inlet pressure
exceeds a pre-set pressure.
✔✔PRESSURE VACUUM BREAKER - ✔✔A backflow prevention assembly that
introduces air into the system to prevent back siphonage. Incorporates the use of a
spring loaded seat for positive opening to atmosphere. This assembly can be under
constant pressure. Commonly used for high hazard application where there is no back
pressure. Assembly must be installed at least 12" above all downstream piping and
downstream outlets.
✔✔PUMP CIRCUIT - ✔✔The optional "switch" on some automatic controllers which
energizes a pump (starter) when controller operation begins.
✔✔QUICK COUPLER KEY - ✔✔A bronze tube with a handle which inserts into a quick
coupling valve for supplemental water. May be fitted with a hose swivel.
✔✔QUICK COUPLING VALVE - ✔✔A constantly pressurized valve set vertically in the
ground to provide supplemental water when a quick coupler key "is inserted" and turned
one and a quarter revolutions.
✔✔R.P. OR R.P.Z. - ✔✔Reduced pressure zone backflow prevention assembly
commonly used for high hazard applications. A combination of check valves and an air
chamber or zone which will open to atmosphere when failure occurs.
✔✔RECLAIMED WATER - ✔✔Domestic or municipal wastewater which has been
treated to a quality suitable for beneficial use, such as landscape irrigation.
✔✔RECORD DRAWING - ✔✔A drawing of installed irrigation system showing the
location of major components either scaled on the drawing or shown by dimension not
to scale.
✔✔RECORDS OF LANDSCAPE IRRIGATION ACTIVITIES - ✔✔The irrigation plans,
contracts, warranty information, invoices, copies of permits, and other documents that
relate to the installation, maintenance, alteration, repair, or service of a landscape
irrigation system.
✔✔S.D.R. - ✔✔Abbreviation for "standard dimension ratio". Relates to wall thickness of
Class PVC pipe. No wall thickness can be less than .060 inches.
✔✔SADDLE - ✔✔A type of fitting which attaches around the pipe. A hole is drilled
through the pipe to furnish water to the outlet of the saddle which is usually threaded
F.I.P.
AND QUESTIONS SET A+
✔✔NOZZLE TREE - ✔✔Refers to the interchangeable nozzle assortment, with different
G.P.M., provided with many rotor heads.
✔✔P.O.C. - ✔✔Abbreviation for "Point-of-Connection".
✔✔P.S.I. - ✔✔Abbreviation for "Pounds-per-Square-Inch".
✔✔P.V.C. PIPE - ✔✔Abbreviation for unplasticized PolyVinyl Chloride pipe.
✔✔PASS-THROUGH CONTRACT - ✔✔A written contract between a contractor or
builder and a licensed irrigator or exempt business owner to perform part or all of the
irrigation services relating to an irrigation system.
✔✔POLYETHYLENE PIPE - ✔✔Flexible plastic pipe which uses insert fittings for
flexible connection between lateral pipe and head.
✔✔POTABLE WATER - ✔✔Water suitable for human consumption. It can be used for
irrigation systems as long as approved backflow prevention is used to protect the water
supply.
✔✔PRECIPITATION RATE - ✔✔The speed at which a sprinkler or an irrigation system
applies water. It is usually measured in inches per hour or gallons per hour.
✔✔PRESSURE COMPENSATING - ✔✔A method of maintaining a constant discharge
pressure regardless of inlet pressure.
✔✔PRESSURE LOSS - ✔✔The loss of pressure under flow conditions caused by
friction or changes in elevation.
✔✔PRESSURE RATING - ✔✔A method of controlling the wall thickness of PVC pipe so
all sizes of pipe in a "class" have this same rating.
, ✔✔PRESSURE RELIEF VALVE - ✔✔A valve which will open when the inlet pressure
exceeds a pre-set pressure.
✔✔PRESSURE VACUUM BREAKER - ✔✔A backflow prevention assembly that
introduces air into the system to prevent back siphonage. Incorporates the use of a
spring loaded seat for positive opening to atmosphere. This assembly can be under
constant pressure. Commonly used for high hazard application where there is no back
pressure. Assembly must be installed at least 12" above all downstream piping and
downstream outlets.
✔✔PUMP CIRCUIT - ✔✔The optional "switch" on some automatic controllers which
energizes a pump (starter) when controller operation begins.
✔✔QUICK COUPLER KEY - ✔✔A bronze tube with a handle which inserts into a quick
coupling valve for supplemental water. May be fitted with a hose swivel.
✔✔QUICK COUPLING VALVE - ✔✔A constantly pressurized valve set vertically in the
ground to provide supplemental water when a quick coupler key "is inserted" and turned
one and a quarter revolutions.
✔✔R.P. OR R.P.Z. - ✔✔Reduced pressure zone backflow prevention assembly
commonly used for high hazard applications. A combination of check valves and an air
chamber or zone which will open to atmosphere when failure occurs.
✔✔RECLAIMED WATER - ✔✔Domestic or municipal wastewater which has been
treated to a quality suitable for beneficial use, such as landscape irrigation.
✔✔RECORD DRAWING - ✔✔A drawing of installed irrigation system showing the
location of major components either scaled on the drawing or shown by dimension not
to scale.
✔✔RECORDS OF LANDSCAPE IRRIGATION ACTIVITIES - ✔✔The irrigation plans,
contracts, warranty information, invoices, copies of permits, and other documents that
relate to the installation, maintenance, alteration, repair, or service of a landscape
irrigation system.
✔✔S.D.R. - ✔✔Abbreviation for "standard dimension ratio". Relates to wall thickness of
Class PVC pipe. No wall thickness can be less than .060 inches.
✔✔SADDLE - ✔✔A type of fitting which attaches around the pipe. A hole is drilled
through the pipe to furnish water to the outlet of the saddle which is usually threaded
F.I.P.
