TCEQ IRRIGATION REVIEW TEST ANSWERS AND
QUESTIONS SET A+
✔✔CROSS-CONNECTION - ✔✔An actual or potential connection between a potable
water source and an irrigation system that may contain contaminates or pollutants or
any source of water that has been treated to a lesser degree in the treatment process.
✔✔CYCLE - ✔✔Refers to one complete operation of a controller through a program.
✔✔DESIGN - ✔✔The act of determining the various elements of a landscape irrigation
system that will include, but not limited to, elements such as collecting site specific
information, defining the scope of the project, defining plant watering needs, selecting
and laying out emission devices, locating system components, conducting hydraulics
calculations, identifying any local regulatory requirements, or scheduling irrigation work
at a site. Completion of the various components will result in an irrigation plan.
✔✔DESIGN PRESSURE - ✔✔The pressure that is required for an emission device to
operate properly. Calculated by adding the operating pressure necessary at an
emission device to the total of all pressure losses accumulated from an emission device
to the water source.
✔✔DIAPHRAGM - ✔✔That portion (flexible membrane) of an automatic valve, which
regulates the passage of water through the valve.
✔✔DIRECT BURIAL WIRE - ✔✔Any wire approved for direct underground burial
without conduit.
✔✔DISTRIBUTION UNIFORMITY - ✔✔The measure of the uniformity of irrigation water
over an area. The measure of how uniformly water is made available to the plants over
an area. Measure is expressed as a percentage and generally represents the major
component of irrigation efficiency. A measure of 1.0 (100% uniformity) represents all of
the area will receive the same amount of water.
, ✔✔DOUBLE CHECK VALVE ASSEMBLY (D.C.V.A.) - ✔✔Backflow prevention device
using two shut-off valves and two check valves assembled and pre-tested at the factory
designed to physically block the backflow of water. Used only in low health hazard
conditions.
✔✔DRAIN VALVE - ✔✔An automatic or manual valve used to drain water from a line
after the system has operated.
✔✔DRIP IRRIGATION - ✔✔The slow application (low volume) of water to the specific
root zone area of the plant material usually under low pressure.
✔✔DRY LINE SHOCK (DRY PIPE SHOCK) - ✔✔The shock, which occurs when a
section valve is opened and the water travels, unrestricted in empty lateral piping. Air in
piping is quickly voided through heads allowing velocities that would not normally occur.
May damage heads or piping.
✔✔DYNAMIC PRESSURE - ✔✔The pressure of water as it is moving through the
system. Also referred to as "Working Pressure".
✔✔EMISSION DEVICE - ✔✔Any device that is contained within an irrigation system
and that is used to apply water. Common devices in an irrigation system include, but are
not limited to, spray and rotary sprinkler heads, and drip irrigation emitters.
✔✔EMPLOYED - ✔✔Engaged or hired to provide consulting services or perform any
activity relating to the sale, design, installation, maintenance, alteration, repair, or
service to irrigation systems.
✔✔EMITTER - ✔✔A mechanical device used in drip irrigation to limit water flow to a
drip or slow trickle. Discharge rate is in gallons per hour rather than gallons per minute.
✔✔EVAPORATION - ✔✔The natural process of changing water into vapor.
✔✔EVAPO-TRANSPIRATION - ✔✔The combination of evaporation and transpiration
through plant material.
✔✔FEET OF HEAD ("FOOT-HEAD") - ✔✔A measure of pressure equivalent to .433
lbs. per square inch and equal to the weight of 1 vertical foot of water on one square
inch of surface.
✔✔FIP - ✔✔Abbreviation for "Female Iron Pipe".
✔✔FLOW - ✔✔The movement of water in a piping system.
QUESTIONS SET A+
✔✔CROSS-CONNECTION - ✔✔An actual or potential connection between a potable
water source and an irrigation system that may contain contaminates or pollutants or
any source of water that has been treated to a lesser degree in the treatment process.
✔✔CYCLE - ✔✔Refers to one complete operation of a controller through a program.
✔✔DESIGN - ✔✔The act of determining the various elements of a landscape irrigation
system that will include, but not limited to, elements such as collecting site specific
information, defining the scope of the project, defining plant watering needs, selecting
and laying out emission devices, locating system components, conducting hydraulics
calculations, identifying any local regulatory requirements, or scheduling irrigation work
at a site. Completion of the various components will result in an irrigation plan.
✔✔DESIGN PRESSURE - ✔✔The pressure that is required for an emission device to
operate properly. Calculated by adding the operating pressure necessary at an
emission device to the total of all pressure losses accumulated from an emission device
to the water source.
✔✔DIAPHRAGM - ✔✔That portion (flexible membrane) of an automatic valve, which
regulates the passage of water through the valve.
✔✔DIRECT BURIAL WIRE - ✔✔Any wire approved for direct underground burial
without conduit.
✔✔DISTRIBUTION UNIFORMITY - ✔✔The measure of the uniformity of irrigation water
over an area. The measure of how uniformly water is made available to the plants over
an area. Measure is expressed as a percentage and generally represents the major
component of irrigation efficiency. A measure of 1.0 (100% uniformity) represents all of
the area will receive the same amount of water.
, ✔✔DOUBLE CHECK VALVE ASSEMBLY (D.C.V.A.) - ✔✔Backflow prevention device
using two shut-off valves and two check valves assembled and pre-tested at the factory
designed to physically block the backflow of water. Used only in low health hazard
conditions.
✔✔DRAIN VALVE - ✔✔An automatic or manual valve used to drain water from a line
after the system has operated.
✔✔DRIP IRRIGATION - ✔✔The slow application (low volume) of water to the specific
root zone area of the plant material usually under low pressure.
✔✔DRY LINE SHOCK (DRY PIPE SHOCK) - ✔✔The shock, which occurs when a
section valve is opened and the water travels, unrestricted in empty lateral piping. Air in
piping is quickly voided through heads allowing velocities that would not normally occur.
May damage heads or piping.
✔✔DYNAMIC PRESSURE - ✔✔The pressure of water as it is moving through the
system. Also referred to as "Working Pressure".
✔✔EMISSION DEVICE - ✔✔Any device that is contained within an irrigation system
and that is used to apply water. Common devices in an irrigation system include, but are
not limited to, spray and rotary sprinkler heads, and drip irrigation emitters.
✔✔EMPLOYED - ✔✔Engaged or hired to provide consulting services or perform any
activity relating to the sale, design, installation, maintenance, alteration, repair, or
service to irrigation systems.
✔✔EMITTER - ✔✔A mechanical device used in drip irrigation to limit water flow to a
drip or slow trickle. Discharge rate is in gallons per hour rather than gallons per minute.
✔✔EVAPORATION - ✔✔The natural process of changing water into vapor.
✔✔EVAPO-TRANSPIRATION - ✔✔The combination of evaporation and transpiration
through plant material.
✔✔FEET OF HEAD ("FOOT-HEAD") - ✔✔A measure of pressure equivalent to .433
lbs. per square inch and equal to the weight of 1 vertical foot of water on one square
inch of surface.
✔✔FIP - ✔✔Abbreviation for "Female Iron Pipe".
✔✔FLOW - ✔✔The movement of water in a piping system.
