TEXAS IRRIGATION CORE EXAM SET 2025/2026
QUESTIONS AND ANSWERS RATED A+
✔✔Key requirement for RPZ backflow - ✔✔minimum of 12" above grade
✔✔Key requirement for Double Check backflow (DCVA) - ✔✔If installed below grade,
Test cocks must be plugged with non-ferrous (non-magnetic) material
✔✔Key requirements for PVB and SVB - ✔✔Must be 12" above highest head, valve,
pipe, fitting, or fixture
✔✔Key requirements for Air Gap - ✔✔The recieving pipe must be 1" wider or 2 times
bigger than the discharge pipe
✔✔zone flow - ✔✔how many gallons go through a zone
✔✔Backflow Prevention Assembly - ✔✔Any assembly used to prevent backflow into a
potable water system. The type of assembly used is based on the existing or potential
degree of health hazard and backflow condition.
✔✔booster pump - ✔✔increases operating pressure
✔✔Bushing - ✔✔The method of adapting a fitting to either a larger or smaller size.
✔✔Check Valve - ✔✔A valve that allows flow in one direction but prevents flow in the
opposite direction.
✔✔Completion of irrigation system - ✔✔All standards are met and the irrigator is
satisfied
✔✔Class Pipe - ✔✔Class = How many pounds of pressure it can withstand before the
pipe bursts
✔✔Consulting - ✔✔Can't do it ass a tech
✔✔Control Wires - ✔✔The wires that transmit the signals to open and close from the
automatic controller to the automatic electric valves.
✔✔cross-connection - ✔✔Physical link between safe water and dirty water
✔✔cycle - ✔✔Best way to irrigate = cycle and soak
✔✔Design Pressure - ✔✔Pressure required for an emission device to work properly
, ✔✔Direct Burial Wire - ✔✔(listed UL UF) Any wire approved for direct underground
burial without conduit.
✔✔Distribution Uniformity - ✔✔How a system uniformly applies water to a zone
✔✔Drain Valve - ✔✔An automatic or manual valve used to drain water from a line after
the system has operated.
✔✔Dry Line Shock (Dry Pipe Shock) - ✔✔The shock that occurs when an opened valve
allows water to rush through empty pipe, may damage Heads or pipe due to water that's
coming out a faster rate than normal
✔✔dynamic pressure - ✔✔The pressure of water as it is moving through the system
(i.e. Working Pressure).
✔✔Emission device - ✔✔Any device that is contained within an irrigation system that is
used to apply water.
✔✔emitter - ✔✔Component within a drip line
✔✔Evapo-transpiration - ✔✔All the water a plant needs to survive
✔✔Feet of head - ✔✔.433 psi
✔✔FIP - ✔✔Female iron pipe
✔✔flow - ✔✔movement of water in a piping system
✔✔Flow-Control Valve - ✔✔A valve that can be mechanically adjusted to restrict water
flow
✔✔Flow Restrictions - ✔✔Physical restrictions in component parts of an irrigation
system that affect the flow of water thus causing a pressure loss.
✔✔Friction Loss - ✔✔Pressure loss caused by friction as water flows through the
component parts of a system
✔✔GPM - ✔✔gallons per minute
✔✔GPH - ✔✔Gallons per hour
✔✔gauge wire - ✔✔thickness of wire
QUESTIONS AND ANSWERS RATED A+
✔✔Key requirement for RPZ backflow - ✔✔minimum of 12" above grade
✔✔Key requirement for Double Check backflow (DCVA) - ✔✔If installed below grade,
Test cocks must be plugged with non-ferrous (non-magnetic) material
✔✔Key requirements for PVB and SVB - ✔✔Must be 12" above highest head, valve,
pipe, fitting, or fixture
✔✔Key requirements for Air Gap - ✔✔The recieving pipe must be 1" wider or 2 times
bigger than the discharge pipe
✔✔zone flow - ✔✔how many gallons go through a zone
✔✔Backflow Prevention Assembly - ✔✔Any assembly used to prevent backflow into a
potable water system. The type of assembly used is based on the existing or potential
degree of health hazard and backflow condition.
✔✔booster pump - ✔✔increases operating pressure
✔✔Bushing - ✔✔The method of adapting a fitting to either a larger or smaller size.
✔✔Check Valve - ✔✔A valve that allows flow in one direction but prevents flow in the
opposite direction.
✔✔Completion of irrigation system - ✔✔All standards are met and the irrigator is
satisfied
✔✔Class Pipe - ✔✔Class = How many pounds of pressure it can withstand before the
pipe bursts
✔✔Consulting - ✔✔Can't do it ass a tech
✔✔Control Wires - ✔✔The wires that transmit the signals to open and close from the
automatic controller to the automatic electric valves.
✔✔cross-connection - ✔✔Physical link between safe water and dirty water
✔✔cycle - ✔✔Best way to irrigate = cycle and soak
✔✔Design Pressure - ✔✔Pressure required for an emission device to work properly
, ✔✔Direct Burial Wire - ✔✔(listed UL UF) Any wire approved for direct underground
burial without conduit.
✔✔Distribution Uniformity - ✔✔How a system uniformly applies water to a zone
✔✔Drain Valve - ✔✔An automatic or manual valve used to drain water from a line after
the system has operated.
✔✔Dry Line Shock (Dry Pipe Shock) - ✔✔The shock that occurs when an opened valve
allows water to rush through empty pipe, may damage Heads or pipe due to water that's
coming out a faster rate than normal
✔✔dynamic pressure - ✔✔The pressure of water as it is moving through the system
(i.e. Working Pressure).
✔✔Emission device - ✔✔Any device that is contained within an irrigation system that is
used to apply water.
✔✔emitter - ✔✔Component within a drip line
✔✔Evapo-transpiration - ✔✔All the water a plant needs to survive
✔✔Feet of head - ✔✔.433 psi
✔✔FIP - ✔✔Female iron pipe
✔✔flow - ✔✔movement of water in a piping system
✔✔Flow-Control Valve - ✔✔A valve that can be mechanically adjusted to restrict water
flow
✔✔Flow Restrictions - ✔✔Physical restrictions in component parts of an irrigation
system that affect the flow of water thus causing a pressure loss.
✔✔Friction Loss - ✔✔Pressure loss caused by friction as water flows through the
component parts of a system
✔✔GPM - ✔✔gallons per minute
✔✔GPH - ✔✔Gallons per hour
✔✔gauge wire - ✔✔thickness of wire
