Irrigation Technician Study Guide Texas

Front 1

Absorption rate

Back 1

the rate (or speed) at which soil will accept water

Front 2

Actual head pressure

Back 2

The operating pressure measured at the base of a sprinkler head

Front 3

Air gap

Back 3

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

Front 4

Air/ vacuum relief valve

Back 4

Small device used on some subsurface drip irrigation that allows air into the drip line when the system is not running which eliminates any vacuum that could result in debris or contaminants being sucked into the piping system

Front 5

application rate

Back 5

Rate at which water is applied by sprinkler heads in a certain pattern usually measured in inches per hour gallons per hour or gallons per day commonly called participation rate

Front 6

Arc

Back 6

The surface area of a landscape to which a sprinkler head will provide water example 90 degree 120 degree 180 degree to 240 degree 270 degree and 360 degree

Front 7

As built plan

Back 7

A correct or redrawn plan showing the actual scaled location of all major components of the system and other information

Front 8

Atmospheric vacuum breaker

Back 8

AVB - A backflow prevention device that allows air into the piping system with the use of a flow that moves up and down to prevent back siphonage (it cannot be under constant pressure for more than 12 hours in a 24 period)

Front 9

back pressure

Back 9

Any condition that could create pressure in a discharge (Outlet or Downstream) side of a piping system that is greater than that of the supply (Inlet or Upstream) side of the system

Front 10

Back siphonage

Back 10

A break in the city main line or a fire department utilizing excessive water to fight a nearby fire could both indicate

Front 11

Backflow prevention methods

Back 11

☆An air gap

☆An atmospheric vacuum breaker (avb)

☆A pressure vacuum breaker (pvb)

☆A double check valve assembly (dca)

☆A reduce pressure principle device (rp)

Front 12

check valve

Back 12

a valve which permits water to flow in One Direction

Front 13

Class pipe

Back 13

A method by which PVC pipe is grouped accordingly to the working pressure. all sizes in that class have the same working pressure class 125, class 160, class 200, class 315,

Front 14

Controller

Back 14

In automatic timing device which signals the automatic valve to open or close according to the prescribe program

Front 15

Double check valve assembly (DCVA)

Back 15

Backflow prevention assembly, usually two shut-off valves and two check valves assembled and pre tested at factory design to physically block or prevent the backflow of water

Front 16

Drip irrigation

Back 16

The slow application low volume of water to a specific root Zone area of a plant mineral using very low pressure usually expressed in GPH gallons per hour

Front 17

Dry line shock (dry pipe shock)

Back 17

The shock which occurs when a valve is open and the water travels unrestricted in empty piping

Front 18

Dynamic water

Back 18

Water that is in motion through the system

Front 19

Elevation gain

Back 19

Pressure gained as water is used downhill from its source

Front 20

Elevation lost

Back 20

Pressure loss as water is used uphill from its source

Front 21

Emitters

Back 21

A small mechanical device (used in drip irrigation) to limit water flow to a drip or slow Trickle

Front 22

Evaporation

Back 22

The natural process of changing water into vapor

Front 23

Evaportranspiration (et)

Back 23

The combination of water that has evaporated from the soil and transpired from the plant minerals.

Front 24

FPS

Back 24

Feet per second

Front 25

Friction loss

Back 25

Pressure loss due to friction as water flows through all components of a system

Front 26

Gauge wire

Back 26

Standards used for wire sizing. The large the gates number, the smaller the wire diameters

Front 27

GPH

Back 27

Gallons per hour

Front 28

GPM

Back 28

Gallons per minute

Front 29

Hazard degree of

Back 29

A measure of the degree of risk or harm to the public health for example the term is used to categorize an irrigation system as a non health or a health hazard

Front 30

Head-to-head spacing

Back 30

Spacing of heads that is equal to the published radius of the head this is also referred to as 50% spacing because it is 50% of the day I'm over the head

Front 31

HydroZone

Back 31

An irrigation area encompassing plant material with similar watering requirements due to environmental

Front 32

Isolation valve

Back 32

generally a gate or ball valve serves as a main shut off valve device for a complete irrigation system

Front 33

Lateral piping

Back 33

Piping between the remote control valve not subject to content main line pressure and the sprinkler head

Front 34

Main line

Back 34

That protion of the irrigation piping normally under constant pressure located between the water source and remote control valve or quick coupler valve

Front 35

Master valve

Back 35

An automatic or manual valve installed at the supply point which controls water flow into the system main line piping

Front 36

Matched participation

Back 36

all sprinkler heads within a watering Zone will produce similar participation rates regardless at the pattern or arc they cover

Hint 36

If a full circle 360 degrees head delivers for GPM, then half a circle 180-degree head of the same type will produce half that amount or 2 GPM

Front 37

Non potable water

Back 37

Water nor suitable for human consumption

Front 38

Nozzle tree

Back 38

Refers to the intouchable nozzles assortment with different G.P.M. and radii provided with many rotary heads

Front 39

POC

Back 39

Point of connection is the location where a connection is made mostly commonly on the service line followed by an installation of a backflow device

Front 40

Polyethylene pipe (P.E.)

Back 40

Flexible plastic pipe which use insert fittings

Front 41

Pressure compensating

Back 41

A method of maintaining a constant discharge pressure regardless of Inlet pressure (there should not be more than a 10% difference in pressure from the first head on a Zone, two the last head)

Front 42

Pressure regulator

Back 42

A mechanical device that lowers the water pressure on the downstream side of the unit

Front 43

P.V.C. PIPE

Back 43

Poly vinyl chloride pipe

Front 44

Sensors

Back 44

Refers generally to four types of irrigation sensors units that automatically assist in the management of irrigation scheduling and water conservation

Freeze sensor

Rain sensor

Wind sensor

Soil moisture sensor

Front 45

Service line

Back 45

Generally referred to the piping from the city main to the water meter

Front 46

Sleeves

Back 46

Piping or conduct under hardscapes( driveways, walks) for the purpose of running pipe or wiring

Front 47

Slope

Back 47

A measure of rate of change of elevation over a prescribed distance

Hint 47

Rise/ run

Front 48

static water

Back 48

Refers to water that is not moving

Front 49

Swing joint

Back 49

A flexible joint (composed of a series of threaded rise and three elbow connections) or pipe connecting a sprinkler head to a pipe

Hint 49

Intended to prevent damage to the Head due to heavy foot traffic, equipment, exedra

Front 50

Hydraulics

Back 50

Is the study of fluid while in motion or at rest

Front 51

Weight of one cubic foot

Back 51

62.4 pounds

Front 52

PSI

Back 52

Pounds per square inch

Front 53

Maximum acceptable velocity water in PVC piping

Back 53

5 feet per second (FPS)

Front 54

Maximum acceptable velocity of water in copper piping

Back 54

9 feet per second (fPS)