Nb Block 3 Irrigation

Front 1

How much does a gallon of water weigh?

Back 1

8.3lbs

Front 2

How much pressure is created with one foot of water?

Back 2

.433 psi

Front 3

What does Psi mean?

Back 3

Pounds per square inch

Front 4

How much water is needed to create one psi?

Back 4

2.32 feet

Front 5

Static pressure

Back 5

Measures water at rest

Front 6

Dynamic pressure

Back 6

Measures water in motion

Front 7

Friction loss

Back 7

Is pressure loss caused by water flowing through pipes, fittings and components

Front 8

Industry standard for friction loss in copper and PVC pipe?

Back 8

7.5ft/s in copper

5ft/s in PVC

Friction loss greater than these amounts is too great

Front 9

Back 9

Spray heads

Front 10

Back 10

Spray head

Front 11

Would spray heads be best used in small landscaped areas or large areas?

Back 11

Smaller areas

Front 12

How much pressure is required by a spray head sprinkler?

Back 12

15-30 PSI

Front 13

What are the precipitation rates of a spray head sprinkler?

Back 13

High precipitation rates

Front 14

Back 14

Gear driven rotor

Front 15

Back 15

Impact sprinkler

Front 16

How much pressure is required for Impact and Gear driven Rotors?

Back 16

25-100 Psi

Front 17

What are the precipitation rates from Impact and Gear Driven rotors?

Back 17

Lower precipitation rates than sprays

Front 18

How does water use of a drip line system compare to water use of a sprinkler?

Back 18

30%-50% less water waste

Front 19

What is the purpose of a valve?

Back 19

Control a specific group of sprinklers referred to as zones

Front 20

How does an irrigation controller reduce waste of water?

Back 20

Use of an automatic shut off device during rain events

Front 21

Where would a centrifugal pump be found?

Back 21

Ponds

Front 22

What is the most effective spacing pattern for sprinklers?

Back 22

Head to head

Front 23

Formula for figuring out precipitation rates?

Back 23

PR= 96.3 ×GPM / Area in square feet

Front 24

What is precipitation rate?

Back 24

The calculated average amount of water applied to a specific area in an hour. Typically measured in inches

Front 25

When using several different types of sprinklers and different precipitation rates, how should they be grouped together?

Back 25

Similar sprinklers and similar pre. Rates should be grouped together

Front 26

Two ways to water slopes without wasting alot of water

Back 26

Lower precipitation rates

Cycle and soak

Front 27

3 parts that should be included to an irrigation system to help with winterization

Back 27

1.Master shut off valve

2. Drain valve

3. Air compressor hookup

Front 28

How do you check the water pressure of your water source?

Back 28

Fill a 5 gallon bucket.

Time it.

Figure out how fast it would fill in one minute

Front 29

The spot where you connect your irrigation system to the water source

Back 29

Point of connection

P.O.C.

Front 30

2 types of Backflow

Back 30

1.Back pressure

2.Backsiphonage

Front 31

Back pressure happens when

Back 31

The pressure in the system downstream is greater than the upstream water supply.

Ex. Happens when the pipe is clogged

Front 32

Backsiphonage is caused by

Back 32

Reduced pressure in the system

Ex. Leak

Front 33

How do you know which direction to install a backflow prevention device?

Back 33

The arrow will point in the direction of the flow

Front 34

2 devices that can be installed to prevent backsiphonage

Back 34

Pressure vacuum breaker (PVB)

Atmospheric Vacuum breaker (AVB)

Front 35

To prevent backsiphonage AND back pressure install a

Back 35

Reduced Pressure Assembly (RPA)

or a Double Check Valve Assembly (DCA)

Front 36

3 types of irrigation controllers

Back 36

1. Electro mechanical

2. Electronic

3. Central Control Systems

Front 37

Laterals

Back 37

Smaller pipes that supply water to the sprinklers

Front 38

These types of valves are opened and closed manually

Back 38

Shut off valves

Front 39

Irrigation wiring. What does the wiring connect?

Back 39

The main controller to individual valves

Front 40

What gauge wire is used for commercial irrigation?

Back 40

Single strand, 12 or 14 gauge

Front 41

What gauge of wire is used for residential systems?

Back 41

Multi strand, 16 or 18 gauge

Front 42

What is the ideal air pressure to use for clearing pipes of water for the winter?

Back 42

75-90 psi

Front 43

When winterizing irrigation systems what order do you clear the valves in?

Back 43

Manually open the highest or furthest valves from the point of connection and move towards the P.O.C.

Front 44

How do you winterize the controller for the irrigation system

Back 44

Turn off the controller.

Do not unplug it

Front 45

Which type of irrigation is recorded in gallons per hour?

Back 45

Drip irrigation

Front 46

Order of irrigation installation from water source

Back 46

Point of connection

Backflow preventer

Master shut off valve

Main line

Laterals

Sprinklers