Installation

Question 1

When calculating the available water capacity of an irrigation site, irrigators refer to that amount in

Answer 1

GPM [2]

Question 2

3. When using drip irrigation, the water volume of individual drip emitters is generally expressed in:

Answer 2

GPH

Question 3

An irrigator is required to maintain records of irrigation installations for a period of:

Answer 3

3 YEARS

Question 4

A licensed irrigator inspector cannot engage in irrigation services that include: A licensed irrigator inspector cannot engage in irrigation services that include:

a). 	Selling b). Designing c). 	Installing c). 	Repairing d). All of the above

Answer 4

d). All of the above

Question 5

Landscape irrigation, as we know it, has been around since:
a). The 1930’s
b). Since the development of PVC pipe
c). The beginning of time
d). The turn of the 20th century

Answer 5

d). The turn of the 20th century

Question 6

For an irrigation system to work, actual head pressure has to be:
a). Less than minimum head pressure
b). Equal to minimum head pressure
c). Greater than minimum head pressure
d). Equal to, or greater than minimum head pressure

Answer 6

a). Less than minimum head pressure

Question 7

Which of the following describes the rate at which water is applied by sprinkler heads in a certain pattern:
A)Precipitation rate
b). Infiltration rate
c). Application rate
d). Percolation rate
e). A & C

Answer 7

A)Precipitation rate

Question 8

Static Pressure minus total pressure losses equals:
DESGIN PRESSUIRE
b). Actual head pressure
c). Minimum head pressure
d). Pressure to design to

Answer 8

b). Actual head pressure

Question 9

The arc is defined as the:
a). Application rate
b). Percolation rate
c). The trajectory of sprinkler heads
d). Degrees of coverage of a sprinkler from one side of a pattern to the other side.

Answer 9

d). Degrees of coverage of a sprinkler from one side of a pattern to the other side.

Question 10

A timing device which signals the automatic valves to open close is ?
A). An Irrigation timer
b). A Clock
c). An Irrigation controller
d). All of the above

Answer 10

d). All of the above

Question 11

28. Design pressure is:

a). Static pressure plus the total of all pressure losses
b). Static pressure minus the total of all pressure losses
c). Minimum head pressure plus the total of all pressure losses
d). Minimum head pressure minus total of all pressure losses

Answer 11

c). Minimum head pressure plus the total of all pressure losses

Question 12

The flexible portion of the remote control valve which regulates the passage of water through the valve is called.
a).diaphragm
b). The solenoid
c). The flow control
d). External manual bleed

Answer 12

a). A diaphragm

Question 13

. To gain .866 PSI, your piping would have:
. A) Elevation gain of one foot
b). A pump installed
c). Increased water speed
d). Elevation loss of two feet

Answer 13

d). Elevation loss of two feet

Question 14

loss of .433 PSI is a result of:
a). A piping elevation loss of 1 foot
b). A restriction in the line
c). An piping elevation gain of 1 foot
An elevation gain or loss in the piping

Answer 14

c). An piping elevation gain of 1 foot
An elevation gain or loss in the piping

Question 15

A method of maintaining a constant discharge pressure regardless of inlet pressure is called
a). A pressure relief valve
b). Optimum pressure at the head
c). Pressure compensating
d). Minimum head pressure

Answer 15

c). Pressure compensating

Question 16

Calculating and managing the time and amount of water to apply to the plant material is referred to as:
a). Scheduling
b). Management of water
d). Water application
d). Programming

Answer 16

a). Scheduling

Question 17

Which represents matched precipitation rates?
a). full, half, quarter circle all 4 GPM
b). quarter circle 2.5 GPM, half circle 5 GPM, full circle 10 GPM
c). all heads, regardless of pattern, throwing the exact GPM
d). quarter heads 1 GPM, half heads 2 GPM, full heads 3 GPM
e). None of the above

Answer 17

b). quarter circle 2.5 GPM, half circle 5 GPM, full circle 10 GPM

Question 18

50. Increased pressure at the head will result in:
    a). Damage to the head
    b). Better performance
    c). An increase in GPM and radius
    d). A decrease in radius and increase in GPM

Answer 18

c). An increase in GPM and radius

Question 19

56. Bubblers would need to be installed in an area that is:
    a) For trees
    b). On a slope
    c). Level and bordered
    d). Very small

Answer 19

c). Level and bordered

Question 20

58. A filter, flush valve, and pressure regulator would typically be used with:
    a). Flood bubblers
    b). Drip irrigation
    c). Micro-sprays
    d). Rotary sprinklers

Answer 20

b). Drip irrigation

Question 21

61. What does a check valve do?

a). Allows water to go in only one direction
b). Checks for breaks in the lines
c). Monitors water usage
d). Allows water to shut off in case of a break

Answer 21

a). Allows water to go in only one direction

Question 22

What types of copper pipe are available and which has the heaviest wall thickness
a). K, M, and O with all the same thickness
b). K, L, and M with K having the heaviest wall thickness
c). K, L, and M with L having the heaviest wall thickness
d). Only K

Answer 22

b). K, L, and M with K having the heaviest wall thickness

Question 23

How is the smoothness on the inside of the pipe rated?
a). A-factor
b). It is not rated
c). How long the pipe will last
d). C-factor

Answer 23

d). C-factor

Question 24

69. ET-based controllers regulate the irrigation schedule based on what?

a). Evaporation
b). Transpiration
c). Evapotranspiration
d). Federal watering guidelines
e). A, B, and C

Answer 24

e). A, B, and C

Question 25

72. How many members, licensed irrigators, and members that are representatives of the public does the irrigator advisory council have? a). 9, 5, and 4 b). 9, 6, and 3 c). 6, 3, and 3 d). 10, 5, and 5

Answer 25

b). 9, 6, and 3

Question 26

75. How ❏❏ many hours of CEU’s does a licensed irrigator need to renew his/her three year license? a). 8 b). 12 c). 24 d). 16

Answer 26

c). 24

Question 27

83. Which of the following is not acceptable? a). Threading a plastic fitting into a metal fitting b). Threading a metal fitting into a plastic fitting c). Threading a metal fitting into a metal fitting d). Threading a plastic fitting into a plastic fitting

Answer 27

b). Threading a metal fitting into a plastic fitting

Question 28

What happens if two different types of metal pipes are connected together? a). Electrolysis b). A pressure problem c). Contamination d). Pollutionff

Answer 28

a). Electrolysis

Question 29

Which devices can stop backpressure? a). PVB, DCA, RP, and AVB b). RP, DCA, and PVB c). AVB and PVB d). PVB and DCA e). DCA and RP

Answer 29

e). DCA and RP

Question 30

Which devices can handle constant pressure? a). PVB, DCA, RP, and AVB b). DCA and RP c). RP, DCA, and PVB d). AVB and PVB e). PVB and DCA

Answer 30

c). RP, DCA, and PVB

Question 31

The approved backflow devices for non-health hazards include: a). AVB & RP b). RP, DCA, and PVB c). AVB and PVB d). PVB and DCA e). All devices (AVB, PVB, DCA, and RP)

Answer 31

e). All devices (AVB, PVB, DCA, and RP)

Question 32

If there is an on-site sewage facility on site, which backflow is approved? a). AVB b). PVB c). DCA d). RP e). B & C

Answer 32

d). RP

Question 33

If major maintenance has to be performed, which backflow device has to be properly installed prior to the repair work being performed? a). An approved backflow device b). PVB c). DCA or PVB d). RP e). B & C

Answer 33

a). An approved backflow device

Question 34

If a DCA is installed below ground, what device is required? a). A filter b). A flush valve c). A pressure regulator on the downstream side of the DCA d). A Y-Strainer installed on the inlet side of the DCA e). Installing at least 12” deep

Answer 34

d). A Y-Strainer installed on the inlet side of the DCA

Question 35

If there is an additional water source supplying water to a system being supplied by a potable water supply, what device has to be used on with the potable water supply? a). AVB b). PVB c). DCA d). RP e). C or D

Answer 35

d). RP

Question 36

13. What device cannot be used when there is a health hazard? a). AVB b). PVB c). DCA d). RP e). A and B

Answer 36

c). DCA

Question 37

An Atmospheric Vacuum Breaker: a). Will stop backpressure b). Has to be installed 6” higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backsiphonage c). Has to be installed 12” higher than the highest head or outlet in the retracted position, will handle constant pressure, and will stop backsiphonage d). Has to be installed 6” higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backpressure e). A and B

Answer 37

b). Has to be installed 6” higher than the highest head or outlet in the retracted position, will not handle constant pressure, and will stop backsiphonage

Question 38

what is the unwanted reversal of water flow in an irrigation system? a). Backpressure b). Contamination c). Pollution d). Backflow

Answer 38

b). Contamination

Question 39

20. If the pressure in the sprinkler system (or downstream side) exceeds the pressure in the supply side, what phenomenon can occur? a). Backpressure b). Misting heads c). Increased performance at the sprinkler heads d). Backsiphonage

Answer 39

a). Backpressure

Question 40

21. What can cause backpressure? a). Gravity or a pump b). Sub atmospheric pressure c). A break in the city main d). All of the above

Answer 40

a). Gravity or a pump

Question 41

26. What is the maximum number of hours an AVB can have constant pressure? a). 2 b). 6 c). 12 d). 8

Answer 41

c). 12

Question 42

27. How high does a pressure vacuum breaker have to be installed? a). 6” above the highest head or outlet b). 12” above the highest head or outlet c). 12” above the grade d). 12” above the highest head or outlet in the retracted position

Answer 42

d). 12” above the highest head or outlet in the retracted position

Question 43

30. Which backflow devices incorporate two check valves? a). DC b). RP c). AVB d). PVB e). A and B

Answer 43

d). PVB

Question 44

32. How many test cocks are there on a DCA, rP, PVB, and AVB, respectively? a). 4, 4, 2, and 0 b). 0, 2, 4, and 4 c). 4, 4, 4, and 4 d). 2, 2, 4, and 2

Answer 44

a). 4, 4, 2, and 0

Question 45

2. If the gPM are doubled, the PSI: a). doubles. b). triples. c). quadruples. d). stays the same.

Answer 45

c). quadruples.

Question 46

3. Hydraulics is: a). water in motion. b). the science of dynamic and static water. c). the study of irrigation designs. d). study of water pressure.

Answer 46

b). the science of dynamic and static water.

Question 47

4. What is the weight of one gallon of water? a). 8.3 pounds b). 7.3 pounds c). 62.4 pounds d). 3.8 pounds

Answer 47

a). 8.3 pounds

Question 48

5. 62.4 pounds represents the weight of: a). 5 gallons of water. b). a liter of water. c). a gallon of water. d). a cubic foot of water.

Answer 48

d). a cubic foot of water.

Question 49

7. How many feet of water (in height) does it take to equal 1 PSI? a). .433 b). 2.31 c). .866 d). 4.33

Answer 49

b). 2.31

Question 50

8. One foot high of water will create: a). 4.62 PSI b). 2.31 PSI c). .433 PSI d). .866 PSI

Answer 50

c). .433 PSI

Question 51

9. How many feet of head are needed to produce 65 psi? a). 28.2 b). 100 c). 150.1 d). 37.4

Answer 51

c). 150.1 65 ÷ .433 = 150.12 feet of head

Question 52

30. A separate calculation is needed if: a). The type of pipe is different b). The GPM are different c). The size of the pipe is different d). All of the above

Answer 52

d). All of the above

Question 52

10. If you have 167 feet of head, what is the psi? a). 385.7 b). 83.5 c). 118.31 d). 72.3

Answer 52

d). 72.3

Question 53

21. If your pipe is flowing 34 gpm, what size pipe should be used? a). Class 200 ½” b). Class 200 1 ½” c). Class 200 1 ¼” d). Class 200 1”

Answer 53

b). Class 200 1 ½”

Question 53

28. What is not considered in selecting the most taxed zone to work the hydraulics? a). Most GPM b). Furthest distance c). Highest elevation d). Lowest elevation

Answer 53

d). Lowest elevation

Question 53

29. Which one of these is a rule to follow when working hydraulics? a). Take the most direct route from the point in question back to the city main or point in question b). Take the most direct route from the point in question back to the main line or point in question c). Pick up the GPM at intersections, but don’t calculate the friction losses on any of the pipe running to those sprinkler heads. d). A & C

Answer 53

d). A & C

Question 53

12. An elevation gain in the piping will yield: a). a gain in psi. b). no change in psi. c). loss in psi. d). a difference in FPS.

Answer 53

c). loss in psi.

Question 53

13. An elevation loss in the piping will yield: a). a decrease in psi. b). an increase in psi. c). equal velocity. d). an increase in velocity.

Answer 53

b). an increase in psi.

Question 53

14. What is the maximum acceptable velocity of water in pvc piping? a). 6 fps b). 10 fps c). 5 fps d). 9fps

Answer 53

c). 5 fps

Question 54

15. What is the maximum acceptable velocity of water in copper piping? a). 6 fps b). 10 fps c). 5 fps d). 9fps

Answer 54

d). 9fps

Question 55

1. An engineer scale is: a). A measuring device that has measurements as a given number of feet per inch. b). A measuring device that has measurements as a given number of inches per foot. c). A measuring device in which a fraction of an inch equals 1 foot. d). None of the above.

Answer 55

a). A measuring device that has measurements as a given number of feet per inch.

Question 56

2. In calculating the available water capacity, pressure loss through the water meter should not exceed what percentage of the minimum static water pressure available? a). 5 b). 15 c). 25 d). 10

Answer 56

d). 10

Question 57

3. The maximum water flow through the water meter should not exceed: a). 75% of the safe flow of the meter. b). 50% of the safe flow of the meter. c). 25% of the safe flow of the meter. d). 10% of the safe flow of the meter

Answer 57

a). 75% of the safe flow of the meter.

Question 58

4. What is the maximum acceptable velocity of the water flow through the copper service line? a). 10 fps b). 9 psi c). 9 fps d). 5 fps

Answer 58

c). 9 fps

Question 59

6. Evapotranspiration is a combination of a). Humidity and solar heat b). Evaporation and transpiration c). Solar radiation and wind d). Soil type and evaporation

Question 60

7. What is capillary action? a). The main effect distributing water vertically through the soil. b). The main effect distributing water through the piping. c). The main effect distributing chemicals in the soil. d). The main effect distributing water horizontally through the soil.

Answer 60

d). The main effect distributing water horizontally through the soil.

Question 61

9. Head spacing is calculated as a percentage of what? a). The area the head covers b). Diameter of the spray of a given head c). Radius of the spray of a given head d). Half of the radius of a given head

Answer 61

b). Diameter of the spray of a given head

Question 62

14. If you want the average precipitation rate for an area, which method would work? a). Single head method b). Triangular spacing method c). Specific area method d). Total area method

Answer 62

d). Total area method

Question 63

29. Diffusion of spray and rotary sprinkler heads should not exceed: a). 10 - 15% b). 5 – 10% c). 20 – 25% d). 25 – 30%

Answer 63

d). 25 – 30%

Question 64

31. Sprinkler heads on a slope should be installed: a). at a 25% angle. b). Vertical c). Perpendicular to the slope d). 1” below grade

Answer 64

c). Perpendicular to the slope

Question 65

32. How should you run integrated emitters on a sloped site? a). Parallel to the slope b). Perpendicular with the slope c). Diagonally across the slope d). None of the above

Answer 65

b). Perpendicular with the slop

Question 66

34. How can sprinkler heads be spaced? a). Up to 35 feet with rotary heads. b). Only 5-10% beyond the recommended spacing. c). Never beyond the maximum manufacturer’s recommended spacing at a specific pressure. d). None of the above

Answer 66

c). Never beyond the maximum manufacturer’s recommended spacing at a specific pressure.

Question 67

36. The service line would be defined as what? a). Piping from the city main to the water meter b). Piping from the backflow device to the zone valves c). Piping from the water meter to the backflow device d). A & C

Answer 67

d). A & C

Question 68

41. The maximum velocity in PVC and poly pipe (to prevent damaging pipe or other components of the irrigation system) should be? a). 9 FPS b). 7.5 FPS c). 5 FPS d). 5 – 7.5 FPS

Answer 68

c). 5 FPS

Question 69

42. What pipe has a recommended maximum velocity of 9 FPS? a). Schedule 40 PVC pipe b). Class pipe c). Poly pipe d). Copper pipe

Answer 69

d). Copper pipe

Question 70

45. What is the maximum FPS when sizing backflow units? a). 9 FPS b). 7.5 FPS c). 5 FPS d). 5 – 7.5 FPS

Answer 70

b). 7.5 FPS

Question 71

46. What is a general guideline for sizing zone valves? a). 3 - 7 PSI b). 3 – 5 PSI c). 5 – 9 FPS d). 2 – 5 PSI

Answer 71

d). 2 – 5 PSI

Question 72

Which of the following is not a basic principle of Xeriscaping? a. Mulching b. Efficient irrigation c. Sizing Components d. Proper Maintenance

Answer 72

c. Sizing Components

Question 73

Pressure compensating devices help save water because they. a. keep the water pressure high enough for good coverage b. compensates for the lack of a good design c. help eliminate misting or fogging at the sprinkler heads d. allow for fewer heads, thus less water used

Answer 73

c. help eliminate misting or fogging at the sprinkler heads

Question 73

A device which signals the automatic valves to open or close is called a : a. a Sprinkler key b. a quick coupler key c. a faucet handle d. a solenoid

Answer 73

b. a quick coupler key

Question 73

A drawling of an installed irrigation system showing major components is: a. called a record drawling or as built plan b. a corrected document for city use c. an irrigation documentation d. is required by all cities

Answer 73

a. called a record drawling or as built plan

Question 74

which device is used to keep debris from being sucked into the line? a. Flush valve b. pressure regulator c. air relief valve d. filter

Answer 74

c. air relief valve

Question 74

what type of valve would be installed to offer water to a remote location ? a. Ball valve b. Drain Valve c. Electric valve d. Check Valve e. Quick Coupler valve

Answer 74

e. Quick Coupler valve

Question 75

Witch Backflow device uses a pressure rdifferntial relif valve ? a. RPPA b. DCVA c. AVB d. PVB

Answer 75

a. RPPA

Question 76

What type of drip emitters is integrated into the pipping system from the manufacture ? a. single emitter unit b. bubbler unit c. integral emitter d. micro emitter e. pressure compensating emitter

Answer 76

c. integral emitter

Question 77

Schedual 40 PVC pipe has a higher pressure rating than class pvc pipe: a. in all sizes b. in the larger sizes c. except for class 200 d. in the smaller size up to 1 1/2"

Answer 77

d. in the smaller size up to 1 1/2"

Question 78

For an irrigation system to work, actual head pressure has to be: a. less than minimum head pressure b. equal to minim head pressure c. greater then minimum head pressure d equal to, or greater than minimum head pressure

Answer 78

d equal to, or greater than minimum head pressure

Question 79

What is the term used to represent water in motion? a. Running Water b. Pressurized Water c. Flow d. Dynamic Water

Answer 79

d. Dynamic Water

Question 80

The natural force exerted by water is a result of what? a. The weight of the water above the point of measurement b. A water Tower c. A pump d. A slope

Answer 80

a. The weight of the water above the point of measurement