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Irrigation > Final > Flashcards

Final Flashcards

1
Q

What is the “C Factor” or Coefficient of Friction?

A

Measurement of the roughness of the inside wall of the pipe. The C-factor is used to calculate friction loss in pipe.

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2
Q

For example…a pipe called a TBE Nipple is called this why? What is TBE?

A

Threads on Both Ends

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3
Q

What doe the TOE mean on a peice of pipe called a TOE Nipple?

A

Threaded on One End

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4
Q

What is the differnece between a Concentric Reducer and a Eccentric Reducer?

A
  • Concentric is a fitting with both ends on the same center line.
  • Eccentric is a fitting with one flat side and is used to prevent the entrapment of air in pump suction piping.
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5
Q

What does PVC stand for?

A

Poly-vinyl Chloride

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6
Q

The higher the schedule number the ________ the pipe.

A

Thicker

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7
Q

for PVC pipe….the pressure rating ________ as size increases.

A

decreases

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8
Q

What does SDR stand for?

A

Standard Dimention Ratio

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9
Q

In SDR Pipe, if you have a higher number, it means you have a _______ pressure rating.

A

Lower

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10
Q

What is the most common SDR pipe on golf courses?

A

SDR 21

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11
Q

Is PVC pipe UV resistant?

A

No, it will deteriorate when exposed to sunlight for a long period of time.

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12
Q

When applying primer…what are the first three steps for application?

A
  1. apply inside of fitting
  2. apply outside of pipe
  3. apply inside of fitting
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13
Q

How do you read measurements on a “T” ?

A

Run (across the top of the T)

then

Branch or **Bull **(perpendicular part of the T)

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14
Q

What is a Chamfer?

A

a Bevel

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15
Q

Fabricated epoxy coated steel pipes are susceptible to failure due to what?

A

Chipping and Erosion

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16
Q

when using PVC gasket joint fittings in a golf course setting, they should only be used in _________ sizes where potential for pressure surges is low.

A

smaller

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17
Q

When using Ductile Iron Fittings with corrosive soils & water supplies….what is the best choice?

A

Epoxy coated fittings

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18
Q

When using Push-on Fittings, what must you have?

A

Thrust Block or Restraint to prevent the fitting from blowing out.

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19
Q

Thrust Blocks must be constructed or poured in place to prevent fitting pull-out at:

A
  • all directional changes
  • whereever pipe sizes increase or decrease
  • at all dead ends
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20
Q

Joint Restraints can be used in conjunction with or in place of ____________.

A

Thrust blocks

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21
Q

Why would you want a gate valve on a wet well intake?

A

To access the wet well to clean up debris, fetch tools and inspect equipment.

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22
Q

What causes the stray electric current?

A

Electrolysis

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23
Q

How often do they reccomend you exercise your Resilient Wedge Gate Valve?

A

Semi-Annually

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24
Q

What are the problems with ball valves?

A
  • Water gets trapped and can freeze, causing failure
  • They are so easy to open and close quickly that you can create water hammer and ruin shit!
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25
Q

How do you prevent a ball valve from freezing?

A

leave it 1/2 open - 1/2 closed position

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26
Q

Where are Butterfly Valves typically used?

A

Pump Stations

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27
Q

Where would you want to install Air/Vaccum Release Valves?

A

At high points and dead ends

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28
Q

All zone valves should be ______ _______ due to the high pressures typically found on a golf course irrigation system.

A

pressure regulating

29
Q

A valve that uses a soleniod mechanism requires ______ electrical current to initially open than it does to stay open.

A

More

30
Q

What are the only things that can go wrong with a valve?

A
  1. valve wont open
  2. valve wont close
  3. valve weeps
31
Q

Straight, Non-Tapered thread connection is called:

A

ACME

32
Q

DWV means:

A

Drain Waste Vent

33
Q

What does FIPT mean?

A

Female iron pipe thread

34
Q

What does MIPT mean?

A

Male iron pipe thread

35
Q

What does NPT mean?

A

National pipe thread

36
Q

PVC gasket joint fittings should only be used with what size pipe on golf courses?

A

2 1/2” or smaller

37
Q

On a Latching Solenoid Operation…how much power is required to hold it open?

A

None.

38
Q

On a Latching Solenoid Operation …How is does it close?

A

It reverses the polarity

39
Q

No irrigation system can entirely eliminate:

A
  • pump station ramp up. - the “tailing off” effect.
40
Q

Weaher Stations are able to control Central Control Systems. True or False?

A

True

41
Q

What do weather stations consist of?

A

 Air Temperature and Humidity Sensor  Wind Speed and Direction Sensor  Rain Gauge  Pyranometer

42
Q

Where should you place your weather station?

A

The Weather Station should be located over open level terrain at least 30’ in diameter and at a distance of at least 10 times the height of any nearby building, tree or other obstruction. Stay at least 90 feet away from large paved areas.

43
Q

What are areas to avoid when installing your weather station?

A

Rooftops Steep Slopes Sheltered Hollows High Vegetation Shaded Areas Swamps Areas that hold standing water after rain

44
Q

Approximately _______ satellites provide world wide coverage

A

28

45
Q

What are the ways that HDPE fittings can be joined together?

A
  • Thermal Fusion
  • Socket Fusion
  • Electro Fusion
  • Mechanical
46
Q

The coefficient of thermal expansion for HDPE pipe is ____ times that of PVC pipe.

A

3

47
Q

When threading metal to plastic pipe, the metal fitting or valve should have ______ ends and the plastic fitting or nipple should be _____.

A

female

male

48
Q

Asbestos Cement Pipe is also called _______.

A

Transite Pipe

49
Q

When applying PVC cement, what steps do you take and when do you want to do it?

A
  • Outside, Inside, Outside
  • While the primer is still wet
50
Q

NEC stands for

A

National Electric Code

51
Q

UF stands for

A

Underground Feed

52
Q

AWG stands for

A

American Wire Guage

53
Q

in AWG the larger the number means:

A

the thinner the wire

54
Q

What do insulators do?

A

prevent or block the flow of electricity

55
Q

What product has better insulation…PVE or PE?

A

PE

56
Q

Green wire is for what?

A

Equipment Ground

57
Q

White wire is what?

A

Neutral or Grounded Conductor

58
Q

Black or Red wire is what?

A

Hot

59
Q

AC stands for

A

Alternating Current

60
Q

DC means

A

Direct Current

61
Q

VAC means

A

Volts Alternating Current

62
Q

What do Ohms measure?

A

Resistance

63
Q

What do Amps measure?

A

Current

64
Q

What do Volts measure?

A

electrical pressure

65
Q

Only 3 items that can go wrong electrically
listed in order of trouble shooting sequence

A

– 1.) Satellite / Field Controller
– 2.) Field Wiring
– 3.) Solenoid

66
Q

The transformers outgoing voltage should be between:

A

23 to 28 VAC

67
Q

Normal voltage of a solenoid is how many volts?

A

24

68
Q

Force = ?

A

Pressure x Area

Irrigation (1 decks)

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