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WGL Flashcards

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1
Q

Your line marks must be atleast?

A

Within 2’ on either side of the line your marking

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2
Q

We use what items to mark ?

A

Paint, Stakes and Flags or a Combination of them

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3
Q

What is the most important reason for on time pipe locating?

A

Public Safety

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4
Q

Reasons for locating

A

Damage Prevention, Long range planning, Maintenance, Map Verification & updating, and Planning for expansion or replacement

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5
Q

Before you locate you must perform a ?

A

Site Survey

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6
Q

Commons ways to locate are?

A

Maps, Electronic Locators, Hand Digging an Visual Inspection

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7
Q

Pipeline markers must have what info?

A

Name of the Operator and Number they can be reached 24 hours a Day

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8
Q

Pipelines with a Black Ban are considered

A

Offsets

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9
Q

Pipeline markers are set by

A

Line of site

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10
Q

Instead of 8khz you would instead use

A

Lowest workable frequency

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11
Q

Electric current follows what type of path

A

The path of least resistance

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12
Q

3 ways we locate

A

Conductive(Direct Connect)
Close Induction(Ring Clamp)
Induction(Indirect method or Drop Box)

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13
Q

Frequency Means?

A

How often something happens over a fixed period of time

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14
Q

Electricity uses what type of current

A

Ac or Alternating current

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15
Q

Low frequency range

A

100hz - 1Khz

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16
Q

Medium frequency range

A

8khz - 33khz

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17
Q

High frequency range

A

65khz and up

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18
Q

for Maximum response

A

Peak Mode

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19
Q

Minimum response

A

Null Mode

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20
Q

Maximum efficiency is achieved when?

A

The Transmitter and receiver are vertical and parallel to the buried pipe

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21
Q

The trace method is also known as

A

Active locating

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22
Q

The search method is also known as

A

Passive locating

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23
Q

The depth determination method is also called

A

Triangulation method (45 degree angle)

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24
Q

Dead end branch or Stub Ends sometimes called

A

Dead end cap

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25
Q

Riser valve alternative name

A

Insulated shutoff valve

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26
Q

The signal indicated by the locators receiver is and electric current generated from a magnetic field to the

A

Antenna made of copper coils

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27
Q

Attenuation is

A

Signal Loss
Bleed off or Bleed over
Coupling

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28
Q

Dry, Sandy, Loosely packed soil is

A

Will not conduct well

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29
Q

Damp(Moist), Closely packed soil is

A

Perfect for locating and will conduct well

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30
Q

Extremely damp or wet soil

A

Will conduct to well and will spread into the large ground bed

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31
Q

This occurs when the signal resonates between two conductors and causes a false reading

A

Ghost Signal

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32
Q

A mode of operating the pipe locator that ensure the signal does not jump to the other conductor is

A

Conductive Mode or Direct Connect

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33
Q

In high traffic ares we use what to mark

A

Flags or Paint Dots(Spot Marking)

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34
Q

Your marks must not exceed ___ Ft between them

A

20 Feet

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35
Q

Your marks should be

A

8” to 10” Long

1” to 2” Wide

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36
Q

You must make a minimum of ___ marks for each utility

A

3 marks per utility

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37
Q

WG considered High profile pipes to be

A

12” and above

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38
Q

True or False
Markings of an underground pipeline greater than 12” in nominal outside dimension shall include the size in inches at every other mark

A

True

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39
Q

Abandon line response time is

A

27 Hours

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40
Q

How many hours to do a mark

A

48 Hours

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41
Q

A ticket is valid for?

A

15 days starting 7am the following Morning

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42
Q

Service regulator vents and relief vents must be

A

Rain and Insect resistant

And must be vented to the outside atmosphere

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43
Q

Your depths are ?

A

12” on private property
18” on streets and roads
30” for transmission line in normal soil
18” in consolidated rock

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44
Q

Mobile homes must have

A

adequate support or commonly a rigid 4x4 Post

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45
Q

Aoc’s to Consider are

A

SoS - Structure over Service
Exposed yellow piping
Missing plugs or Caps

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46
Q

The regulator vent or vent outlet must be at least ____ Ft horizontally away from any powered intake vents

A

10 Feet

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47
Q

A tape measure in the picture usually means

A

That the object is too close to and opening or source

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48
Q

On shore meter inspection must be done

A

Every 3 years never to exceed 39 months

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49
Q

Vehicle safety posts or protection posts must be

A

No more than 4’ apart
At least 3’ tall
No closer than 12” to the meter
No more than 3’ away

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50
Q

Aoc’s that require documentation and notifications

A 
Unplanned buried facility
Meters installed in unventilated areas
Stress or Damage on Customer own piping
Corroded customer piping
Tree stress and facility damage
Insulated shutoff valve not fully open
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51
Q

Fusion bonded epoxy is applied

A

Electrostatically

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52
Q

When use see a flap of plastic damage it is considered a?

A

Gouge

53
Q

When you see a mercury vapor meter do what?

A

Call your supervisor or appropriate company personnel

54
Q

Pitting an Dents commonly occur on what type of pipe

A

Bare Steel

55
Q

Coating defects and Dents commonly occur on any?

A

Coated Steel

56
Q

Gouges, nicks and scratches

A

Plastic

57
Q

The farther you get from your transmitter your signal should do what?

A

Decrease

58
Q

When a signal target jumps to an adjacent line without a direct connect, it is known as?

A

Bleed over or Bleed off

59
Q

An operator must respond to an emergency ticket in how many hours?

A

3 Hours

60
Q

Which would be the best conductor for a buried pipe or cable?

A

Coated tracer wire

61
Q

Cathodic protection test stations are often associated with this type of main?

A

Wrapped Steel Main

62
Q

Which signal would travel the furthest?

A

8khz
33khz
480khz
64khz

63
Q

Which signal would travel the shortest distance?

A

1hz
65khz
480khz
8khz

64
Q

You should look for ___ during visual pipe inspection?

A

Leaks, Gouges an Pipe deformations

65
Q

When looking at exposed pipe you should document what 3 things?

A

Pipe Size, Pipe Type and Pipe Coating

66
Q

What are metal answers

A

Coating defects, Weld defects an Mechanical damage

67
Q

When checking PL lines you should be aware of what 5 things?

A

Scratches, Nicks, Gouges, Punctures and Incomplete fusion joints

68
Q

Inspect bare steel for?

A

Pitting and Dents

69
Q

Inspect coated steel for?

A

Coating defects and Dents

70
Q

Coupling is?

A

When signal attach to lines in which they were not originally applied

71
Q

The signal on a conductor radiates in what type of circles?

A

Concentric circles

72
Q

A typical gas meter consists of what 7 parts?

A 
Regulator
Regulator Vent
Insulated shutoff valve
Meter
Swivel nut
union
meter bar
73
Q

Atmospheric corrosion is also called

A

Rust

74
Q

Abnormal meter operation/ Conditions may include

A

Unusual meter sound(meter is operating abnormally)
Rapid dial movements(Gas flow is rapid)
Major leak downstream

75
Q

Causes for immediate communication or action on meters

A

Regulator vent is discharging inside the home
Rapid meter dial movement
Insulated shutoff valve is 75% closed
Vent is blocked
Leaking customer pipes
any aoc that results in a hazardous condition

76
Q

If a line was found to be abandoned, what must the operator do?

A

Record the location of the abandoned line in the company prints

77
Q

Small diameter pipes works best with?

A

Low frequencies because the size allows the signal to flow with less signal loss

78
Q

Large diameter pipes have greater surface contact with the soil therefore?

A

Increasing signal loss to the signal

79
Q

An operator or contractor must respond to an emergency locate requests within?

A

3 hours of the excavator contacting the one call center

80
Q

High frequencies may and are?

A 
More likely to bleed over
More likely to cause signal distortion
Don't travel very far 
Can be easy to find
May be able to overcome ever signal resistance
81
Q

A Circuit is completed when?

A

There is a return path to ground

82
Q

Sources of ignition in the home

A

Doorbell
Pilot Lights
Light switches
Static Electricity

83
Q

Back fill must be free of what?

A

All Debris and rocks

84
Q

Chipped paint is considered a?

A

Coating defect

85
Q

Purple

A

Slurry lines
Irrigation
Reclaimed Water

86
Q

Red

A

Electric

87
Q

Blue

A

Water

88
Q

Yellow

A

Gas

89
Q

Green

A

Sewage

90
Q

White

A

Proposed excavation

91
Q

Pink

A

Temporary survey marks

92
Q

Orange

A

Tele Communications

93
Q

What do you do in the case of a Gas leak

A

Evacuate , Eliminate the source of ignition , Ventilate

94
Q

Passive means

A

The current is already present

95
Q

Active Locating means

A

We apply the signal

96
Q

PL

A

Plastic

97
Q

W/STL

A

Wrapped Steel

98
Q

Mobile homes more commonly use Flexible piping and therefore the meter must be

A

Adequately support by a rigid post

99
Q

What affects your signal

A

Everything

100
Q

Acceptable connection locations are

A

Valves, pipes, tracer wire, test pipes, inlet side of gas meter test station

101
Q

Where can you find out more about miss utility

A

The excavators manual

102
Q

Miss utility Number

A

811

103
Q

The ability for current or charge to jump across an insulating barrier, like the jacket of an electric cable is known as?

A

Capacitance

104
Q

What is the best way to determine if you are receiving a ghost signal

A

Move the receiver towards the signal and it should disappear

105
Q

The area adjacent to a broken line with escaping gas is known as

A

The Hot Zone

106
Q

4 types of pipes most commonly seen are?

A

Cast iron, coated steel, bare steel and plastic

107
Q

A pipe with a bell joint is

A

Cast Iron

108
Q

When signal attaches to lines to which they were not originally applied is known as?

A

Coupling

109
Q

The lower the frequency

A

The further the signal carries

110
Q

Liquid epoxy is applied by

A

Spraying

111
Q

What should you do with disbonded coating

A

Remove and Clean(recoat)

112
Q

form of documentation

A

Who, What, When, Where and Why

113
Q

The Manifest(Ticket) must have

A

Locators name

114
Q

Lines in consolidated rock must be

A

18”

115
Q

Cold applied tape

A

Wrapped Steel

116
Q

which antenna gives null response

A

vertical

117
Q

which antenna gives peak response

A

horizontal

118
Q

What gives depth

A

2 horizontal antenna

119
Q

Bonded devices are required in all situations where there may be a source of ignition such as

A

static electricity
an induced electrical charge
a ground fault

120
Q

Exposed plastic piping considered

A

An Aoc and you must document

121
Q

Sources of ignition on jobs sites include

A

Open flames, generators, power tools, motor vehicles

122
Q

Meters and Regulator vents must be a minimum of ____

A

3 Feet from sources ignition and building openings

123
Q

If a meter is indoors it must be

A

3 Ft away ignition sources and ventilated to the outside

124
Q

Whats size fire extinguisher ?

A

20lb

125
Q

True or False

The venting of gas may be required for some escaping gas situations to reduce mainline pressure

A

True

126
Q

True or False
Keep hands an work tools away from the openings of pipe where gas is escaping to avoid static electricity discharge from the pipe surface

A

True

127
Q

All battery operated equipment can be considered as intrinsically safe and should not be considered as a potential source of ignition

A

False

128
Q

Frequency is measured in

A

Hertz

washington gas 101 (1 decks)

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