WGL Flashcards
(128 cards)
1
Q
Your line marks must be atleast?
A
Within 2’ on either side of the line your marking
2
Q
We use what items to mark ?
A
Paint, Stakes and Flags or a Combination of them
3
Q
What is the most important reason for on time pipe locating?
A
Public Safety
4
Q
Reasons for locating
A
Damage Prevention, Long range planning, Maintenance, Map Verification & updating, and Planning for expansion or replacement
5
Q
Before you locate you must perform a ?
A
Site Survey
6
Q
Commons ways to locate are?
A
Maps, Electronic Locators, Hand Digging an Visual Inspection
7
Q
Pipeline markers must have what info?
A
Name of the Operator and Number they can be reached 24 hours a Day
8
Q
Pipelines with a Black Ban are considered
A
Offsets
9
Q
Pipeline markers are set by
A
Line of site
10
Q
Instead of 8khz you would instead use
A
Lowest workable frequency
11
Q
Electric current follows what type of path
A
The path of least resistance
12
Q
3 ways we locate
A
Conductive(Direct Connect)
Close Induction(Ring Clamp)
Induction(Indirect method or Drop Box)
13
Q
Frequency Means?
A
How often something happens over a fixed period of time
14
Q
Electricity uses what type of current
A
Ac or Alternating current
15
Q
Low frequency range
A
100hz - 1Khz
16
Q
Medium frequency range
A
8khz - 33khz
17
Q
High frequency range
A
65khz and up
18
Q
for Maximum response
A
Peak Mode
19
Q
Minimum response
A
Null Mode
20
Q
Maximum efficiency is achieved when?
A
The Transmitter and receiver are vertical and parallel to the buried pipe
21
Q
The trace method is also known as
A
Active locating
22
Q
The search method is also known as
A
Passive locating
23
Q
The depth determination method is also called
A
Triangulation method (45 degree angle)
24
Q
Dead end branch or Stub Ends sometimes called
A
Dead end cap
25
Riser valve alternative name
Insulated shutoff valve
26
The signal indicated by the locators receiver is and electric current generated from a magnetic field to the
Antenna made of copper coils
27
Attenuation is
Signal Loss
Bleed off or Bleed over
Coupling
28
Dry, Sandy, Loosely packed soil is
Will not conduct well
29
Damp(Moist), Closely packed soil is
Perfect for locating and will conduct well
30
Extremely damp or wet soil
Will conduct to well and will spread into the large ground bed
31
This occurs when the signal resonates between two conductors and causes a false reading
Ghost Signal
32
A mode of operating the pipe locator that ensure the signal does not jump to the other conductor is
Conductive Mode or Direct Connect
33
In high traffic ares we use what to mark
Flags or Paint Dots(Spot Marking)
34
Your marks must not exceed ___ Ft between them
20 Feet
35
Your marks should be
8" to 10" Long
| 1" to 2" Wide
36
You must make a minimum of ___ marks for each utility
3 marks per utility
37
WG considered High profile pipes to be
12" and above
38
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
True
39
Abandon line response time is
27 Hours
40
How many hours to do a mark
48 Hours
41
A ticket is valid for?
15 days starting 7am the following Morning
42
Service regulator vents and relief vents must be
Rain and Insect resistant
| And must be vented to the outside atmosphere
43
Your depths are ?
12" on private property
18" on streets and roads
30" for transmission line in normal soil
18" in consolidated rock
44
Mobile homes must have
adequate support or commonly a rigid 4x4 Post
45
Aoc's to Consider are
SoS - Structure over Service
Exposed yellow piping
Missing plugs or Caps
46
The regulator vent or vent outlet must be at least ____ Ft horizontally away from any powered intake vents
10 Feet
47
A tape measure in the picture usually means
That the object is too close to and opening or source
48
On shore meter inspection must be done
Every 3 years never to exceed 39 months
49
Vehicle safety posts or protection posts must be
No more than 4' apart
At least 3' tall
No closer than 12" to the meter
No more than 3' away
50
Aoc's that require documentation and notifications
```
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
```
51
Fusion bonded epoxy is applied
Electrostatically
52
When use see a flap of plastic damage it is considered a?
Gouge
53
When you see a mercury vapor meter do what?
Call your supervisor or appropriate company personnel
54
Pitting an Dents commonly occur on what type of pipe
Bare Steel
55
Coating defects and Dents commonly occur on any?
Coated Steel
56
Gouges, nicks and scratches
Plastic
57
The farther you get from your transmitter your signal should do what?
Decrease
58
When a signal target jumps to an adjacent line without a direct connect, it is known as?
Bleed over or Bleed off
59
An operator must respond to an emergency ticket in how many hours?
3 Hours
60
Which would be the best conductor for a buried pipe or cable?
Coated tracer wire
61
Cathodic protection test stations are often associated with this type of main?
Wrapped Steel Main
62
Which signal would travel the furthest?
8khz
33khz
480khz
64khz
63
Which signal would travel the shortest distance?
1hz
65khz
480khz
8khz
64
You should look for ___ during visual pipe inspection?
Leaks, Gouges an Pipe deformations
65
When looking at exposed pipe you should document what 3 things?
Pipe Size, Pipe Type and Pipe Coating
66
What are metal answers
Coating defects, Weld defects an Mechanical damage
67
When checking PL lines you should be aware of what 5 things?
Scratches, Nicks, Gouges, Punctures and Incomplete fusion joints
68
Inspect bare steel for?
Pitting and Dents
69
Inspect coated steel for?
Coating defects and Dents
70
Coupling is?
When signal attach to lines in which they were not originally applied
71
The signal on a conductor radiates in what type of circles?
Concentric circles
72
A typical gas meter consists of what 7 parts?
```
Regulator
Regulator Vent
Insulated shutoff valve
Meter
Swivel nut
union
meter bar
```
73
Atmospheric corrosion is also called
Rust
74
Abnormal meter operation/ Conditions may include
Unusual meter sound(meter is operating abnormally)
Rapid dial movements(Gas flow is rapid)
Major leak downstream
75
Causes for immediate communication or action on meters
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
If a line was found to be abandoned, what must the operator do?
Record the location of the abandoned line in the company prints
77
Small diameter pipes works best with?
Low frequencies because the size allows the signal to flow with less signal loss
78
Large diameter pipes have greater surface contact with the soil therefore?
Increasing signal loss to the signal
79
An operator or contractor must respond to an emergency locate requests within?
3 hours of the excavator contacting the one call center
80
High frequencies may and are?
```
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
A Circuit is completed when?
There is a return path to ground
82
Sources of ignition in the home
Doorbell
Pilot Lights
Light switches
Static Electricity
83
Back fill must be free of what?
All Debris and rocks
84
Chipped paint is considered a?
Coating defect
85
Purple
Slurry lines
Irrigation
Reclaimed Water
86
Red
Electric
87
Blue
Water
88
Yellow
Gas
89
Green
Sewage
90
White
Proposed excavation
91
Pink
Temporary survey marks
92
Orange
Tele Communications
93
What do you do in the case of a Gas leak
Evacuate , Eliminate the source of ignition , Ventilate
94
Passive means
The current is already present
95
Active Locating means
We apply the signal
96
PL
Plastic
97
W/STL
Wrapped Steel
98
Mobile homes more commonly use Flexible piping and therefore the meter must be
Adequately support by a rigid post
99
What affects your signal
Everything
100
Acceptable connection locations are
Valves, pipes, tracer wire, test pipes, inlet side of gas meter test station
101
Where can you find out more about miss utility
The excavators manual
102
Miss utility Number
811
103
The ability for current or charge to jump across an insulating barrier, like the jacket of an electric cable is known as?
Capacitance
104
What is the best way to determine if you are receiving a ghost signal
Move the receiver towards the signal and it should disappear
105
The area adjacent to a broken line with escaping gas is known as
The Hot Zone
106
4 types of pipes most commonly seen are?
Cast iron, coated steel, bare steel and plastic
107
A pipe with a bell joint is
Cast Iron
108
When signal attaches to lines to which they were not originally applied is known as?
Coupling
109
The lower the frequency
The further the signal carries
110
Liquid epoxy is applied by
Spraying
111
What should you do with disbonded coating
Remove and Clean(recoat)
112
form of documentation
Who, What, When, Where and Why
113
The Manifest(Ticket) must have
Locators name
114
Lines in consolidated rock must be
18"
115
Cold applied tape
Wrapped Steel
116
which antenna gives null response
vertical
117
which antenna gives peak response
horizontal
118
What gives depth
2 horizontal antenna
119
Bonded devices are required in all situations where there may be a source of ignition such as
static electricity
an induced electrical charge
a ground fault
120
Exposed plastic piping considered
An Aoc and you must document
121
Sources of ignition on jobs sites include
Open flames, generators, power tools, motor vehicles
122
Meters and Regulator vents must be a minimum of ____
3 Feet from sources ignition and building openings
123
If a meter is indoors it must be
3 Ft away ignition sources and ventilated to the outside
124
Whats size fire extinguisher ?
20lb
125
True or False
| The venting of gas may be required for some escaping gas situations to reduce mainline pressure
True
126
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
True
127
All battery operated equipment can be considered as intrinsically safe and should not be considered as a potential source of ignition
False
128
Frequency is measured in
Hertz
