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NLC WLE CH.1 Flashcards | StudBud
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NLC WLE CH.1
NLC WLE CH.1
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Answers
1
Electrical current takes _____ path available to objects of different potential
Path of least resistance
One
Every
Most
2
OSHA states that all employees exposed to electrical hazard must use?
EPP
Approved PPE
OPP
PPE
3
Gives permission for the clearance to occur and releases the line to the clearance holder so that the work can be done
Clearance holder
System operator
Field generator
Field operator
4
OSHA requires all devices used as a clearance point must be tagged.
True
False
5
What are some ways to isolate?
Use insulated platform
Stay in your bucket
Use insulated aerial lift
Create physical separation from any object of different potential
6
Even de-energized lines can become energized by unexpected or abnormal sources of energy?
False
True
7
You must stop linework in what conditions?
Rainey
Cloudy
Lightning
Stormy
8
Are gang operated, operated manually by hook or motor, operator must visually confirm contacts are open
Air switch
Open Jumper
Line recloser
Single blade disconnect(cutout)
9
What hazards may be present?
Trees
Step and touch potential
Second point of contact
Energized line
Equipment failure
10
Some are designed to interrupt normal line current, or required special tool to open?
Single blade disconnect(cutout)
Line recloser
Air switch
Open Jumper
11
A phenomenon where equipment retains a charge long after being disconnected, such as capacitors and underground cable
Capacitance
Energized
Grounded
Short circuit
12
What is the voltage difference between the workers 2 feet?
Touch potential
Leg potential
Step potential
Potential
13
Why do we ground?
To keep electricity flowing
Because OSHA says so
So the conductor doesn’t overheat and damage the integrity of the system
To be safe
14
Most electrical line work falls into what categories?
Repair
Maintenance
Construction
Cleaning
15
Any enclosed equipment that does not show the contacts are open.
Visual
Non-visual clearance point
Visual clearance point
Clarence point
16
Is responsible for accomplishing the work in the field.
System operator
Field operator
Field generator
Clearance holder
17
What are some sources of electrical energy aside from utility company?
Backfeed
Induced voltaeg(Induction)
Static charge
Capacitance
Lightning
Unexpected operation of device
18
Any device used to disconnect a line or piece of equipment from a normal source of energy.
Visual point
Clearance point
Clearpoint
Clarence point
19
Provides a clear, visual gap between the source and low terminals of device
Visual
Non-visual clearance point
Visual clearance point
Clarence point
20
How can you protect against second point of contact?
Arrange the insulation and isolate the workers and tools
Nothing can be done.
Link the insulation and tools to the worker.
21
OSHA says to wait five minutes before installing grounds or a disconnect on a?
Energized
Capacitance
Capacitor
Grounded
22
What hazards may be present in this image?
Capacitance
Ungrounded
Step potential
High voltage lines
23
What are two grounding procedures?
EPZ
Bracket grounding
Blanket grounding
PEZ
24
What are some ways to insulate?
Rubber gloves/sleeves
Rubber/plastic cover
Hot sticks
Clown shoes
25
The available fault current for a specific location on a specific circuit is based on.
The impedance of the system components
The size and type of generators
How far or close the work location is to the source
The size and type of the substation transformers
26
Is physically operating the apparatus or devices used to disconnect the lines/equipment b4 a clearance is issued
Field operator
System operator
Clearance holder
Field generator
27
What are 4 ways clearance objectives can be met ?
Properly inspect & apply protective grounding, bonding equip 4 employees
Follow proper procedures to clear the line, line section, or peace of equip
Ensure effective three-way communication between SO, FO, & CH.
Accurately identify line, line section, or piece of equip to be cleared
28
Disconnecting line, line section, or equipment that is being worked on.
Safety
Clearance
Clarence
Clear line
29
The amount of current that a given system can deliver in the event of a short circuit(fault).
Short circuit
Fault
Current
Fault current
30
This is a picture of?
Flying bells(In-line sectionalizer)
Air switch
Single blade disconnect(cutout)
Open Jumper
31
Used to trip out the circuit as quickly as possible?
Equipotential zone
EPZ
Bracket bonding
Bracket grounding
32
At what amperage does skin start to burn?
2 Amps
1/3 amp
3 AMPS
1 amp
33
Being trained and competent means you can?
Distinguished exposed live parts from other parts of electric equipment
Determining the nominal voltage of exposed live parts
Observe & maintain min approach distances go with voltages
Recognize electrical hazards, and knowing how to control or avoid them
Use special, precautionary techniques, PPE, and insulating tools & eqip
34
This is a picture of?
Air switch
Open Jumper
Line recloser
Single blade disconnect(cutout)
35
The point at which current leaves the body during simultaneous contact between 2 or more objects of different potential
Second point of contact
Contact point
First point of contact
Last point of contact
36
OSHA requires that ground cables not be smaller than?
2/0
5/0
4/0
1/0
37
A warm wind blowing across lines can cause a?
Capacitance
Static charge
Accidental energizing
Light
38
When performing energized you should follow what principles?
Relax
Insulate
Protect against second point of contact
Isolate
39
This is a picture of?
Line recloser
Air switch
Single blade disconnect(cutout)
Open Jumper
40
What is the voltage difference between the worker’s hand and the place they are standing?
Step potential
Leg potential
Potential
Touch potential
41
This type of work is performed when the line is operating at normal voltage aka hot?
Maintenance
Energized
New Construction
De-energized
42
What type of devices must be tagged?
Breaker switch
Physical switches
Remote-control switches
Light switch
43
Is responsible for creating the clearance plan and requesting clearance in writing.
Field operator
System operator
System holder
Clearance Holder
44
Is a piece of conductor used to complete an electrical circuit but it is open?
Open Jumper
Single blade disconnect(cutout)
Line recloser
Air switch
45
The point at which the line or equipment to be worked on is disconnected, tested, and grounded.
De-energized
Hot
Energized
Neutral
46
What are two ways workers can protect themselves against abnormal sources of energy?
Bonding
Cuddling
Grounding
Potential
47
This is a picture of?
Line recloser
Single blade disconnect(cutout)
Air switch
Open Jumper
48
The human body is an excellent conductor because?
Because we are climbing machines
It’s made of 50-70 percent water
Because of the iron in your blood
Our body is full of electrolytes
49
This is a picture of?
Open Jumper
Single blade disconnect(cutout)
Line recloser
Air switch
50
OSHA requires the employer to ensure that each qualified employee has demonstrated the ability to?
Is trained incompetent
Resolve problems related to the subject matter
Resolve problems related to the project
Resolve problems related to the work
51
Why are step and touch potential serious hazards?
If truck,ground,or eqpmnt bcme enrgized & you touch it you get fryed.
They are not dangerous
52
What are three major objectives when clearing lines and equipment?
Minimize the number of customers who will be out of service.
Minimize the negative impact on the electrical system.
Maximize the number of customers who will be out of service.
Ensure the safety of all employees and the public
53
What are some devices that can be used as clearance points?
Air switch
Single blade disconnect(cutout)
Open Jumper
Line recloser
54
What is this an example of?
EPZ
Working
Bracket grounding
Climbing
55
OSHA divides electrical work into what two categories?
Maintenance Industry
Construction Industry
General Industry
Repair Industry
56
What are the key things to consider when operating switches?
Double-check and verify the switch number.
Prepare to operate the switch in a rapid, continuous, positive manner
Understand what will happen when the switch is operated.
After operating switch, visually check all contact positions.
Inspect condition of the switch & supporting structure& always wear PPE
Notify system operator of any problems.
57
OSHA tags must be ?
Noticeable
Clearly prohibit the operation of the clearance points
Indicate that employees are at work on the cleared line or equipment
Clear, easy-to-read instructions
58
Protective grounding and bonding are effective if?
Limit the current flow and voltage drop across the line worker body
Minimize the time it takes to trip to circuit
Maxmize the time it takes to trip to circuit
Send current flow and voltage drop across the line worker body
59
OSHA requires vehicle barricades at all times to prevent unauthorized access to work area.
True
False
60
The clearance typically involves three rolls. What are they?
Field operator
System operator
Line operator
Clearance holder
61
How many amps does it take to put your heart into v-fib?
3
1/2
1/4
1/3
62
Safety is not a checkbox. It is a deeply held personal value an approach to life& work that is never compromised
True
False
63
What are the three common work processes for doing energized work?
Hot Gloving
Rubber gloving
Hot sticking
Barehanding
