Test 3-2 Flashcards
The IBEW electrical construction industry is known as the ? Industry.
C) strikeless
The ? System is used when an informed neutral party analyze the conditions and through persuasion bring the parties together.
C) mediation
Labor, peace and better conditions for all Can be a result when ? Is exercise in negotiation.
C) Goodfaith
Bodily injury is a result of the current level and ?.
C) Duration of the current flow
Body current will flow inside the body when ?.
D) Voltage punctures the skin
Low levels of current flowing through the body for an extended period of time can result in ?.
A) Fibrillation
If the voltage and resistance of a circuit is known what formula can be use to find current flow. ?
A) v/r=I
The primary characteristics of a ? Circuit is that it has multiple paths of current flow.
B) Parallel
?
?
worker making contact with 4160 volts and with a body resistance of 700 ohms will have __?__ amperes of current passing through his or her body.(Round-up)
C) 9
Most historical approaches to personal protective grounds were__?__.
B) not effective
- When using separate grounding connections to earth__?__
B) current will still flow through the workers body
he great myth about grounding is a connection to earth __?__
B) is a connection to 0 volts.
- An equipotential zone works by placing a ? In parallel with the worker.
C) low resistive shun
?
D) voltage
The equipotential zone ground cable in a ? When it’s part of the bracket scheme.
C) personal protective jumper
When an electrical worker is working in a equipotential zone a Pole ground ?
A) Has little effect on current that passes through his/her body.
A ground should be sized to carry ? Current as long as the circuit is energized.
C) fault
A ? Provides stress relief for grounding cable.
A) cable ferrule
In placement of grounds , Knowledge of a ? helps the worker understand his/her place in the Circuitry.
A) Basic circuits
If grounds are_?_ the safety of worker is in jeopardy.
A) installed in the incorrect order
The first step when installing grounds is to ?
D) Test the line for the absence of voltage.
A low resistance source path is the ?
A) neutral conductor
When ? flows through a conductor a voltage drop across the conductor develops.
B) current
Under fault conditions as a worker gets closer to the connection point where the ground rod is driven a difference of potential will occur between the workers and ?
A) Feet/Feet
One way for a worker to protect himself is to create an equipotential zone using a_?_
D) portable ground mat
The voltage drops across the earth decreases about ? For every 2 - 3 feet away from the earth connection point.
D) 50%
A de-energized and insulated line may be charged with _?_Without current flow.
C) induced voltage
During accidental energization of equipment ? Fault current will flow.
a) large
A ? can be induced by wind.
a) static charge
Induce current accidents are common because of the use of ?
d) multiple grounds
A driven ground rod may help a ___ but provides ? For the workers around the truck
c) no protection
During Maintanance work a ? ground between the truck, the line and a driven ground rod should be used.
a) common
The ? Of the worker is the key to safety.
B) focus
When the worker contacts the conductor for splicing, the ? No longer offers protection.
C) portable ground mat
By using a ground mat, a ? can be created around pad – Mount switches and transformers
C) equipotential zone
A good rule for URD work is: Do not depend on __?__.
a) __existing cable tagging
b) __ What you can’t see
c) __ what you think you know d)x all the above
Large fault current levels in substations require (s).
b) large clamps and cables
major construction ___ ____ _____
a) higher fault current levels
Close spacing between energize conductors and de-energized equipment creates
c) induced voltages and currents
Personal protective grounding during construction activities become hazardous on the worksite because_?_
A) __more workers are present
B)__ more vehicles increase
C) __workers are often working near energized lines
D)x all the above
While working around vehicles and equipment, grounding mats are preferred over rubber gloves and insulating items because ?.
D) the voltage can exceed the rating of insulating items.
The touch potential hazard increases around a ? That become energized.
a) __ pole
b) __ tower
c) __ vehicle
d) x all the above
The type of soil and ? influences the resistance of the earth.
a) moisture content of the soil
The earth’s ground Resistance increases when ?
a) the moisture in the earth decreases
The national electrical code require that a ground rod shouldnt have less than_?_ ohms resistive
c) 25
Lightning Can be_?_Of volts.
c) millions
The ? Housing of a lightning arrestor reduces the damaging effects in case of a failure.
d) polymer
The metal-oxide arrestor does not have ? between the valves.
a) gaps
A dead front lightning arrestor is used in_?_
C) Underground distribution
