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2 Flashcards

1
Q

The IBEW electrical construction industry is known as the ? Industry.

A

C) strikeless

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2
Q

The ? System is used when an informed neutral party analyze the conditions and through persuasion bring the parties together.

A

C) mediation

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3
Q

Labor, peace and better conditions for all Can be a result when ? Is exercise in negotiation.

A

C) Goodfaith

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4
Q

Bodily injury is a result of the current level and ?.

A

C) Duration of the current flow

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5
Q

Body current will flow inside the body when ?.

A

D) Voltage punctures the skin

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6
Q

Low levels of current flowing through the body for an extended period of time can result in ?.

A

A) Fibrillation

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7
Q

If the voltage and resistance of a circuit is known what formula can be use to find current flow. ?

A

A) v/r=I

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8
Q

The primary characteristics of a ? Circuit is that it has multiple paths of current flow.

A

B) Parallel

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9
Q

?

A

?

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10
Q

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)

A

C) 9

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11
Q

Most historical approaches to personal protective grounds were__?__.

A

B) not effective

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12
Q
  1. When using separate grounding connections to earth__?__
A

B) current will still flow through the workers body

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13
Q

he great myth about grounding is a connection to earth __?__

A

B) is a connection to 0 volts.

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14
Q
  1. An equipotential zone works by placing a ? In parallel with the worker.
A

C) low resistive shun

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15
Q

?

A

D) voltage

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16
Q

The equipotential zone ground cable in a ? When it’s part of the bracket scheme.

A

C) personal protective jumper

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17
Q

When an electrical worker is working in a equipotential zone a Pole ground ?

A

A) Has little effect on current that passes through his/her body.

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18
Q

A ground should be sized to carry ? Current as long as the circuit is energized.

A

C) fault

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19
Q

A ? Provides stress relief for grounding cable.

A

A) cable ferrule

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20
Q

In placement of grounds , Knowledge of a ? helps the worker understand his/her place in the Circuitry.

A

A) Basic circuits

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21
Q

If grounds are_?_ the safety of worker is in jeopardy.

A

A) installed in the incorrect order

22
Q

The first step when installing grounds is to ?

A

D) Test the line for the absence of voltage.

23
Q

A low resistance source path is the ?

A

A) neutral conductor

24
Q

When ? flows through a conductor a voltage drop across the conductor develops.

A

B) current

25
Q

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

A) Feet/Feet

26
Q

One way for a worker to protect himself is to create an equipotential zone using a_?_

A

D) portable ground mat

27
Q

The voltage drops across the earth decreases about ? For every 2 - 3 feet away from the earth connection point.

A

D) 50%

28
Q

A de-energized and insulated line may be charged with _?_Without current flow.

A

C) induced voltage

29
Q

During accidental energization of equipment ? Fault current will flow.

A

a) large

30
Q

A ? can be induced by wind.

A

a) static charge

31
Q

Induce current accidents are common because of the use of ?

A

d) multiple grounds

32
Q

A driven ground rod may help a ___ but provides ? For the workers around the truck

A

c) no protection

33
Q

During Maintanance work a ? ground between the truck, the line and a driven ground rod should be used.

A

a) common

34
Q

The ? Of the worker is the key to safety.

A

B) focus

35
Q

When the worker contacts the conductor for splicing, the ? No longer offers protection.

A

C) portable ground mat

36
Q

By using a ground mat, a ? can be created around pad – Mount switches and transformers

A

C) equipotential zone

37
Q

A good rule for URD work is: Do not depend on __?__.

A

a) __existing cable tagging
b) __ What you can’t see
c) __ what you think you know d)x all the above

38
Q

Large fault current levels in substations require (s).

A

b) large clamps and cables

39
Q

major construction ___ ____ _____

A

a) higher fault current levels

40
Q

Close spacing between energize conductors and de-energized equipment creates

A

c) induced voltages and currents

41
Q

Personal protective grounding during construction activities become hazardous on the worksite because_?_

A

A) __more workers are present
B)__ more vehicles increase
C) __workers are often working near energized lines
D)x all the above

42
Q

While working around vehicles and equipment, grounding mats are preferred over rubber gloves and insulating items because ?.

A

D) the voltage can exceed the rating of insulating items.

43
Q

The touch potential hazard increases around a ? That become energized.

A

a) __ pole
b) __ tower
c) __ vehicle
d) x all the above

44
Q

The type of soil and ? influences the resistance of the earth.

A

a) moisture content of the soil

45
Q

The earth’s ground Resistance increases when ?

A

a) the moisture in the earth decreases

46
Q

The national electrical code require that a ground rod shouldnt have less than_?_ ohms resistive

A

c) 25

47
Q

Lightning Can be_?_Of volts.

A

c) millions

48
Q

The ? Housing of a lightning arrestor reduces the damaging effects in case of a failure.

A

d) polymer

49
Q

The metal-oxide arrestor does not have ? between the valves.

A

a) gaps

50
Q

A dead front lightning arrestor is used in_?_

A

C) Underground distribution

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