Step 5

Question 1

You are in the process of phasing two circuits, what is the first thing that should be checked?

Answer 1

Energized lines and a working phasing set.

Question 2

The hands of a clock travels from 3:00 to 9:00 the hands has traveled how many degrees?

Answer 2

180 degrees

Question 3

During a tailboard briefing a “no test”will be ______ prior to rubber gloving above7,500 volts

Answer 3

discussed

Question 4

What voltage listed below are a delta connection?

Answer 4

120/240 single phase

240 three phase

Question 5

What is a common neutral? Explain.

Answer 5

Its a Neutral conductor that is shared by primary and secondary

Question 6

The ideal circumstance for trying circuits together is to have_______ across the disconnects

Answer 6

No voltage

Question 7

The most important step in cable termination is

Answer 7

the restoration of the insulating system

Question 8

Service wires must extend at least ___ inches from the weather head.

Answer 8

36

Question 9

What is the purpose of a switched capacitor bank?and a fixed capacitor

Answer 9

increases power factor and reduces lagging components

switch banks can be taken in and out of service and fixed can not

Question 10

Which of the following actions will cause a decreases in the amount of voltage drop in a circuit?

Answer 10

Increasing the size of the conductors

Question 11

A megger is used to measure?

Answer 11

High resistance

Question 12

What does G.O. 95 stand for?

Answer 12

California state overhead construction rules

Question 13

The worker is “insulated” by using?

Answer 13

rubber gloves or rubber goods

Question 14

The worker is “isolated” by using?

Answer 14

bucket truck or isolated platform

Question 15

The scale on a set of blueprints is 1/8 inch equals 100 feet, how many feet would 3-3/4 inches be on the blueprint.

Answer 15

38=24
3/4=6/8 32=6 42=8
24+6=30
30100=(3,000)

Question 16

A distribution transformer should be _____ before changing taps.

Answer 16

De-energized

Question 17

According to OHM’s law, voltage is equal to ___?

Answer 17

current * resistance

I*R

Question 18

Explain how you check & record rotation an a three phase service?

Answer 18

check with rotation meter and use phase tape to mark the phases or mark them 123

Question 19

What is known as High,Wild,Stinger, or Power Leg

Answer 19

A leg of 4 wires that has voltage of 208/277

Question 20

List the 6 Steps or parts of a tailboard

Answer 20

1) Purpose of the job
2) My Job
3) Others Job
4) Foreman’s method
5) Hazards of the job and how to overcome them
6) Location

Question 21

Can you work bonding on 54.5 KV circuit with rubber gloves____?

Answer 21

No

Question 22

List 3 conditions that would cause induced voltage on a line

Answer 22

1) Power lines
2) Lightning strikes
3) Wind static

Question 23

The part of underground cable the equalized stress on the insulation is known as the________.

Answer 23

Semi-Conductor

Question 24

Explain why is electrical power transmitted at high voltage?

Answer 24

The higher the voltage the lower the line lose

Question 25

What two types of transformers are used for primary metering?

Answer 25

First- Current Transformer | Second- Power Transformer

Question 26

you are going to use a mac on a single phase line to cut in a deadend before using the jumper it should be inspected. List 3 items you would check

Answer 26

1) Head is tight 2) Insulation is in good shape no cracks or cuts 3) Mac is big enough to to handle the amp

Question 27

Your doing a transformer change out from a 25KVA to a 50KVA single phase, what will you do with the secondary leads before removing the old transformer?

Answer 27

Disconnect the secondary leads to eliminate back feed and mark your leads

Question 28

What is the minimum distance a secondary service must clear a phone cable in the middle of a span in California?

Answer 28

24"

Question 29

Explain how to test a transformer for polarity

Answer 29

put a jumper h1 and x1 put meter h1 and x4 or furthest to the right and apply 120 to h1 and h2 and if the voltage is higher than applied voltage it is additive and if the voltage is lower than the applied voltage it is subtractive

Question 30

The primary purpose of the National Electrical Safety Code is________

Answer 30

to provide safety to the public and electrical workers

Question 31

List the classes of burns

Answer 31

1st degree- redness swollen sunburn 2nd degree- swollen blistered watery 3rd degree- black and white charred

Question 32

What is the minimum working diastase above 15KVA below 15KVA

Answer 32

Above 15 KVA- 2ft 4in | Below 15KVA - 2ft 1in

Question 33

What does N.E.C.A. stand for

Answer 33

National Electrical Contractors Association

Question 34

Hot hoist or strap are electrically rated and tested for how many volts?

Answer 34

zero

Question 35

What is the phase to phase voltage of a 12,460 volt feeder?

Answer 35

12,460

Question 36

Can we use a 4,160 volt rated transformer on a 7,200 volt line?

Answer 36

yes

Question 37

Rubber gloves shall be given the ________ at least once a day while in use.

Answer 37

Air and water test

Question 38

According to OSHA fiberglass rein forced plastic live line tools shall be tested at _______ volts per foot for 5 minutes

Answer 38

100,000

Question 39

You must wear rubber gloves to repair a open neutral on a 4 wire 12KVA circuit?

Answer 39

Yes

Question 40

At what voltage must you wear rubber sleeves in California?

Answer 40

7,500

Question 41

Why should you check voltage across the open leg of a delta bank before making the final connection? What are you looking for?

Answer 41

Check for phasing to make sure they match

Question 42

What is the function of an automatic re-closure?

Answer 42

A mechanism that can automatically close the breaker after it has been opened due to a fault.

Question 43

In series street lighting circuit, the total circuit voltage is _____?

Answer 43

The sum of the voltage across them

Question 44

In a transformer vector, the phases are how many degrees apart?

Answer 44

120 degrees apart

Question 45

The most dangerous position to make a lift with a mobile crane.

Answer 45

Over the corner