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  • Chaz Robinson

  • 問題数 34 • 2/13/2024

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    問題一覧

  • 1

    inductive reactance is measured in?

    ohms

  • 2

    upon what principal does a transformer operate

    mutual induction

  • 3

    maximum emf is induced when the lines of flux cut at what degree

    90

  • 4

    voltage drop will ____ if the current to the load increases

    increase

  • 5

    which is not a kind of electrical power

    peak power

  • 6

    power factor is the ratio between _____ and_____

    KW peak, KVA peak

  • 7

    lightning can have an electrical charge up to?

    100 million volts

  • 8

    a ____ fault can be a dead short or potential short circuit depending on the impedance or resistance

    impedance

  • 9

    fault current indicators are used on overhead and underground, FCI’s trip when?

    a given current level is reached

  • 10

    to prevent tripping from down stream components FCI’s are built with a

    high degree of immunity

  • 11

    when backfilling excavation what percent of compaction is needed

    70%

  • 12

    tower footings must be able to withstand?

    uplift and down thrust

  • 13

    one method to ground a transmission steel tower is?

    counterpoise

  • 14

    when a helicopter is building a steel tower

    temporary brackets

  • 15

    dampers on a transmission line are there to

    resonate vibration

  • 16

    voltage drop will ___ if the current to the load increases

    voltage

  • 17

    a 10ths transformer can provide 20th a for as long as

    30 seconds without damage

  • 18

    a ____ sleeve leaves little to no space

    conductor

  • 19

    it takes as little as 50 volts(ac) to produce 50 milliamps either can cause

    fibrillation on the heart

  • 20

    a thumper operated by building a ______ charge

    capacitive

  • 21

    manafactures use a ____ after the equipment has been shaped and drilled

    dip galvanization

  • 22

    before stacking another piece of steel tower the bolt must be

    50% in and tightened

  • 23

    one of the most dangerous situations an electrical worker may face is

    phase to phase fault

  • 24

    other than a socket wrench another tool used for steel towers

    spud wrench

  • 25

    an OCR controll uses

    live voltage, line impedance to pin point the distance of the fault

  • 26

    two things that need to be done before using phasing equipment

    make sure the phasing set works and that the lines are energized

  • 27

    always test voltage and ____ on new equipment

    rotation

  • 28

    the most common way of sagging

    target method

  • 29

    the KH on a meter refers to

    watt hours per turn

  • 30

    backfeed can occur from

    by load or induction

  • 31

    if your working on a single phase line with OCRs you should

    remove the primary leads

  • 32

    xmfers are usually loaded to what percent

    125%

  • 33

    xmfer losses are usually called

    core and copper loss

  • 34

    proper grounding and barricading are necessary for using a

    thumper