Test 3-1 Old Flashcards
A _____ is a skilled tradesman who has completed a prescribed apprenticeship in a particular trade.
Journeyman
As an Electrical Worker apprentice, you began a training period that embraced two basic concepts, the _____ of our trade.
Why and the how
The “how” of your trade is learned _____.
On the job.
The development of personal pride requires _____ and dedication
Effort.
The _____ curriculum must be used in order for an apprentice to qualify for ACE/NJATC college credit recommendation.
IBEW
The industry that employs the largest number of workers in the United States is the _______ industry.
Construction
In recent years, the ____ has provided an essential and stabilizing function for the construction industry.
Union referral system.
The IBEW acronym COMET stand for _____.
Construction Organizing Membership Employee Training
Issuing press releases for charitable work, fund raising , and monetary donations can enhance ____ at the local level.
Our public image.
The use of a cell phone on the job should be kept to business only, and personal use should be kept to _____
Off the clock
Working ____ increases productivity because inspection help prevent major breakdowns in equipment and following safety procedures help complete a job on time.
Safely
Productivity increases when everyone on the crew has a sense of contribution to the final project through ____.
Job briefings
to provide real time information, many companies are installing ___ units on all or part of their fleets
GPS
They delta system is also called a ____ system.
Three-wire
In a ___ system, the coil voltage and the phase-to-phase voltage are the same.
Delta
Current flow in a wye circuit is about _____ than in an equivalent delta circuit.
58%
Electricity can be transmitted more efficient over long distances by using ____.
Higher voltage
when voltages and current reach their maximum and zero values at the same time they are said to be _____.
In phase
The peak value of A is equal to _____ RMS value or the square root of 2.
1.414
In an AC circuit, the RMS value is e_____ times the peak value.
0.070
Impedance is measured in____
Ohms
Capacitive reactance is measured in ___.
Ohms
The product of the total voltage and the total current in an AC circuit is _____ power.
Apparent
When a conductor moves through the magnetic line of flux, the induced voltage will cause a(n) _____ on the electrons.
Electromotive force (EMF)
A coil of wire wrapped around a core is called a(n)
Inductor
The ability to induce a voltage into itself is called _____.
Self-induction
Capacitors store ____ and release energy opposing the reactive energy caused by inductor.
KVARs
Three factors affect the capacitance of capacitor: the area of the plates, the distance between the plates, and_____.
the type of dielectric.
A transformer is an example of a(n) ___ that would cause low power factor.
inductive.
When capacitors are installed ___ is introduced into the circuit, which ne the inductive reactance.
Capacitive reactance
In a capacitor, the ____ reaches its the voltage reaches its peak.
Current
Large capacitors have ____ to all energization or de-energization
Oil switches
generated in the ___ is of alternating current(AC)
95%
Approximately all the electricity generated in the United States is of the AC type and at _______ Hertz(cycles).
60
Systems of hertz can be changed to 50 hertz system by using _____ to accommodate customer needs.
Generators
In the delta system, only ____ voltage(s) is/are available.
One
If two voltage cross the baseline at the same time going in opposite directions yet have the same frequency, they are said to be ____ out of phase.
180 degrees
On a closed wye-delta bank, the neutral bus is sometimes referred to as the _____ and should always be insulated from ground
Floating neutral
In the open delta connection,the corner capacity of the two transformers is on their total nameplate capacity.
87%
What type of bank configuration can o transformers be used in
None
The term ____ is used in electrical work to the earth as zero potential.
ground
To ____ a transformer means to connect neutral to earth
Ground
A good safe practice, a transformer should be ___ before working around
Grounded
When dealing with transformer bank ___ basic types of connections that co made; one of them is the wye wye connection
6
The neutral bus on a closed wye-delta bank is sometimes referred to as the ____ and should always be insulated from ground.
Floating neutral
Which of the following must be considered when banking transformers together to meet a customer’s service needs?
II impedance value III KVA IV Primary Voltage VI Secondary Voltage V Polarity VI Secondary Voltage
The basic rule for connecting three coils of a wye-connected transformer bank is ____.
like markings of each coil are connected to common point
One of the fastest ways to determine which transformer in a bank needs to replaced is _____ and test transformers.
To isolate
In the delta-connected bank,the voltage of the coils is____ voltage across
Equal t
In order to gather data during a spe period on three-phase transformer _____ are performed
Load checks
