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52 Terms
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Voltage
Potential energy or potential difference.
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Resistance
The opposition to current flow.
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Watts
The unit of measurement for power
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Power Source
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Fuse
A safety device used to eliminate damage to equipment by opening (blowing) and must be replaced after it blows.
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Mega
The metric unit for one million
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Load
The component, device or circuit that drains current or power from the source.
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Conductor
Used to carry current from the source to the load or a material that allows the movement of electrons with minimum opposition.
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Ground
A common reference point for electronic circuits or a part of a circuit connected directly to earth.
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Current
The movement of electrons in a circuit.
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GFCI
Used where power outlets are required in demp or wet locations.
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Power
Ability to do work or the conversion of one form of energy to another.
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Ohms
Unit of measurement for resistance.
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Circuit Breaker
A safety device used to provide protection from a short circuit or power surges can be manually reset.
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Circuit
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Kilo
The metric unit for one thousand.
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Insulator
Prevents undesired current flow from the conductors to other objects.
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Volts
The unit of measure for voltage.
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Ampere
The unit of measurement for current.
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Voltage
Capacitance is the property of a capacitor opposing a change in ...
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Current
Inductance is the property of an inductor opposing a change in ...
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Ground ground, chassis ground and equipment ground.
What are the three types of ground?
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What is three phase power?
Power produced by three sinusoidal waves with intervals of 120 degrees.
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What are the two basic formats for the three phase operation.
Wye and delta
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What is the advantage to three phase over single phase?
The advantage is less current flow, permitting the use of smaller less expensive wire.
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How far should ground rods be away from personnel walkways.
Six feet
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The general rule of thumb is that the smaller the gauge number, the larger the diameter.
Which is larger a 12 gauge or 16 gauge wire?
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The ratio of real power to apparent power.
What is power factor?
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Three wire connection, four wire connection, and five wire connection.
What are the three generator configurations for three phase operations?
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Single phase power is power produced by one sinusoidal waveform.
What is single phase power?
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Process of producing or generating voltage and current to be provided to a system or systems for practical applications.
What is power integration or power generation?
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KW and KVA
What units are the most for generating power?
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The actual power which is transferred to the load.
What is real power or true power?
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Wet stacking
Indicates the presence of unburned fuel or carbon, or both, in the exhaust system.
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Convert an AC input into a steady DC output
What is the purpose of power supply?
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Smoothes the output voltage, the first step in maintaining a steady output.
What is filtering in power supply?
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An electrical apparatus that provides emergency power to the load when the input power source fails.
What is uninterrupted power supply used for
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The small alternating current that appears on th direct current part of the waveform.
Ripple
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Incoming AC voltage is switched on and off at very high frequencies and a line connected power supply does not do this.
Switching power supply
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An electronic device or circuitry that changes direct current (DC) to alternating current (AC).
(Power) Inverter
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Provide clean AC power to sensitive electrical equipment. Take in main line power and modifies it based on the requirements of the system to which they are connected.
AC Power conditioner and power line conditioner
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Voltage conversion
Changes the 115/230 VAC line voltage into one or more other voltages as determined by application
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Rectification
Turning AC into DC
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Regulation
Making the output voltage(s) independent of line and load variations.
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Isolation
Separating the supply outputs from any direct connections to the AC lines.
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Capacitor
What component performs filtering?
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Current
What is the electrical phenomenon that injures and kills
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Gain
The ratio of output to input
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Current in a capacitive circuit leads voltage by 90 degrees
ICE
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Voltage in an inductive circuit leads current by 90 degrees