Electric Review Flashcards
(60 cards)
What are the components that make up a Circuit?
Source Voltage, Wire, Load, Switching Device , Fuse
These are the essential elements required for a circuit to function.
List the types of Circuits.
- Series
- Parallel
- Open
- Close
- Short
Different configurations that affect how electricity flows in a circuit.
What does IEC stand for?
International Electrotechnical Commission
An organization that prepares and publishes international standards for electrical, electronic, and related technologies.
What is the rule regarding electricity flow?
Electricity will always want to flow from a higher voltage to a lower voltage
This is a fundamental principle of electrical circuits.
What does a Conductor do?
Offers very little resistance and allows the flow of electricity
Conductors are materials that facilitate the movement of electric charge.
What does DMM stand for?
Digital Multimeter
A device used to measure voltage, current, and resistance.
What is the purpose of Tongs in electrical measurement?
Read amperage
Tongs are used to clamp around a conductor to measure current without direct contact.
How can you increase the strength of the Magnetic Field in a Coil?
- Increasing the amount of current by increasing the amount of voltage
- Increasing the number of turns in the coil
- Inserting an Iron Core into the coil
These methods enhance the magnetic field generated by the coil.
What does NEMA stand for?
National Electrical Manufacturers Association
An organization that develops standards for electrical equipment.
What does ESD stand for?
Electrostatic Discharge
A sudden flow of electricity between two electrically charged objects.
What does the Red Box signify in electrical systems?
480 VAC
Indicates a specific voltage level used in electrical circuits.
What does the Black and Yellow Box signify?
Cranes/250 VDC
Refers to a specific application of voltage in cranes.
What colors represent High AC Voltage?
BOY (Brown, Orange, Yellow)
These colors are used for identifying high AC voltage wiring.
What is Back Taping used for?
Protecting a receptacle
A method to ensure safety and prevent accidental contact with electrical components.
What are the two types of Protection in electrical systems?
- Overcurrent (Fuses)
- Overload (Thermals)
These protect electrical circuits from damage due to excess current.
What is Ghost Voltage?
Magnetic field in the air off of other conductors flowing electrons
This phenomenon can cause misleading voltage readings.
What is the characteristic of DC Voltage?
Straight line short distances
DC voltage is typically used for low-voltage applications.
What is the characteristic of AC Voltage?
For long distances
AC voltage is more efficient for transmitting electrical energy over long distances.
What is a Generator?
A machine that converts mechanical energy to electrical energy by means of electromagnetic induction
Generators play a crucial role in energy production.
How to change the direction of a motor?
Change any 2 of the 3 leads
What is OCPD?
Over current protection device
What consumes the most energy in electric?
A motor
46% of electric energy comes from using what?
Coal
What do the bold lines mean on a print?
Indicates Power circuit
