Electricity Exam Flashcards
Gold is considered a good insulator.
False
What is a measure of electric current?
Amperage
What is the name for the technology that converts sunlight into electricity?
Photovoltaics
What is the name for an electrical cable consisting of a flexible metal covering?
BX Cable
What is another name for electrical potential difference or “electrical pressure”?
Voltage
NEC stands for . ..
National Electrical Code
Ohm’s Law establishes the relationship between:
Voltage, current, and resistance
A complete conduction path that carries electrical current from a source of electricity to and through some electrical device and back to the sources called :
An electrical circuit
Consumption of electricity in the US has gone down over time due to the increased efficiency of lighting and appliances.
False
What is the matching electrical unit for energy:
Watt Hour
What is the matching electrical unit for power:
Watt
“Romex” is a type of:
Non metallic sheathed cable(typically used in small buildings).
The frequency of AC current in the US is 60 cycles per second.
True
Wind turbines generate electricity with steam generators.
False
What are 3 general code requirements for outlets in a room?
- Minimum number of outlets in a room.
- Maximum number of receptacles per unit.
- Maximum horizontal distance between receptacles in a room.
What is the main advantage of AC current?
It can be sent long distance more easily than DC.
New homes are typically wired with haw many amps?
200-400
What is the standard system of measuring wire sizes in the US?
Brown & Sharpe wire Guage of (AWG)
Which of the following is NOT considered a type of electrical conduit:
FX
Which of the following is NOT considered a conductor:
Glass
Which of the following system voltages is most likely to be used as the primary distribution system in a large commercial or institutional building:
277/480 volt - Three phase
