CFESA ELECTRIC STUDY GUIDE
Voltage - Answer -Potential difference or driving force of electrons between two lines
Current - Answer -Measured in amps. Movement of electrons through a circuit when a
difference of potential exists.
Direct current (DC) - Answer -Circuit electrons flow in only one direction from negative
to positive.
Frequency - Answer -(Hertz) number of times the alternating current changes from 0 to
its peak positive then zero to peak negative then back to zero.
Power - Answer -Amount of energy used. Determined by voltage, current, and
resistance in a circuit.
Resistance - Answer -Impedance or opposition to the flow of current. Measured in
Ohms. Every circuit must have resistance.
Circuit - Answer -a path for an electrical current to flow around
Series circuit - Answer -An electric circuit with a single path. (Castle wall)
Parallel circuit - Answer -A circuit that contains more than one path for current flow.
(Parachute)
Series-Parallel Circuit - Answer -Combination of series and parallel circuits.
Continuity - Answer -Continuous or or unbroken path for current to flow.
short circuit - Answer -Accidental connection of lower resistance within a circuit.
Dead Short - Answer -Hot touches ground or two hot lines touch.
Safety ground - Answer -External path to ground from an enclosure of an electrical
device. Used to protect people.
DC Power - Answer -direct current
unbalanced load - Answer -Current is not the same on all the lines.
Kirchoff's Current Law - Answer -The current that goes into a branch is equal to the
current that comes out of a branch.
What 3 things to know about contactors - Answer -Cool voltage
Voltage - Answer -Potential difference or driving force of electrons between two lines
Current - Answer -Measured in amps. Movement of electrons through a circuit when a
difference of potential exists.
Direct current (DC) - Answer -Circuit electrons flow in only one direction from negative
to positive.
Frequency - Answer -(Hertz) number of times the alternating current changes from 0 to
its peak positive then zero to peak negative then back to zero.
Power - Answer -Amount of energy used. Determined by voltage, current, and
resistance in a circuit.
Resistance - Answer -Impedance or opposition to the flow of current. Measured in
Ohms. Every circuit must have resistance.
Circuit - Answer -a path for an electrical current to flow around
Series circuit - Answer -An electric circuit with a single path. (Castle wall)
Parallel circuit - Answer -A circuit that contains more than one path for current flow.
(Parachute)
Series-Parallel Circuit - Answer -Combination of series and parallel circuits.
Continuity - Answer -Continuous or or unbroken path for current to flow.
short circuit - Answer -Accidental connection of lower resistance within a circuit.
Dead Short - Answer -Hot touches ground or two hot lines touch.
Safety ground - Answer -External path to ground from an enclosure of an electrical
device. Used to protect people.
DC Power - Answer -direct current
unbalanced load - Answer -Current is not the same on all the lines.
Kirchoff's Current Law - Answer -The current that goes into a branch is equal to the
current that comes out of a branch.
What 3 things to know about contactors - Answer -Cool voltage
