Lineman Apprentice Rodeo Question and Answer
[2026] | UPDATED ACTUAL Exam | Complete Exam
Prep
• define an electrical current -✓✓ when electrical pressure is applied across the
length of wire, the free electrons in the wire give up their random motion and move
or flow in one general direction.
• define a conductor -✓✓ materials having free electrons
• define an insulator -✓✓ material having few free electrons
• what are three examples of good insulators? -✓✓ glass, porcelain, rubber
• what is the unit of electric current? -✓✓ ampere/amp
• what instrument is used to measure electric current -✓✓ ammeter
• what is the unit of electric pressure? -✓✓ voltage
• what is the unit of electric power? -✓✓ watt
• what is the unit of electric energy? -✓✓ watts
• what instrument is used to measure electric energy? -✓✓ voltmeter
,• what is the formula for ohms law? -✓✓ V=IxR (voltage=CurrentxResistance
• definition of alternating current -✓✓ electric current which periodically passes
through a regular succession of changing values, both positive and negative
• what is the unit of an alternating-current frequency? -✓✓ hertz
• define the power factor of an alternating-current curcuit -✓✓ the ratio of the
actual power to the product of volts times amperes
PF=watts/VoltsxAmperes
• describe the theory of operation of an electric transformer -✓✓ voltage must be
stepped up and then must be stepped down. the transformer is the apparatus used to
make these changes
• describe a typical electric system -✓✓ powerplant, transmission, transmission
lines, substation, distribution
• what is a transmission line? -✓✓ a set of conductors energized at over 69,000
volts and transmitting large blocks of electrical energy over relatively long
distances
• how do voltage levels of transmission, subtransmision, and distribution differ? -
✓✓ transmission circuits: 69kv-765kv, subtransmission
• when is a direct current transmission line used? -✓✓ to transmit large amounts of
power over long distances or to interconnect two AC systems that are not
synchronized
, • list of functions that can be accomplished in an electric substation -✓✓ switch
generators, equipment, and circuits or lines in/out of the system, change AC
voltage from on level to another, or changing AC->DC or DC->AC
• list the component parts of the electrical distribution system -✓✓ (1) distribution
substation, (2) distribution feeder circuits, (3) switches, (4) protective equipment,
(5) primary circuits, (6) distribution transformers, (7) secondaries, and (8) services
• describe a traditional distribution feeder circuit -✓✓ serve as a source to branch
or primary circuits and are often referred to as distribution main-feeder or express
feeder circuits
• what is a primary circuit? -✓✓ distribution circuits greater than 600 volts up to
69,00 volts are often referred to as primaries by lineman
• what is the purpose of a distribution transformer? -✓✓ to reduce voltage of the
primary circuit to the utilization voltage required to supply the customer
• describe an electrical service -✓✓ the wire extending from the distribution
transformer, adjacent to the customers property to the customers premises are
called a service
• what is the purpose of an electric substation -✓✓ an electrical substation is an
installation with electrical equipment capable of interrupting or establishing
electrical circuits and changing voltage, frequency, or other characteristics of the
electrical energy flowing in the circuits
• equipment found in a typical substation -✓✓ power transformers
[2026] | UPDATED ACTUAL Exam | Complete Exam
Prep
• define an electrical current -✓✓ when electrical pressure is applied across the
length of wire, the free electrons in the wire give up their random motion and move
or flow in one general direction.
• define a conductor -✓✓ materials having free electrons
• define an insulator -✓✓ material having few free electrons
• what are three examples of good insulators? -✓✓ glass, porcelain, rubber
• what is the unit of electric current? -✓✓ ampere/amp
• what instrument is used to measure electric current -✓✓ ammeter
• what is the unit of electric pressure? -✓✓ voltage
• what is the unit of electric power? -✓✓ watt
• what is the unit of electric energy? -✓✓ watts
• what instrument is used to measure electric energy? -✓✓ voltmeter
,• what is the formula for ohms law? -✓✓ V=IxR (voltage=CurrentxResistance
• definition of alternating current -✓✓ electric current which periodically passes
through a regular succession of changing values, both positive and negative
• what is the unit of an alternating-current frequency? -✓✓ hertz
• define the power factor of an alternating-current curcuit -✓✓ the ratio of the
actual power to the product of volts times amperes
PF=watts/VoltsxAmperes
• describe the theory of operation of an electric transformer -✓✓ voltage must be
stepped up and then must be stepped down. the transformer is the apparatus used to
make these changes
• describe a typical electric system -✓✓ powerplant, transmission, transmission
lines, substation, distribution
• what is a transmission line? -✓✓ a set of conductors energized at over 69,000
volts and transmitting large blocks of electrical energy over relatively long
distances
• how do voltage levels of transmission, subtransmision, and distribution differ? -
✓✓ transmission circuits: 69kv-765kv, subtransmission
• when is a direct current transmission line used? -✓✓ to transmit large amounts of
power over long distances or to interconnect two AC systems that are not
synchronized
, • list of functions that can be accomplished in an electric substation -✓✓ switch
generators, equipment, and circuits or lines in/out of the system, change AC
voltage from on level to another, or changing AC->DC or DC->AC
• list the component parts of the electrical distribution system -✓✓ (1) distribution
substation, (2) distribution feeder circuits, (3) switches, (4) protective equipment,
(5) primary circuits, (6) distribution transformers, (7) secondaries, and (8) services
• describe a traditional distribution feeder circuit -✓✓ serve as a source to branch
or primary circuits and are often referred to as distribution main-feeder or express
feeder circuits
• what is a primary circuit? -✓✓ distribution circuits greater than 600 volts up to
69,00 volts are often referred to as primaries by lineman
• what is the purpose of a distribution transformer? -✓✓ to reduce voltage of the
primary circuit to the utilization voltage required to supply the customer
• describe an electrical service -✓✓ the wire extending from the distribution
transformer, adjacent to the customers property to the customers premises are
called a service
• what is the purpose of an electric substation -✓✓ an electrical substation is an
installation with electrical equipment capable of interrupting or establishing
electrical circuits and changing voltage, frequency, or other characteristics of the
electrical energy flowing in the circuits
• equipment found in a typical substation -✓✓ power transformers
