Lineman Apprentice Rodeo Study
UPDATED ACTUAL Exam Questions and
CORRECT Answers
describe the electron theory - CORRECT ANSWER - everything that occupies space and has
weight, is composed of atoms. atoms are subdivided into still smaller particles called protons,
neutrons, and electrons
define an electrical current - CORRECT ANSWER - 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 - CORRECT ANSWER - materials having free electrons
define an insulator - CORRECT ANSWER - material having few free electrons
what are three examples of good insulators? - CORRECT ANSWER - glass, porcelain, rubber
what is the unit of electric current? - CORRECT ANSWER - ampere/amp
what instrument is used to measure electric current - CORRECT ANSWER - ammeter
what is the unit of electric pressure? - CORRECT ANSWER - voltage
what is the unit of electric power? - CORRECT ANSWER - watt
what is the unit of electric energy? - CORRECT ANSWER - watts
,what instrument is used to measure electric energy? - CORRECT ANSWER - voltmeter
what is the formula for ohms law? - CORRECT ANSWER - V=IxR
(voltage=CurrentxResistance
definition of alternating current - CORRECT ANSWER - 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? - CORRECT ANSWER - hertz
define the power factor of an alternating-current curcuit - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - powerplant, transmission,
transmission lines, substation, distribution
what is a transmission line? - CORRECT ANSWER - 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? - CORRECT
ANSWER - transmission circuits: 69kv-765kv, subtransmission
when is a direct current transmission line used? - CORRECT ANSWER - 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 - CORRECT ANSWER -
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 - CORRECT ANSWER - (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 - CORRECT ANSWER - 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? - CORRECT ANSWER - 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? - CORRECT ANSWER - to reduce voltage
of the primary circuit to the utilization voltage required to supply the customer
describe an electrical service - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - power transformers
tap changing equipment
steel structures
lighting arresters
circuit switchers
UPDATED ACTUAL Exam Questions and
CORRECT Answers
describe the electron theory - CORRECT ANSWER - everything that occupies space and has
weight, is composed of atoms. atoms are subdivided into still smaller particles called protons,
neutrons, and electrons
define an electrical current - CORRECT ANSWER - 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 - CORRECT ANSWER - materials having free electrons
define an insulator - CORRECT ANSWER - material having few free electrons
what are three examples of good insulators? - CORRECT ANSWER - glass, porcelain, rubber
what is the unit of electric current? - CORRECT ANSWER - ampere/amp
what instrument is used to measure electric current - CORRECT ANSWER - ammeter
what is the unit of electric pressure? - CORRECT ANSWER - voltage
what is the unit of electric power? - CORRECT ANSWER - watt
what is the unit of electric energy? - CORRECT ANSWER - watts
,what instrument is used to measure electric energy? - CORRECT ANSWER - voltmeter
what is the formula for ohms law? - CORRECT ANSWER - V=IxR
(voltage=CurrentxResistance
definition of alternating current - CORRECT ANSWER - 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? - CORRECT ANSWER - hertz
define the power factor of an alternating-current curcuit - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - powerplant, transmission,
transmission lines, substation, distribution
what is a transmission line? - CORRECT ANSWER - 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? - CORRECT
ANSWER - transmission circuits: 69kv-765kv, subtransmission
when is a direct current transmission line used? - CORRECT ANSWER - 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 - CORRECT ANSWER -
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 - CORRECT ANSWER - (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 - CORRECT ANSWER - 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? - CORRECT ANSWER - 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? - CORRECT ANSWER - to reduce voltage
of the primary circuit to the utilization voltage required to supply the customer
describe an electrical service - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - power transformers
tap changing equipment
steel structures
lighting arresters
circuit switchers
