Lineman Apprentice Rodeo UPDATED
ACTUAL Exam Questions and CORRECT
Answers 100%
describe the electron theory - 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 - 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
ACTUAL Exam Questions and CORRECT
Answers 100%
describe the electron theory - 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 - 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
