LINEMAN APPRENTICE RODEO
CERTIFICATION EVALUATION VERIFIED
QUESTIONS AND SOLUTIONS FULL REVIEW
PACK
●● define an electrical current
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
Answer: materials having free electrons
●● define an insulator
Answer: material having few free electrons
●● what are three examples of good insulators?
Answer: glass, porcelain, rubber
●● what is the unit of electric current?
Answer: ampere/amp
,●● what instrument is used to measure electric current
Answer: ammeter
●● what is the unit of electric pressure?
Answer: voltage
●● what is the unit of electric power?
Answer: watt
●● what is the unit of electric energy?
Answer: watts
●● what instrument is used to measure electric energy?
Answer: voltmeter
●● what is the formula for ohms law?
Answer: V=IxR (voltage=CurrentxResistance
●● definition of alternating current
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?
Answer: hertz
●● define the power factor of an alternating-current curcuit
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
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
Answer: powerplant, transmission, transmission lines, substation,
distribution
●● what is a transmission line?
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?
Answer: transmission circuits: 69kv-765kv, subtransmission
CERTIFICATION EVALUATION VERIFIED
QUESTIONS AND SOLUTIONS FULL REVIEW
PACK
●● define an electrical current
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
Answer: materials having free electrons
●● define an insulator
Answer: material having few free electrons
●● what are three examples of good insulators?
Answer: glass, porcelain, rubber
●● what is the unit of electric current?
Answer: ampere/amp
,●● what instrument is used to measure electric current
Answer: ammeter
●● what is the unit of electric pressure?
Answer: voltage
●● what is the unit of electric power?
Answer: watt
●● what is the unit of electric energy?
Answer: watts
●● what instrument is used to measure electric energy?
Answer: voltmeter
●● what is the formula for ohms law?
Answer: V=IxR (voltage=CurrentxResistance
●● definition of alternating current
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?
Answer: hertz
●● define the power factor of an alternating-current curcuit
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
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
Answer: powerplant, transmission, transmission lines, substation,
distribution
●● what is a transmission line?
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?
Answer: transmission circuits: 69kv-765kv, subtransmission
