2ND YEAR LINEMAN APPRENTICE
REVIEW EXAM QUESTIONS AND
ANSWERS
Describe a typical electric system, itemizing the major parts of the system - Correct
Answers -: Generating station, step up transmission substation, transmission line,
stepdown transmission substation, sub transmission line, distribution substation, and
industrial, commercial, and residential customers
What is a transmission line/Transmission circuit? - Correct Answers -A set of
conductors energized at voltages over 69,000 volts and transmitting large blocks of
lectical energy over relatively long distances
how do the voltage levels of transmission and sub transmission lines compare? -
Correct Answers -Sub transmission lines carry medium sized blocks of power and
usually form a grid between substations. Transmission lines carry large blocks of power
and stretch over long distances
When is a direct-current transmission line used? - Correct Answers -Where it is desired
to transmit large amounts of power over long distances or o interconnect two AC
systems that not synchronized
- List the functions that can be accomplished in an electric substation - Correct Answers
-Switch generators, equipment and circuits or lines in and out of system. Change AC
voltage from one level to another. Also able to change alternating current to direct
current
List the component parts of the electric distribution system. - Correct Answers -
Distribution substation, distribution feeder circuits, switches, protective equipment,
primary circuits, distribution transformers, secondaries and service.
Describe a typical distribution feeder circuit. - Correct Answers -: Distribution feeder
circuits leave substations serve as a source to branch to primary circuits. Several
circuits at sub and extend in different directions to serve customers.
What is a primary circuit? - Correct Answers -All high voltage distribution circuits greater
than 600 volts up to 34,500 volts
