SLTC ELECTRICAL SYTEMS TEST PREP QUESTIONS AND
ANSWERS
Low voltage - CORRECT ANSWER✅✅✅600 v and below
Distribution Volatage - CORRECT ANSWER✅✅✅2kv to 34.5
Sub Trans voltage - CORRECT ANSWER✅✅✅46kv to 161kv
Trans voltage - CORRECT ANSWER✅✅✅230kv to 765kv
Ultra high voltage - CORRECT ANSWER✅✅✅800kv and up
What is the basic function of transmission sytems? - CORRECT ANSWER✅✅✅To transmit large
amounts of bulk power over long distances
What are the two types of power transmission? - CORRECT ANSWER✅✅✅Overhead and
Underground
Transmission lines are bundled which means what? - CORRECT ANSWER✅✅✅More than 2
conductors per phase
How can power be increased? - CORRECT ANSWER✅✅✅By increasing voltage and by increasing the
current
What are the four main components of overhead transmission lines - CORRECT
ANSWER✅✅✅Structures, insulators, conductors, static wire
Do static wires carry any load? - CORRECT ANSWER✅✅✅No
, What does static wire do? - CORRECT ANSWER✅✅✅Protect from lightning strikes
Why do we use wood structure poles? - CORRECT ANSWER✅✅✅They are relatively cheap
Why do we use concrete poles? - CORRECT ANSWER✅✅✅For larger wire, and due to their
strengths.
Why steel poles? - CORRECT ANSWER✅✅✅More pleasing to the public and are lightweight
compared to concrete poles
Steel poles are what? - CORRECT ANSWER✅✅✅Self supporting but still need bolted down
Lattice type steel requires what? - CORRECT ANSWER✅✅✅Extensive footing
What are the two basic types of counterpoise sytems - CORRECT ANSWER✅✅✅Continuous and
radial
What does an insulator do? - CORRECT ANSWER✅✅✅Restricts the flow of an electric current.
What did insulators use to be and what out of and what are they made out of today? - CORRECT
ANSWER✅✅✅Used to be glass and porcelain, now they tend to use fiberglass and polymer.
Why polymer insulators? - CORRECT ANSWER✅✅✅Lighter and more durable
What do conductors do? - CORRECT ANSWER✅✅✅Permit flow of electrical current
What are the three types of aluminum conductors? - CORRECT ANSWER✅✅✅ACSR
AAC
AAAC
ANSWERS
Low voltage - CORRECT ANSWER✅✅✅600 v and below
Distribution Volatage - CORRECT ANSWER✅✅✅2kv to 34.5
Sub Trans voltage - CORRECT ANSWER✅✅✅46kv to 161kv
Trans voltage - CORRECT ANSWER✅✅✅230kv to 765kv
Ultra high voltage - CORRECT ANSWER✅✅✅800kv and up
What is the basic function of transmission sytems? - CORRECT ANSWER✅✅✅To transmit large
amounts of bulk power over long distances
What are the two types of power transmission? - CORRECT ANSWER✅✅✅Overhead and
Underground
Transmission lines are bundled which means what? - CORRECT ANSWER✅✅✅More than 2
conductors per phase
How can power be increased? - CORRECT ANSWER✅✅✅By increasing voltage and by increasing the
current
What are the four main components of overhead transmission lines - CORRECT
ANSWER✅✅✅Structures, insulators, conductors, static wire
Do static wires carry any load? - CORRECT ANSWER✅✅✅No
, What does static wire do? - CORRECT ANSWER✅✅✅Protect from lightning strikes
Why do we use wood structure poles? - CORRECT ANSWER✅✅✅They are relatively cheap
Why do we use concrete poles? - CORRECT ANSWER✅✅✅For larger wire, and due to their
strengths.
Why steel poles? - CORRECT ANSWER✅✅✅More pleasing to the public and are lightweight
compared to concrete poles
Steel poles are what? - CORRECT ANSWER✅✅✅Self supporting but still need bolted down
Lattice type steel requires what? - CORRECT ANSWER✅✅✅Extensive footing
What are the two basic types of counterpoise sytems - CORRECT ANSWER✅✅✅Continuous and
radial
What does an insulator do? - CORRECT ANSWER✅✅✅Restricts the flow of an electric current.
What did insulators use to be and what out of and what are they made out of today? - CORRECT
ANSWER✅✅✅Used to be glass and porcelain, now they tend to use fiberglass and polymer.
Why polymer insulators? - CORRECT ANSWER✅✅✅Lighter and more durable
What do conductors do? - CORRECT ANSWER✅✅✅Permit flow of electrical current
What are the three types of aluminum conductors? - CORRECT ANSWER✅✅✅ACSR
AAC
AAAC
