SLTC Electrical Systems test prep with
complete solutions 2025/2026
Low voltage - CORRECT ANSWER ✔✔600 v and below
Distribution Voltage - 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
complete solutions 2025/2026
Low voltage - CORRECT ANSWER ✔✔600 v and below
Distribution Voltage - 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
