Overhead Line Design Quiz

What is the role of structures in overhead line design?

• To carry electric current

• To protect from lightning

• To support conductors

• To transfer loads to the ground

Which component transfers to the ground the various dead and live loads of the tower and conductors?

• Shield and ground wire

• Insulators

• Conductors

• Foundation

What happens to the sag when the tension of the conductors is higher?

• The sag increases

• The sag decreases

• The sag stays the same

• The sag disappears

What happens to the sag when the tension of the conductors is lesser?

• The sag increases

• The sag decreases

• The sag stays the same

• The sag disappears

Why are insulators used in electrical equipment?

• To conduct electricity

• To support and separate electrical conductors

• To generate electricity

• To store electricity

Which of these is a property of insulators?

• Low electrical resistance

• High electrical resistance

• Magnetic properties

• Conductive properties

Which material is NOT an insulator?

• Ceramic

• Paper

• Copper

• Glass

Where are pin insulators secured?

• On the ground

• To the cross-arm on the pole

• Inside a building

• On a tree

Up to what voltage are pin insulators normally used?

• 10 kV

• 20 kV

• 33 kV

• 50 kV

What is one of the main reasons for insulation failure?

• Natural deterioration due to aging

• Excessive sunlight

• Lack of use

• Overuse of insulation