312 - Electrical supplies to the property

What is the role of a transformer in the electrical generation process?

• To decrease the voltage

• To increase the voltage

• To convert AC to DC

• To store electrical energy

what voltage does a transformer increase the electromotive force?

• 10,000 volts to 100,000 volts

• 22,000 volts to 400,000 volts

• 50,000 volts to 500,000 volts

• 30,000 volts to 300,000 volts

Why does electricity need to be transmitted at very high voltages?

• To reduce power loss through power lines

• To increase the speed of transmission

• To decrease the cost of electricity

• To improve the quality of electricity

What are the typical voltages of a supergrid ?

• 400kV and 275kV

• 132kV and 33kV

• 11kV and 400V

• 230V and 400V

What is the role of sub-stations in the National Grid?

• They generate electricity.

• They transform the electrical supply down to 11kV.

• They increase the electrical supply to 400kV.

• They store electricity for later use.

At what voltage is electricity finally distributed to customers?

• 11kV

• 132kV

• 400V

• 230kV

How is electricity distributed to customers after being transformed to 400V?

• Through overhead power lines.

• Via an underground supply.

• By wireless transmission.

• Through solar panels.

What voltage supply will enter a dwelling at the mains intake ?

• 110V

• 230V

• 240V

• 120V

What type of fuse is provided by the supplier?

• Low breaking capacity (LBC) fuse

• Medium breaking capacity (MBC) fuse

• High breaking capacity (HBC) fuse

• Standard fuse

What is the purpose of the sealed energy meter mentioned?

• To regulate voltage

• To measure consumption

• To provide backup power

• To control the current