PPT 1 Electrical Supplies and Equipment Identification Quiz

What is the purpose 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

From what voltage to what voltage does the 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 is electricity transmitted at very high voltages?

• To reduce power loss through power lines

• To increase power loss through power lines

• To decrease the speed of transmission

• To make the system more complex

What are the voltage levels of the supergrid mentioned in the document?

• 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 voltage to 400kV.

• They distribute electricity directly to homes.

At what voltage is electricity typically distributed to large commercial buildings?

• 11kV

• 33kV

• 400V

• 230V

How is electricity finally distributed to customers?

• Through overhead lines.

• Via a network of radial circuits.

• Directly from the generation station.

• Through a series of transformers.

What voltage supply enters a dwelling at the mains intake?

• 110V

• 230V

• 240V

• 120V

What type of fuse is provided by the supplier for a dwelling?

• 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 provided by the supplier?

• To regulate voltage

• To measure consumption

• To control current

• To provide backup power