UK Electrical Generation Quiz

What is the frequency of the alternating current (AC) produced by the rotor in UK electrical generation?

• 30 hertz

• 50 hertz

• 60 hertz

• 100 hertz

What is the purpose of the transformer in the UK electrical generation process?

• To decrease the voltage from 22,000 volts to 400 volts

• To increase the voltage from 22,000 volts up to 400,000 volts

• To convert AC to DC

• To generate electricity

At what voltage does the National Grid transmit electricity to compensate for power loss through supergrid power lines?

• 11kV and 400V

• 22,000 volts and 275,000 volts

• 400kV and 275kV

• 400 volts and 275 volts

How is electricity finally distributed to customers?

• Via overhead power lines

• Via an underground supply network of radial circuits

• Directly from the power station

• Through local sub-stations only

What is the breaking capacity of the fuse provided by the supplier at the mains intake of a dwelling?

• 75A

• 100A

• 230A

• 400A

What is used to measure consumption at a dwelling's mains intake?

• A sealed energy meter

• A distribution transformer

• A supplier's fuse

• Meter tails

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

• 11kV

• 33kV

• 230V

• 400V

Which part of the electrical installation is still owned by the electricity supplier?

• The meter tails

• The dwelling's internal wiring

• The supplier's fuse and cables up to the meter

• The energy meter

What is the purpose of the earth cable in electrical systems?

• To provide a zero-volt path for any potential fault current to flow to earth

• To increase the voltage of the electrical system

• To carry the main electrical supply to the consumer unit

• To prevent water from entering the electrical system

What should the earth cable be known as according to the text?

• Protective conductor

• Safety switch

• Protective device

• Fault interrupter