Which of these is a renewable energy source?
Coal
Nuclear fuel
Hydro-electric power
Which of these is not a fossil fuel?
Oil
Uranium
Which gas is linked to global warming?
Carbon monoxide
Sulphur dioxide
Carbon dioxide
What does it mean if an energy resource is renewable?
That it can be recycled
That it can be reused
That it can be replenished
What is the name of the system that transports electricity across the UK?
The National Grid
The International Grid
The Grid System
A step-down transformer is used to do which of the following?
To step down the current when electricity leaves a power station
To step up current when electricity goes onto the National Grid
To step down the voltage when electricity comes into our homes and factories
What is the frequency and voltage of the UK mains electricity?
50 Hz and 230 V ac
50 Hz and 230 V dc
230 Hz and 50 V ac
Which of the following are safety devices used in a plug or an appliance?
Live wire, neutral wire and metal casing
Earth wire, fuse and double insulation
Live wire, fuse and earth wire
Why is the energy demand in UK households spiking between 6 and 9 pm?
During those times most families are all at home using lights, electrical devices and the heating is on
Power stations cost more to run in the evening
Less heating is needed in the evening, but more lighting is used
Which energy resource produces the majority of electricity used globally?
Nuclear fuels
Renewable energy resources
Fossil fuels