- ✓ Supply electricity when the engine is off
- B Lubricate the engine's moving parts
- C Cool the engine
- D Filter the intake air
Why this is the correct answer
The battery supplies electricity to the vehicle when the engine is off, for example for starting, the lights and electrical systems.
Ready to pass the DGT theory test?
Practise official-format questions in English, with explanations after every answer and full progress tracking.
Try a free practice test