Question 1595 · Truck theory test
What is the primary purpose of the battery fitted to a petrol - or diesel - powered motor vehicle?
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Correct answer
To start the engine.
Official explanation
The primary purpose of the battery is to start the engine. When the engine is running, it produces its own electricity to charge the battery and run the various electrical components, including lights, heating, radio, and so on.
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- Technical matters · Vehicle Mechanics
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- This question also appears in the bus theory test.
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