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ASVAB · General

What is the function of the alternator in a vehicle?

Correct answer

Charges the battery and powers electrical systems while running

  1. A Starts the engine
  2. B Charges the battery and powers electrical systems while running
  3. C Regulates fuel injection
  4. D Controls the transmission

Why this is the answer

The alternator converts mechanical energy (from the engine belt) into electrical energy, charging the battery and supplying power to vehicle electronics while the engine runs.
Source: ASVAB AI, Electrical Systems

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