What is a sign of a properly functioning alternator?

Answer: B — No cracked or bent parts

A sign of a properly functioning alternator is that there are no cracked or bent parts. The alternator is crucial for charging the battery while the engine is running and for providing power to the vehicle's electrical systems. If the alternator has cracked or bent components, it may not function efficiently, potentially leading to electrical failures or an inability to charge the battery adequately. In addition to physical integrity, a well-maintained alternator contributes to stable voltage output, ensuring that the electrical systems of the vehicle operate smoothly. Regular inspections should include checking for any signs of wear or damage, as these can indicate that the alternator might be at risk of failing or may already be compromised.