Practice question

What is the function of the voltage regulator inside an automotive charging system?

  1. To step up the voltage to 100V for the headlamps
  2. To maintain alternator output voltage within a safe range (typically 13.8V to 14.5V) regardless of engine speed and electrical load
  3. To convert Alternating Current (AC) into Direct Current (DC)
  4. To disconnect the starter motor once the engine fires

Answer: B — To maintain alternator output voltage within a safe range (typically 13.8V to 14.5V) regardless of engine speed and electrical load

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