Practice question

What is the function of the expansion tank in a vehicle's cooling system?

  1. To store extra fuel for emergency situations
  2. To catch and store overflowing coolant as it heats and expands, returning it to the radiator when cool
  3. To increase the pressure of the windshield washer fluid
  4. To house the air conditioning refrigerant

Answer: B — To catch and store overflowing coolant as it heats and expands, returning it to the radiator when cool

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