Practice question

What is the main purpose of the thermostat in an engine cooling system?

  1. To pump coolant through the radiator
  2. To control coolant flow so the engine warms up quickly and stays at operating temperature
  3. To measure the level of coolant in the tank
  4. To filter dirt out of the coolant

Answer: B — To control coolant flow so the engine warms up quickly and stays at operating temperature

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