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ASVAB · General

What does a thermostat regulate in a vehicle's cooling system?

Correct answer

Engine temperature

  1. A Fuel flow
  2. B Engine temperature
  3. C Oil pressure
  4. D Battery voltage

Why this is the answer

The thermostat regulates coolant flow to maintain optimal engine operating temperature — it opens when the engine reaches operating temp to allow coolant to flow through the radiator.
Source: ASVAB AI, Cooling System

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