Practice question

What is the primary function of the Positive Crankcase Ventilation (PCV) valve?

  1. To inject fresh air into the exhaust manifold to burn residual hydrocarbons
  2. To route harmful blow-by gases from the crankcase back into the intake manifold
  3. To prevent engine oil from entering the combustion chamber
  4. To regulate the pressure inside the fuel tank

Answer: B — To route harmful blow-by gases from the crankcase back into the intake manifold

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