Practice question

What is the function of the PCV (Positive Crankcase Ventilation) valve in an engine?

  1. To control the amount of fuel entering the cylinders
  2. To redirect unburnt blow-by gases from the crankcase back into the intake manifold
  3. To pump oil to the overhead camshafts
  4. To regulate the pressure inside the air conditioning system

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

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