Practice question

What is the function of the PCV (Positive Crankcase Ventilation) valve in a light vehicle engine?

To route blow-by gases from the crankcase back into the intake manifold for combustion
To regulate the fuel pressure in the common rail fuel injection system
To filter out microscopic metallic particles from the engine oil
To control the air-fuel ratio during cold engine startups

Answer: A — To route blow-by gases from the crankcase back into the intake manifold for combustion

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