Practice question

What is the primary function of the Positive Crankcase Ventilation (PCV) system in a petrol engine?

To pump fresh engine oil directly onto the camshaft lobes.
To route blow-by gases from the crankcase back into the intake manifold for combustion.
To inject fresh air into the catalytic converter.
To seal the crankcase from oil leaks.

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

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