Practice question

What is the purpose of the Positive Crankcase Ventilation (PCV) valve in a car engine?

To pump fresh air into the passenger compartment
To route combustion blow-by gases from the crankcase back to the intake to be burned safely
To regulate the flow of fuel from the tank
To filter road dust out of the engine oil

Answer: B — To route combustion blow-by gases from the crankcase back to the intake to be burned safely

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