Quiz: What does the term ‘engine knock’ refer to, and what causes September 12, 2025 by Alex Turner What does the term ‘engine knock’ refer to, and what causes it? Discover more about Vehicle Engine and Automobile at our home page. A) A knocking noise from the engine caused by premature combustion of the air-fuel mixture. B) A sound produced by loose engine parts due to insufficient lubrication. C) A vibration felt in the steering wheel when the engine is idling. D) A warning signal indicating low fuel pressure in the engine. Submit Answer