Physics · Thermal Engineering
A knocking condition occurs in a spark-ignition engine primarily when the fuel-air mixture:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Burns while both valves remain fully open
- 2Burns rapidly or auto-ignites prematurely✓
- 3Produces extremely high torque at low speeds
- 4Has a very low compression ratio
Correct answer
Burns rapidly or auto-ignites prematurely
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