Causes of pre-ignition in a spark-ignition (petrol) engine: identify the correct cause(s). Pre-ignition is spontaneous ignition before normal spark timing at the end of the compression stroke. Choose the best option.
Mechanical Engineering
IC Engines and Nuclear Power Plants
Difficulty: Easy
Choose an option
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ACylinder walls too hot
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BOverheated spark-plug points
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CRed-hot carbon deposits on the walls
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DAny one of these (all are possible causes)
Answer
Correct Answer: Any one of these (all are possible causes)
Explanation
ConceptPre-ignition is triggered by local hot spots that ignite the mixture prematurely. Common hot spots include overheated plug electrodes, glowing carbon deposits, or excessively hot combustion-chamber surfaces.
Final AnswerAny one of these (all are possible causes).