Question:easy

The compression ratios of petrol engines lie in the range of

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To remember the compression ratios:
- Petrol (Spark Ignition) engines: Low ratio (5 to 10) to prevent knocking.
- Diesel (Compression Ignition) engines: High ratio (15 to 22) to enable self-ignition.
Updated On: Jul 23, 2026
  • 3 to 6
  • 5 to 8
  • 15 to 20
  • 30 to 40
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The Correct Option is B

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