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Fire in the diesel engine is produces by which of the following?.

  • A.Friction
  • B.Spark plug
  • C.Self starter
  • D.Compression

Answer: D

Ignition in a diesel engine is produced by compression.

Air alone is compressed to about a twentieth of its volume, which raises its temperature above 500 °C. Fuel injected into that hot air ignites of itself, so a diesel needs no spark plug - hence the name compression-ignition engine.

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