Engineering · Diesel — Combustion
Ignition of the fuel in a diesel engine is initiated by:
- AA spark plug
- BA glow plug during normal running
- CThe high temperature of air compressed in the cylinder✓ Correct
- DAn electric igniter in the injector
Explanation
Diesels are compression-ignition engines. Air compressed to a high ratio reaches a temperature above the fuel's autoignition point, so injected fuel ignites without a spark.
Authority: Diesel Engines (USCG engineering topic)
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