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Which of these components is present in gasoline engine but not in diesel engine?

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While a spark plug is needed in a gasoline engine to ignite the fuel, the fuel in a diesel engine is ignited by the pressure and heat generated due to mechanical compression in the cylinder.
Uli Deck/picture alliance via Getty Images
Uli Deck/picture alliance via Getty Images
Which of these components is present in gasoline engine but not in diesel engine?
- Spark plugs
- Intercooler
- Piston
- Supercharger
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