Automobile Engineering in ME
The most accurate ignition system of a spark ignition engine is

Electronic control unit system
Magneto and electronic system
Magneto system
Battery system

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Automobile Engineering in ME
The crankcase dilution means

Dilution of oil by water in the crankcase
Dilution of mixture passing through crankcase in two stroke engines
Dilution of lubrication oil by fuel in the crankcase D. Dilution
Dilution of fuel in the crankcase

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