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

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

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Automobile Engineering in ME
The auto ignition in a spark ignition engine means

Ignition induced to supplement the process of normal combustion
Automatic ignition of the charge at the end of compression
Ignition of the charge before the passage of flame front
Ignition induced by the passage of a spark

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Automobile Engineering in ME
The difference between DOT 3 and DOT 4 brake fluids is

DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 4 fluid is more resistant to freezing than DOT 3 fluid
DOT 4 fluids have a higher boiling point than DOT 3 fluid

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