Automobile Engineering in ME
The most effective method of controlling S.I. engine exhaust emission is by

Using some additives in the fuel
Recirculating exhaust
Using catalytic converter
None of these

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Automobile Engineering in ME
In bias ply tyres

All plies run parallel to one another
All of these
Belts of steel mesh are used in the tyres
One ply layer runs diagonally one way and another layer runs diagonally the other way

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

DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
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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