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

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

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Automobile Engineering in ME
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

Pressurise the fuel system before the engine is started
Warm up and lubricate the pump
Enable the pump's fault diagnosis function to operate
Supplies a large amount of fuel and thereby creates a choke effect

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