Automobile Engineering in ME
The rolling resistance is because of the friction between the

Wheel rim and tyre
Wheel rim and road surface
None of the listed here
Tyre and the road surface

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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

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

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