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

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Automobile Engineering in ME
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is

Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads

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