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

Warm up and lubricate the pump
Pressurise the fuel system before the engine is started
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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Automobile Engineering in ME
Which one of the following statements correctly describes the construction of a planetary gear type differential?

The six planetary pinions rotate in constant mesh with the internal gears.
One drive shaft is splined to the central gear and the other to the planetary gear.
The internal gear is fixed to the planetary gear.
Each planetary pinion gear meshes with both the central gear and the internal gear.

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