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.
Each planetary pinion gear meshes with both the central gear and the internal gear.
The internal gear is fixed to the planetary gear.
One drive shaft is splined to the central gear and the other to the planetary gear.

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Automobile Engineering in ME
In a ventilated disc brake

Caliper is covered with cooling fins
A duct directs air towards the caliper for cooling while the vehicle is moving
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Disc contains many small holes for optimum cooling performance

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