Automobile Engineering in ME
Which one of the following statements correctly describes the construction of a planetary gear type differential?

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.
The six planetary pinions rotate in constant mesh with the internal gears.

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Automobile Engineering in ME
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Makes the steering more responsive
Allows the steering wheel to be turned by a greater amount when steering
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
Reduces the amount of kickback for large steering angles

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