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Which constant velocity joint is used at the outer end of a driveshaft?

  • A.The tripod type, which uses three rollers running in a housing and also permits axial movement of the shaft
  • B.The Hooke joint
  • C.The Weiss joint, which uses two pairs of balls held in grooves and is now obsolete in automotive applications
  • D.The Rzeppa ball type

Answer: D

The Rzeppa joint uses six balls in a cage between an inner and outer race and accommodates the large angles that steering requires. The tripod inner joint permits the plunge that suspension movement demands. Each is used where its particular capability is needed. Naming what changes and what stays the same is the reliable route through questions of this shape. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Working one numerical case through both cases side by side fixes the distinction better than any rule of thumb.

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