All of the following statements are true EXCEPT:
A)drive shafts can be aluminum, steel, carbon fiber bonded to aluminum yokes, or composite that is pultruded over an aluminum tube.
B)most steel drive shafts are shorter than 60" to 65".
C)short steel shafts use a center support bearing.
D)aluminum drive shafts can be 85" to 90" because aluminum has a higher "critical speed."

Question

Quizplus · Accepted Answer

Drive shafts, especially longer ones, may use a center support bearing to help support the shaft and reduce vibrations, not specifically short steel shafts. The statement about short steel shafts using a center support bearing is not accurate as the use of a center support bearing is more related to the length and design requirements of the drive shaft assembly rather than the material it is made from or its length being specifically short.

All of the Following Statements Are True EXCEPT