parallelism is another name for rotor: select one: a. end play. b. thickness variation. c. side play. d…

Brief Explanations:

In the context of rotors, parallelism refers to the even - ness or lack of runout. Runout is related to how true a rotating part is, and parallelism is a measure of the consistency in the position of the rotor's surfaces during rotation. End - play, thickness variation, and side - play are different types of tolerances and movements not related to parallelism in the same way as runout.

Answer:

d. runout