Question

What are some older terms that older drawings use to indicate runout?

A) Radiality, concentricity
B) Tolerance, datum
C) Circularity, cylindricity
D) True position, profile

Answer 1

Correct choice would be (A) Radiality, concentricity

In older drawings or engineering specifications, terms such as “radiality” and “concentricity” were commonly used to indicate or describe aspects related to runout, especially concerning circular features or elements in mechanical drawings.

Answer 2

Older drawings often used the terms circularity and cylindricity to indicate runout, which refers to deviations from perfect circular features in manufacturing.

Step-by-step explanation:

The older terms used in older drawings to indicate runout are circularity and cylindricity. Runout is a term used in mechanical engineering to describe a situation where the surface of a rotating component, such as a shaft or a wheel, deviates from an ideal perfect circle or cylinder over its entire length. Circular runout deals with the variation of a feature in a single plane, while total runout checks both the amounts of variation of the surface as it turns about the datum axis, considering multiple planes or the entire surface.