All of the following statements about brake drum measuring and condition are true EXCEPT:

A. if the highest and lowest measurements taken at any straight-line position across the drum vary by 0.006 inch or more, machine the drum to correct the problem.
B. the diameter measured at the deepest groove must be 0.030 inch (0.75 mm) or more under the discard dimension.
C. drums that are smooth and true but exceed the new diameter by 0.090 inch or more should be reused without turning.
D. even slightly rough drum surfaces should be turned to ensure a true drum surface.


Answer: C

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