Correct option is A
A given dimension 50.3 ± 0.05 mm means the actual dimension can vary within:
· Upper limit = 50.3 + 0.05 = 50.35 mm
· Lower limit = 50.3 - 0.05 = 50.25 mm
This represents limiting dimensions, which define the maximum and minimum permissible sizes of a part within which the manufactured component must lie.
· Limiting dimensions ensure proper function and interchangeability in manufacturing and assembly processes.
· This type of tolerance is called bilateral tolerance, as the variation is applied both above and below the nominal size.
