Fillet radius notation When all fillets share the same size, it is acceptable to specify the fillet radii in a single general note (for example, “UNLESS OTHERWISE SPECIFIED, ALL INTERNAL FILLETS R = 3”).

Introduction / Context:
Drawings should be concise yet complete. When many identical features repeat, a general note communicates the requirement once, reduces clutter, and lowers the chance of inconsistency. Fillets are common repetitive features, so a general note is often the most efficient method to specify their radius.

Given Data / Assumptions:

• Multiple fillets on the part are intended to be the same size.
• Any exceptions will be individually called out.
• The drawing uses a recognized standard for notes and abbreviations.

Concept / Approach:
General notes broadcast requirements that apply broadly across the part, such as surface finish, unspecified radii/chamfers, and material treatments. By stating “ALL FILLETS R = X UNLESS OTHERWISE SPECIFIED,” the designer sets a default. Individual leaders are then used only for the exceptions, improving readability and reducing overdimensioning.

Step-by-Step Solution:

Verification / Alternative check:
Perform a design review to ensure the single radius meets strength, manufacturability, and assembly needs for all edges to which the note applies.

Why Other Options Are Wrong:
Saying “Incorrect” ignores accepted drafting practice. Limiting the method to architecture or prototypes is unfounded. Requiring separate leaders for every fillet creates unnecessary clutter.

Common Pitfalls:
Forgetting to override the note where a special radius is needed, ambiguous scope of the note, or mixing units.

Final Answer:
Correct