Identifying tolerance presentation Which type of tolerance presentation explicitly lists the maximum and minimum permissible sizes of a feature, thereby identifying both size limits on the drawing?

Introduction / Context:
Size tolerances can be presented in several ways. One common method is to show the upper and lower permissible sizes directly on the drawing, enabling quick inspection of parts without additional calculations.

Given Data / Assumptions:

• The question focuses on size limits (maximum and minimum sizes).
• We are not addressing geometric controls but size-only representation.
• Standard drafting practices include limit dimensions and plus/minus tolerances.

Concept / Approach:
Limit dimensioning shows two numbers: the largest allowable size (max) and the smallest allowable size (min). By contrast, GD&T primarily deals with form, orientation, location, and runout controls; reference dimensions are informational only; allowance is a single intended minimum clearance or maximum interference, not a bilateral set of limits.

Step-by-Step Solution:

Verification / Alternative check:
Convert a plus/minus tolerance to limits to verify equivalence. For example, 10.00 ± 0.05 corresponds to 10.05 / 9.95 limits.

Why Other Options Are Wrong:

• GD&T: Addresses geometry, not direct size limits in the sense of two explicit numbers.
• Reference: Not for inspection; carries no tolerance.
• Allowance: A single design target for fit, not a pair of max/min limits.

Common Pitfalls:
Mixing reference dimensions with limit dimensions can confuse inspectors. Ensure that inspection uses only toleranced or limit-noted values.

Final Answer:
Limits