GD&T test #2 questions well answered
to pass
1. On page 3.2 the drawing is defined with directly tolerance or plus/minus tolerances. What are
some things that are not clear or could lead to misinterpretations? Are the datums clear? -
correct answer ✔✔ if it is a locational application, and function dictates that the size and
location are integral and considered as only one variable, then zero tolerancing at LMC may be
considered. If it is properly applied it provides manufacturing the maximum tolerance for a
locational application
2. Understand comparison of position tolerance vs plus/minus tolerancing on page 3.3 - correct
answer ✔✔
3. What are the usual guidelines to consider when applying geometric tolerancing: - correct
answer ✔✔
4. Review geometric tolerancing applied to the hole bar - correct answer ✔✔
5. When do you use RFS, MMC and LMC? What about for press fit, clearance hole application
and locational application? - correct answer ✔✔ MMC- when feature is for clearance
applications
LMC- location requirements when the effect of the size tolerance on the hole also contributes to
the location
RFS- when the feature is used for location applications or when the size tolerance of the feature
has no relation to the location
6. What does RFS, MMC and LMC mean? How does it affect the tolerance zone? - correct
answer ✔✔
to pass
1. On page 3.2 the drawing is defined with directly tolerance or plus/minus tolerances. What are
some things that are not clear or could lead to misinterpretations? Are the datums clear? -
correct answer ✔✔ if it is a locational application, and function dictates that the size and
location are integral and considered as only one variable, then zero tolerancing at LMC may be
considered. If it is properly applied it provides manufacturing the maximum tolerance for a
locational application
2. Understand comparison of position tolerance vs plus/minus tolerancing on page 3.3 - correct
answer ✔✔
3. What are the usual guidelines to consider when applying geometric tolerancing: - correct
answer ✔✔
4. Review geometric tolerancing applied to the hole bar - correct answer ✔✔
5. When do you use RFS, MMC and LMC? What about for press fit, clearance hole application
and locational application? - correct answer ✔✔ MMC- when feature is for clearance
applications
LMC- location requirements when the effect of the size tolerance on the hole also contributes to
the location
RFS- when the feature is used for location applications or when the size tolerance of the feature
has no relation to the location
6. What does RFS, MMC and LMC mean? How does it affect the tolerance zone? - correct
answer ✔✔
