GD&T Profile Tolerancing Applications 3

Question 1

A composite profile tolerance uses two segments in the feature control frame. What does the upper segment control?

Accepted Answer

Location of the pattern relative to the datums

Answer

In a composite profile tolerance, the upper segment (PLTZF) controls the location of the entire pattern relative to the datum reference frame.

Question 2

For a composite profile tolerance, the lower segment feature-relating tolerance zone framework (FRTZF) primarily controls:

Accepted Answer

The relationship of features within the pattern to each other

Answer

The FRTZF (lower segment) controls the feature-to-feature relationship within the pattern, ensuring features are correctly spaced relative to one another.

Question 3

Which statement is TRUE about Profile of a Line vs. Profile of a Surface?

Accepted Answer

Profile of a line controls individual cross-sectional elements; profile of a surface controls the entire surface

Answer

Profile of a line controls each individual cross-sectional line element of a surface, while profile of a surface controls the entire surface simultaneously.

Question 4

When specifying a non-uniform profile tolerance using ASME Y14.5-2018, which notation is used?

Accepted Answer

NON-UNI placed before the tolerance value in the feature control frame

Answer

ASME Y14.5-2018 introduced the NON-UNI modifier placed before the tolerance value to indicate a non-uniform profile tolerance zone.

Question 5

A profile of a surface callout with a tolerance of 0.5 and datums A and B means the surface must lie between two boundaries how far apart?

Accepted Answer

0.5 mm apart (0.25 each side for bilateral)

Answer

A bilateral profile tolerance of 0.5 creates a zone 0.5 mm wide total, with boundaries 0.25 mm on each side of the true profile.

(GD&T) Geometric Dimensioning and Tolerancing Certification Practice Test

(GD&T) Geometric Dimensioning and Tolerancing Certification Practice Test

GD&T Profile Tolerancing Applications 3