GD&T Form and Orientation Tolerances 2

Question 1

Which GD&T symbol is used to control the straightness of a surface element (line element) on a cylindrical part?

Accepted Answer

Straightness (⏤)

Answer

Flatness (⏥)

Answer

Circularity (○)

Answer

Cylindricity (⌀)

Question 2

A flatness tolerance zone is defined as the space between two:

Accepted Answer

Parallel planes

Answer

Concentric cylinders

Answer

Parallel lines

Answer

Coaxial spheres

Question 3

When angularity is applied to a surface, what is the shape of the tolerance zone?

Accepted Answer

Two parallel planes at the specified angle to the datum

Answer

A cylinder at the specified angle

Answer

A cone at the specified angle

Answer

Two parallel lines at the specified angle

Question 4

Cylindricity differs from circularity in that cylindricity controls:

Accepted Answer

Both the roundness and straightness of the entire surface simultaneously

Answer

Only cross-sectional roundness

Answer

The axis orientation only

Answer

The diameter variation only

Question 5

Which statement about form tolerances and datums is correct?

Accepted Answer

Form tolerances never reference datums

Answer

Form tolerances always require at least one datum reference

Answer

Flatness requires a datum but circularity does not

Answer

Straightness always requires a datum axis

Question 6

A perpendicularity callout on a pin's axis controls the orientation of the pin's derived median line relative to:

Accepted Answer

A referenced datum plane or axis

Answer

Its own surface

Answer

The part's largest feature

Answer

Any convenient reference

Question 7

Under ASME Y14.5, the circularity (roundness) tolerance value must be:

Accepted Answer

Less than or equal to the size tolerance

Answer

Greater than the size tolerance

Answer

Equal to the cylindricity tolerance

Answer

Independent of the size tolerance