GD&T Profile Tolerancing Applications 2

Question 1

When a profile of a surface tolerance is applied to a curved surface, what does the tolerance zone consist of?

Accepted Answer

Two boundaries equally disposed about the true profile surface

Answer

Two parallel planes offset from the true profile

Answer

A cylindrical zone centered on the nominal surface

Answer

A unilateral zone offset entirely outside the true profile

Question 2

Which GD&T symbol is used for Profile of a Line?

Accepted Answer

A semicircle open at the bottom

Answer

A circle with a line through it

Answer

Two parallel horizontal lines

Answer

A circle with a cross inside

Question 3

A profile tolerance applied 'all around' a part feature is indicated by:

Accepted Answer

A circle placed at the junction of the leader line and the feature control frame

Answer

A note ALL AROUND in the feature control frame

Answer

A flag symbol at the end of the leader line

Answer

Brackets enclosing the entire feature control frame

Question 4

What is the primary difference between a bilateral and unilateral profile tolerance zone?

Accepted Answer

Bilateral distributes the tolerance equally on both sides; unilateral places it entirely on one side of the true profile

Answer

Bilateral applies to surfaces; unilateral applies to lines only

Answer

Bilateral requires a datum; unilateral does not

Answer

Bilateral uses tighter tolerances than unilateral

Question 5

When profile of a surface is used without a datum reference, it controls:

Accepted Answer

Only the form (shape) of the surface

Answer

Location and orientation of the surface

Answer

Only the size of the surface

Answer

Runout of the surface

Question 6

The 'all over' application of a profile tolerance means the tolerance applies:

Accepted Answer

To all surfaces of the entire 3D part

Answer

Around the entire perimeter of one cross-section

Answer

Only to the top and bottom surfaces

Answer

To surfaces visible in the front view only

Question 7

In GD&T, a profile tolerance that references three datums (A, B, C) controls which combination of characteristics?

Accepted Answer

Form, orientation, and location

Answer

Form and size only

Answer

Form only

Answer

Orientation and size only