Deck 9: Flatness Tolerance

Question 1

The tolerance zone for a flatness tolerance is the space between two perpendicular planes.

Answer 1

False

Question 2

If a flatness tolerance is applied to a surface, the high and low points of the surface must be within the tolerance zone.

Answer 2

True

Question 3

What are the five conditions that apply where a flatness tolerance is applied to a planar surface?

Answer 3

Thwe following conditions apply:
1. The tolerance zone is the space between two parallel planes
2. The tolerance zone may be oriented to best fit the high and low points of the surface
3. All surface elements of the controlled surface must be within this zone
4. The distance between the parallel planes is equal to the flatness tolerance value
5. The tolerance zone extends across the length and width of the surface

Question 4

Explain how you can determine whether a flatness tolerance is applied to a planar surface or a feature of size.

Question 5

Wherever Rule #1 applies to a planar regular feature of size, a(n) ____________________ flatness deviation requirement exists for the derived median plane of the feature of size.

Question 6

A dial indicator, also known as a dial gage and probe indicator, is an instrument used to accurately measure small linear distances, and is frequently used in inspection of parts.

Question 7

Describe Rule #1's effects on flatness deviation of a surface.

Question 8

Where a flatness tolerance is applied to a surface that is associated with a size dimension, and Rule #1 applies to the size dimension, the flatness tolerance value must be more than the size tolerance.

Question 9

____________________ is the condition of a surface or a derived median plane having all of its elements in one plane.

Question 10

Define flatness tolerance.

Question 11

Two typical form deviations are waviness and ____________________.

Question 12

What are the four areas of requirements that should be looked at to determine if a flatness tolerance is a standard-compliant specification?

Question 13

A(n) ____________________ is an imperfect plane formed by the center points of all line segments bounded by the feature of size.

Question 14

If the limit of the flatness deviation provided by Rule #1 is sufficient for the function of the application, there is no need to specify a flatness tolerance.

Question 15

A(n) ____________________ is a solid, flat plate used as the main horizontal reference plane for precision inspection and tooling setup.