Which of the following is not true regarding flatness?
A)It differs from straightness.
B)The term flatness is interchangeable with the term straightness.
C) When flatness is the feature control, a datum reference is neither required nor proper.
D) Flatness is specified when size tolerances alone are not sufficient to control the form and quality of the surface.

Question

Quizplus · Accepted Answer

Flatness and straightness are distinct geometric tolerances in technical drawing and manufacturing. Flatness refers to the condition of a surface being equally flat across its entire extent, while straightness pertains to a line or feature being straight. They are not interchangeable terms as they apply to different types of features.

Which of the Following Is Not True Regarding Flatness