Question

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16. 17. - are considered theoretically perfect planes, surfaces, points, lines, or axes that measurements are made from. a) Datum features b) Datums c) Datum feature simulators d) Simulated datums can be machine tables, surface plates, gage surfaces, surface tables, or specially designed rotation devices. a) Datum features b) Datums c) Datum feature simulators d) Simulated datums

Answer 1

16. Datums are considered theoretically perfect planes, surfaces, points, lines or axes that measurements are made from.

17. Datum features can be machine tables, surface plates, gage surfaces, surface tables, or specially designed rotating devices.

18. The Datum reference frame is the three datum features selected based on their importance to the design of the part.

19. Datum feature symbols are placed in the view where the surface appears as an Edge.

20. Two or more cylindrical features that share the same axis are said to be Coaxial.

21. Two or more surfaces on the same plane are said to be Coplanar.

22. The datum feature symbol placed on the edge view of a surface indicates a datum surface.

23. The datum feature symbol placed on the extension line from a surface and offset from the dimension line arrowhead indicates Datum Surfaces.

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