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Intro To Engineering Design - 2
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Intro To Engineering Design - 2
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1. A circled number identifying each part shown in an assembly drawing. Also called a ball tag or bubble number.

2. A system of dimensioning which requires all numerals - figures - and notes to be aligned with the dimension lines so that they may be read from the bottom (for horizontal dimensions) and from the right side (for vertical dimensions).

3. A conical- shaped recess around a hole - often used to receive a tapered screw.

4. A rectangular coordinate system created by three mutually perpendicular coordinate axes - commonly labeled X - Y - and Z.

5. A small angled surface formed between two surfaces.

6. A tolerance in which variation is permitted in both directions from the specified dimension.

7. The total permissible variation in a size or location dimension.

8. A part of design brief that challenges the designer - describes what a design solution should do without describing how to solve the problem - and identifies the degree to which the solution must be executed.

9. System of dimensioning in which all dimensions are placed from a datum and not from feature to feature. Also referred to as Datum Dimensioning.

10. 1. A triangle located round a polygon such as a circle. 2 To draw a figure around another - touching it at points but not cutting it.

11. Lines that are used to represent the material through which a cut is made in order to show an interior sectional view.

12. A number value - or algebraic equation that is used to control the size or location of a geometric figure.

13. The decimal measuring system based on the meter - liter - and gram as units of length - capacity - and weight or mass.

14. A dimension - usually without a tolerance - used for information purposes only. A reference is a repeat of a given dimension or established from other values shown on a drawing. Reference dimensions are enclosed in ( ) on the drawing.

15. Also referred to as the U.S. Customary system. The measuring system based on the foot - second - and pound as units of length - time - and weight or mass.

16. A CAD modeling method that uses parameters to define the size and geometry of features and to create relationships between features. Changing a parameter value updates all related features of the model at once.

17. A theoretically exact point - axis - or plane derived from the true geometric counterpart of a specific datum feature. The origin from which the location - or geometric characteristic of a part feature - is established.

18. A line drawn on a view where a cut was made in order to define the location of the imaginary section plane.

19. A group of values that is used to analyze the distribution of data.

20. The variables by which an object can move. In assemblies - an object floating free in space with no constraints to another object can be moved along three axes of translation and around three axes of rotation. Such a body is said to have six degrees

21. A shallow recess like a counterbore - used to provide a good bearing surface for a fastener.

22. Lines that are thin and used to connect a specific note to a feature.

23. Constant - non - numerical relationships between the parts of a geometric figure. Examples include parallelism - perpendicularity - and concentricity.

24. A line used to show the alternate positions of an object or matching part without interfering with the main drawing.

25. A cylindrical recess around a hole - usually to receive a bolt head or nut.