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CADD-1 Lesson 9
Isometrics, Sectional Views, and Plotting
| Question | Answer |
|---|---|
| Isometric Drawing | A 2 -dimensional drawing technique that resembles 3 dimensions. |
| Angle of horizontals | 30 degrees |
| Linetype that is not generally shown in an Isometric Drawing | Hidden |
| In an Isometric drawing, verticals are drawn how? | In their normal vertical position |
| What are the three Isoplanes? | Right, left, and top. |
| Are centerlines ever shown in an Isometric drawing? | Yes, to locate dimensions. |
| Secondary operation used to adjust extension lines in an isometric drawing. | Oblique. |
| To represent a circle accurately, which command should you use? | ELLIPSE command and the Isocircle option. |
| Which function key allows you to toggle Isoplanes? | F5. |
| What is the main purpose of an isometric drawing. | Visualization. |
| What is the main purpose of a Sectional View? | To show internal details as clearly as possible. |
| How is a sectional view made? | By passing an imaginary Cutting Plane thru an object. |
| What linetype is the cutting plane drawn with? | Phantom |
| What command is used to draw the Cutting Plane? | PLINE with a .03 width. |
| What linetypes are generally not shown in a section view? | Hidden. |
| What are Cross-Sectional Lines? | Lines that represent the material where a part has been cut. |
| What command is used to create cross-sectional lines? | HATCH |
| What command allows you to change an existing hatched object? | HATCHEDIT |
| What is the relationship between the cutting plane and the line of sight? | They are perpendicular to each other. |
| Size of an A-size sheet? | 11,8.5 |
| What is a Full Section? | Developed when a cutting plane passes completely thru an object, and half of the part is removed. |
| What is a Half Section? | Developed when a cutting plane passes halfway thru an object and a quarter of the part is removed. |
| What is the size of a B-size sheet? | 17,11. |
| What is the size of a C-size sheet? | 22,17. |
| What is the size of a D-size sheet? | 34,22. |
| In AutoCAD, what determines the scale of the plot? | The Limits and the sheet size to be printed on. |
| After printing a drawing, what should you always do? | Evaluate your work thoroughly for mistakes. |
| What is the size of a E-size sheet? | 44,34. |
| Conventional Break Lines | Used to recuce the length or size of a drawing so it will fit the sheet size. |