Mastering Technical Drawing Concepts

1. Match the following terms with their definitions: (a) Orthographic Projection (b) Isometric Drawing (c) Sectional View (d) Dimensioning Techniques (e) Technical Drawing Standards

• (a) Orthographic Projection - A method of representing three-dimensional objects in two dimensions; (b) Isometric Drawing - A type of pictorial representation showing three dimensions in one view; (c) Sectional View - A drawing showing an object cut through to reveal internal features; (d) Dimensioning Techniques - Methods to indicate size and location of features; (e) Technical Drawing Standards - Established guidelines for creating technical drawings.

• (a) Orthographic Projection - A technique for creating 3D models in software;

• (c) Sectional View - A representation of an object from a top-down view.

• (b) Isometric Drawing - A method for drawing in perspective with vanishing points;

2. Which of the following is NOT a type of orthographic projection? (a) First-angle (b) Third-angle (c) Isometric (d) Oblique

• Perspective

• Plan

• Elevation

• c

3. In isometric drawing, how are the axes typically represented? (a) 90 degrees apart (b) 120 degrees apart (c) 45 degrees apart (d) 60 degrees apart

• (b) 120 degrees apart

• 30 degrees apart

• 75 degrees apart

• 180 degrees apart

4. What is the purpose of dimensioning in technical drawings?

• The purpose of dimensioning in technical drawings is to provide precise measurements and specifications for manufacturing and assembly.

• To provide color coding for different materials.

• To enhance the aesthetic appeal of the drawing.

• To indicate the type of drawing software used.

5. True or False: Sectional views are used to show internal features of an object.

• False

• Sectional views only show the exterior of an object.

• True

• Sectional views are not used in technical drawings.

6. Fill in the blank: The standard unit of measurement in technical drawing is __________.

• millimeters

• inches

• centimeters

• feet

7. Which of the following is a common dimensioning technique? (a) Chain dimensioning (b) Baseline dimensioning (c) Both (a) and (b) (d) None of the above

• Radial dimensioning

• Vertical dimensioning

• (c) Both (a) and (b)

• Circular dimensioning

8. True or False: Technical drawing standards are the same worldwide.

• Technical drawing standards are only different in Europe.

• False

• True

• All countries follow the same technical drawing guidelines.

9. What is the main advantage of using isometric drawings?

• They are easier to create than perspective drawings.

• They only show one side of an object clearly.

• They are primarily used for two-dimensional designs.

• They provide a clear and accurate representation of three-dimensional objects.

10. Match the following types of sectional views with their descriptions: (a) Full section (b) Half section (c) Offset section (d) Revolved section

• Full section - Only a quarter of the object shown;

• (a) Full section - Entire object cut in half; (b) Half section - Half object and half exterior; (c) Offset section - Non-straight cutting plane; (d) Revolved section - Cross-section of a feature revolved.

• Half section - Entire object shown with no cut;

• Offset section - Straight cutting plane through the object.