1. Describe at least two uses for pictorial drawings.
    1. Any two of:

                                                               i.      Architects use pictorial drawings to show what a finished building will look like.

                                                             ii.      Advertising agencies use pictorial drawings to display new products.

                                                            iii.      Pictorial drawing is often used in exploded views on production and assembly drawings to illustrate parts lists and to explain the operation of machines and equipment.

                                                           iv.      Most people use some form of pictorial sketches to help convey ideas that are hard to describe in words.

  1. Name three types of axonometric projection.
    1. Three types of axonometric projection are isometric, diametric, and trimetric.
  2. What are the three most common types of pictorial drawing?
    1. The three most common types of pictorial drawing are oblique, axonometric, and perspective.
  3. What do you call a line that is not parallel to any of the normal isometric axes?
    1. A line that is not parallel to any of the normal isometric axes is a nonisometric line.
  4. Is an isometric projection larger or smaller than an isometric drawing?
    1. An isometric projection is smaller than an isometric drawing.
  1. In what way can the grid and snap features in a CAD program help a drafter create an isometric drawing?
    1. You can use an isometric grid and snap to guide the isometric lines in a drawing.
  2. Name the three most common types of oblique drawings.
    1. The three most common types of oblique drawings are cavalier oblique, normal (or general) oblique, and cabinet oblique.
  3. In what way or ways is an oblique drawing different from an isometric drawing?
    1. Note: There is a mistake in the book for the first of these differences.

                                                               i.      In oblique, two axes are parallel to the picture plane. In isometric, each of the three axes are at an equal angle to the picture plane.

                                                             ii.      Usually, no distinction is made between oblique projection and oblique drawing.

                                                            iii.      Because oblique drawing can show one face of an object without distortion, it has a distinct advantage over isometric.

  1. When creating an oblique drawing, how should you place the object?
    1. Place the object so that:

                                                               i.      The irregular outline or contour faces the front.

                                                             ii.      The longest dimension is parallel to the picture plane.

  1. What is the difference between a cabinet drawing and a cavalier drawing?
    1. In a cavalier oblique the receding lines are drawn full length. In a cabinet oblique the receding lines are drawn one-half size.
  1. Which type of pictorial drawing is most natural in appearance?
    1. Perspective drawings are most natural in appearance.
  2. Which type of pictorial drawing is least natural in appearance?
    1. Oblique drawings are least natural in appearance.
  3. What is the vanishing point in a pictorial drawing?
    1. The vanishing point is where the receding axes converge.
  4. What two factors affect how an object looks in perspective?    
    1. The first is its distance from the viewer and the second is its position (angle) in relation to the viewer.
  1. What is another name for two-point perspective? Why is it sometimes called this?
    1. Two point perspective is also called angular perspective since none of the faces are drawn parallel to the picture plane.