IED Unit 2 Assessment

The measurement associated with an object's top-to-bottom dimension is known as height.

The measurement associated with an object's side-to-side dimension is known as width.

The most common views used in a three view, orthographic drawing are front, top, and right side. These views provide a comprehensive representation of an object by showing its front, top, and right side views. This allows for a complete understanding of the object's shape, dimensions, and features from different angles.

Label A is pointing to the vanishing point. In perspective drawing, the vanishing point is the point on the horizon line where parallel lines appear to converge. It is used to create the illusion of depth and distance in a two-dimensional drawing.

The measurement associated with an object's front-to-back dimension is known as depth. This refers to the distance from the front of an object to its back. Width refers to the measurement of an object from side to side, height refers to the measurement from top to bottom, and volume refers to the amount of space occupied by an object.

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A drawing which contains views of an object projected onto two or more orthographic planes is called a multi-view drawing. This type of drawing provides a comprehensive representation of the object from different angles and perspectives, allowing for a complete understanding of its shape, size, and proportions. It is commonly used in engineering and technical fields to communicate design ideas and specifications effectively.

The line labeled C is a construction line. Construction lines are used in technical drawings to help with the layout and construction of objects. They are typically light and drawn with dashed or dotted lines to distinguish them from other types of lines. Construction lines are not part of the final drawing and are often used as guides for creating accurate proportions and angles.

A cabinet oblique pictorial is a type of oblique pictorial where the depth is represented as half scale but the width and height are full scale. In this type of drawing, the object is shown at an angle, typically 45 degrees, and the depth is reduced to half its actual size while the width and height remain true to scale. This type of pictorial is often used in technical drawings to provide a clear representation of an object's dimensions and proportions.

A cavalier pictorial is an oblique pictorial where all dimensions are full scale. In this type of pictorial, the object is represented in a way that shows all three dimensions (length, width, and height) at their true scale. This means that the object appears as it would in real life, without any distortion or foreshortening. The other options, cabinet pictorial, perspective sketch, and isometric sketch, all involve some degree of distortion or foreshortening in their representation of the object.

Figure 4 is a two-point perspective because it shows a scene where two vanishing points are present on the horizon line. In two-point perspective, objects appear to recede into the distance towards two different points on the horizon, creating a sense of depth and dimension. The other figures may show different perspectives or only have one vanishing point, making them not two-point perspectives.

An orthographic projection is a method of representing 3-D objects on a plane by using multiple 2-D views, typically front, top, and side views. This technique allows for accurate measurements and proportions of the object to be shown, as it eliminates the distortion that can occur in perspective sketches or oblique sketches. Therefore, an orthographic projection is the appropriate method for representing 3-D objects on a plane with only width and height.

Hatch marks or section lines in an orthographic drawing are used to indicate the material of the object being depicted. These lines are typically drawn at a 45-degree angle and help to differentiate between different materials or parts within the drawing. By using different hatch patterns or line styles, the drafter can convey information about the materials that will be used in the construction of the object. This can be important for manufacturing and construction purposes, as it helps to ensure that the correct materials are used in the fabrication process.

Line type B is labeled as an "object line" because it represents the visible edges or outlines of an object in a drawing or diagram. It is used to define the shape, size, and boundaries of the object being represented. This line type is commonly used in technical drawings, architectural plans, and engineering diagrams to provide clear and accurate representations of objects. The other options, such as construction line, horizon line, and vanishing line, do not accurately describe the purpose or use of line type B.