Podcast
Questions and Answers
Which type of projection is used to show the overall shape and dimensions of an object?
Which type of projection is used to show the overall shape and dimensions of an object?
- Orthographic projection
- Oblique projection (correct)
- Perspective projection
- Cavalier projection
In oblique projection, the projection lines coming from the 3D object intersect the 2D image plane at an oblique angle.
In oblique projection, the projection lines coming from the 3D object intersect the 2D image plane at an oblique angle.
- False
- True (correct)
Which axis is drawn at an angle of 30°, 45° or 60° from the horizontal in cavalier projection?
Which axis is drawn at an angle of 30°, 45° or 60° from the horizontal in cavalier projection?
- Z-axis (correct)
- Y-axis
- X-axis
How many types of oblique projections are there?
How many types of oblique projections are there?
Which type of projection is mainly used for conceptual and illustrative purposes?
Which type of projection is mainly used for conceptual and illustrative purposes?
Which type of projection is used in technical drawings to show the overall shape and dimensions of an object?
Which type of projection is used in technical drawings to show the overall shape and dimensions of an object?
In oblique projection, the projection lines are parallel to one another but not perpendicular to the picture plane.
In oblique projection, the projection lines are parallel to one another but not perpendicular to the picture plane.
Which surface of the 3D object remains true to size in oblique projection?
Which surface of the 3D object remains true to size in oblique projection?
How many types of oblique projections are there?
How many types of oblique projections are there?
Which type of oblique projection is mainly used for conceptual and illustrative purposes?
Which type of oblique projection is mainly used for conceptual and illustrative purposes?
Oblique projection is when the projection lines coming from the 3D object intersect the 2D image plane at an ______ angle.
Oblique projection is when the projection lines coming from the 3D object intersect the 2D image plane at an ______ angle.
One surface of the 3D object remains true to size and has an angle of 90° between the two ______.
One surface of the 3D object remains true to size and has an angle of 90° between the two ______.
It is used in ______ drawings and shows the overall shape and dimensions of an object.
It is used in ______ drawings and shows the overall shape and dimensions of an object.
There are three types of ______ projections: Cavalier, Cabinet, and General.
There are three types of ______ projections: Cavalier, Cabinet, and General.
Cavalier projection is when one axis is horizontal (x), one axis is vertical (y) and the third axis (z) is drawn at an angle of 30°, 45° or 60° from the ______.
Cavalier projection is when one axis is horizontal (x), one axis is vertical (y) and the third axis (z) is drawn at an angle of 30°, 45° or 60° from the ______.
Oblique projection is when the projection lines coming from the 3D object intersect the 2D image plane at an ______ angle.
Oblique projection is when the projection lines coming from the 3D object intersect the 2D image plane at an ______ angle.
The projection lines are parallel to one another but not ______ to the picture plane.
The projection lines are parallel to one another but not ______ to the picture plane.
One surface of the 3D object remains true to size and has an angle of 90° between the two ______.
One surface of the 3D object remains true to size and has an angle of 90° between the two ______.
It is used in technical drawings and shows the overall shape and ______ of an object.
It is used in technical drawings and shows the overall shape and ______ of an object.
Cavalier projection is when one axis is horizontal (x), one axis is vertical (y) and the third axis (z) is drawn at an angle of 30°, 45° or 60° from the ______.
Cavalier projection is when one axis is horizontal (x), one axis is vertical (y) and the third axis (z) is drawn at an angle of 30°, 45° or 60° from the ______.
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Study Notes
Types of Projection
- Oblique Projection: The projection lines from the 3D object intersect the 2D image plane at an oblique angle.
- Cavalier Projection: One axis (z) is drawn at an angle of 30°, 45°, or 60° from the horizontal.
- Types of Oblique Projections: There are three types: Cavalier, Cabinet, and General.
Characteristics of Projections
- Technical Drawings: Used primarily in technical drawings to show the overall shape and dimensions of an object.
- Surface Representation: In oblique projections, one surface remains true to size and maintains a 90° angle between two axes.
- Parallel Projection Lines: In oblique projection, the projection lines are parallel to each other but not perpendicular to the picture plane.
Purpose of Projections
- Illustrative Purposes: Oblique projection is mainly used for conceptual and illustrative purposes while also conveying the overall shape and dimensions of an object.
Summary of Key Details
- Projection Angle: In oblique projection, the intersection with the image plane occurs at an oblique angle.
- Surface Integrity: One surface of the 3D object remains true to its dimensions in the projection.
- Technical Use: Essential in creating technical drawings that accurately reflect object dimensions and shapes.
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