Hands-On AutoCAD LT ©2005

Chapter 4: Pictorial Representations

Perspective Projections

1.
In perspective projections, the projection lines
A)are parallel to the viewing plane.
B)are perpendicular to the viewing plane.
C)meet on the horizon line.
D)are drawn at 120° angles to one another.
2.
The most common type of perspective projection for showing architectural and civil projects is
A)one-point perspective.
B)two-point perspective.
C)three-point perspective.
D)four-point perspective.
3.
The advantage of perspective drawings over other types of pictorial drawings is that perspective drawings
A)allow measurement of true distances.
B)are faster and easier to draw than other types of pictorials.
C)present all sides of the objects equally.
D)most closely match the view of a human eye.
4.
The type of perspective projection in which one face of the object lies parallel to the viewing plane is
A)one-point perspective.
B)two-point perspective.
C)three-point perspective.
D)four-point perspective.
5.
The point at which projection lines converge in a perspective projection is known as the
A)horizon line.
B)ground line.
C)line of convergence.
D)vanishing point.
6.
To create a two-point perspective drawing in AutoCAD LT®, you must first
A)use the LINE command with Ortho to create the horizon line.
B)use the POINT command to establish the right and left vanishing points.
C)block in the front view of the object.
D)use the Perspective option of the LINE command to establish the right and left vanishing points.
7.
To ensure that all the lines converge exactly at the vanishing point, you should use the
A)Perpendicular object snap.
B)Endpoint object snap.
C)Node object snap.
D)Perspective object snap.
8.
The type of perspective projection in which none of the principal edges of an object are parallel to the viewing plane is
A)one-point perspective.
B)two-point perspective.
C)three-point perspective.
D)four-point perspective.
9.
Three-point perspective drawings are
A)commonly used for structural engineering jobs.
B)commonly used for interior designs to show a realistic view.
C)seldom used because they have little advantage over two-point perspectives.
D)generally preferred over one- and two-point perspectives.
10.
One of the last steps in creating any type of perspective projection in AutoCAD LT® is to
A)verify the horizon line.
B)trim away the excess portions of the projection lines.
C)establish the length of the object along the projection lines.
D)erase the back surface of the object.
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