DDT 164 Study Guide Test #3 Flashcards
Know the two methods of creating auxiliary views we used in class
1.Fold Line Method
2.Reference Plane Method
Auxiliary View
An orthographic view other than one of the six principle views.
Line of sight (LOS)
Direction of view. Perpendicular to projection plane, Parallel with
construction lines. Perpendicular to fold lines or reference lines.
Inclined Plane
a plane inclined at an angle to the horizontal
Inclined Plane
How many auxiliary views need to show the true size and shape?
How it looks in the primary views?
1
L,A,A
Primary Auxiliary View
View projected of one of the six principle views
Second Auxiliary View
View projected of a primary auxiliary view
Tertiary Auxiliary View
View projected of a secondary or another tertiary auxiliary view.
Partial Auxiliary View
rules associated with them
Only show the area that is true size and shape, Can use short break lines to separate it from the other part of drawing. Used to save time.
Oblique Surface
How many auxiliary views need to show the true size and shape?
How it looks in the primary views?
2
A,A,A
Dihedral Angles
Angle between two planes
Auxiliary View Classifications
1.Primary Auxiliary View
2.Secondary Auxiliary View
3.Tertiary Auxiliary View.
Primary Auxiliary View Classifications and descriptions of each (where projected from, and what dimension is shown in true length) (Be able to list)
- Depth Auxiliary View – Projected from Front View – Shows depth dimension in true length.
- Height Auxiliary View - Projected from Top View – Shows height dimension in true length
- Width Auxiliary View - Projected from Profile View – Shows width dimension in true length.
Auxiliary view Applications
- Reverse Construction
- True length of Line
- Point View of Line
- Edge View of Plane
- True Size of Plane
Three traditional methods used to solve spatial problems are:
- Direct View Method (Reference Plane Method)
- Fold Line Method
- Revolution Method
A __________ has no width, height, or depth
Point
A __________ is a geometric primitive that has no thickness, only length and direction
Line
Rule #1: - True Length of a Line
If a line is positioned __________ to the projection plane and the line of sight is __________ to that projection plane, then the line will appear as true length
Parallel
Perpendicular
Rule #2: - Point View of a Line
If the line of sight is __________ to a true length line, the line will appear as a __________ in the adjacent view. Corollary: Any adjacent view of a point view of a line will show the true length of a line.
Parallel
Point
View
Rule #3 - Planar Surface Views
Planar surfaces of any shape always appear either as __________ or as surfaces of __________ configuration
Edges
Similar
Rule #4 - Edge View of a Plane
If a line in a plane appears as a __________ the plane appears as an __________.
Point
Edge
Rule #5 - True- Size Plane
A true-size plane must be __________ to the line of sight and must appear as an __________ in all adjacent views.
Corollary: If a plane is true-size then all lines in the plane are true length and all angles are true.
Perpendicular
Edge
To find the Dihedral Angle between two intersecting planes you must create a view where
BOTH planes are in __________ view and where there intersecting line appears as a __________.
Edge
Point
A(n) __________ is a point or line where two geometric forms, such as line or surfaces, meet or cross each other.
Intersection
__________ is the clear and correct representation of the relative positions of two geometric figures in multiview drawings.
Visibility
The intersection of a line and a plane is referred to as the __________.
Piercing
Point
The intersection of two planes is a __________ all of whose points are common to both planes.
straight line
A __________ is the unfolded or unrolled flat or plane figure of a 3-D object.
Development
A __________ is a single curved surface that begins at a point called a pole and becomes larger as it travels in a plane around the origin.
spiral
A __________ is the curve generated by the motion of a point on the circumference of a circle as the circle is rolled along a straight line in a plane.
cycloid
A __________ is the spiral path of a point on a string unwinding from a line, circle or polygon.
involute
A __________ is the curve formed by a point moving uniformly at both an angular and linear rate around a cylinder or cone.
helix
A __________ surface is a flat, two dimensional bounded surface.
Planar
A __________ surface is generated by moving a straight line revolved around an axis or vertex.
Single-curved
A __________ surface is a surface generated by a curved line revolving around an axis (cannot be developed)
Double-curved
A __________surface is a single- or double curved transitional surface. (cannot be developed)
Warped
A __________ surface is a surface produced by the movement of a straight-line following a path to form a plane, single-curved surface or a warped surface.
Ruled
A single curved ruled surface can be developed.
A Torus is an example of a double-curved surface. (donut)
