DTL-1090 Technical Drawing 3
Test bank for DTL-1090 Technical Drawing 3
Terms in this set (53)
Orthographic Projection Planes
A method of representing three-dimensional objects on a plane having only length and width.
a drawing that shows an object as it appears to the human eye, includes isometric and perspective drawings
three dimensional drawing made up of equal angles of 120 degrees, most common 3-D drawing used in industry
three dimensional drawing where the front faces forward, and the depth dimensions go back at angles, usually 15, 30, or 45 degrees. Used when most information on drawing is on the front of the object.
three dimensional drawing that depth lines disappear to a vanishing point. Used mainly in architectural presentations
The distance from front to back on a pictorial drawing.
The relationship of one thing to another in size, amount, etc.
A horizontal or vertical line that can be used to locate entities in an adjacent view.
An imaginary surface on which the view of the object is projected and drawn.
SV Full Section view
Used to show the object as if one half of the object was removed.
SV Aligned Section View
A view in which the cutting plane is bent passing though selected features of the object and then removed to be on the original plane.
SV Broken-out Section View
Part of an existing drawing view, that is used to expose inner details of a model.
SV Thin features
Should not be section lined.
SV Hidden Lines
Are not drawn on section views
SV Half Section view
The section view which is usually limited to symmetrical objects. Shows the object as if one quarter of the object was removed.
SV An Assembly Section
Used to show the arrangement and relationship of parts that makeup an object. Section lining should be reversed or mirrored on adjoining parts.
SV A Pictorial Section
Used to show the arrangement and relationship of parts that makeup an object in a three dimensional view with a quarter to a half of the object removed.
SV Ribs, Webs, or Gear Teeth
Items should never be section lined, even though the cutting plane passes through the objects
SV Broken-out Section
The section view that does NOT use a cutting plane line and is limited by a break
SV Offset Section
Uses a cutting plane line that is NOT straight, and is offset or bending through the object.
SV Where mating surfaces meet in assembly drawings
a change is indicated in the direction of the section lines.
SV The cutting plane line
A thick Phantom Line
SV Circular objects
Are drawn using half sections where required.
SV Section Views are used to clarify:
Interior or hidden details on a multi-view drawing of an object.
SV A sectional view usually replaces
one of the principle views (top, front or side) but may also be an additional view or a series of supplemental views depending on the type.
SV "Section Lining" or "Cross Hatching" or "Hatching"
Lines on the Section view to distinguish the solid portions from the hollow areas of an object and can also be used to indicate the type of material that was used to make the object.
SV General Purpose "Section Lining", which is also used to represent "Cast Iron"
Lines are drawn at a 45° angle and spaced 1/8" apart.
SV Different materials
Have different patterns of lines and spacings.
AUX An Auxiliary View is Always Drawn:
Parallel to the Inclined Surface.
AUX Reference Line
A Line Used for Transferring Distances is Called a:
AUX Dihedral Angles
The Angle Between Two Planes is Called:
AUX Auxiliary Views are drawn:
To Show True Size and Shape.
AUX Hidden Lines
Are Seldom Drawn in Auxiliary Views.
AUX An Auxiliary View Projected rrom The Front View
Shows the Depth of the Object.
AUX When a Cylinder is Cut by an Inclined Plane
The Resulting Shape is Elliptical.
AUX "Developable Surface"
Surfaces That May Be Unfolded Or Unrolled To Lie Flat
AUX Auxiliary Views are take from an Orthographic view from a line of sight other than:
Top, front, right side, left side, bottom, or rear.
AUX Primary Auxiliary Views
Are projected onto a plane that is perpendicular to only one of the principal planes of projection and is inclined to the other two.
AUX Secondary Auxiliary Views
Are projected from primary auxiliary views.
AUX Partial auxiliary views used when:
The entire view is unnecessary and often is difficult to read.
AUX Partial auxiliary views should be connected to the view from which it is projected
by a centerline or reference line so that it does not appear lost and unrelated to the other views.
PIC Isometric Planes are:
Left (or Front), Top, & Right
PIC The isometric snap option:
allows you to create a grid that aligns itself with the isometric pictorial axes.
PIC In an isometric drawing circular features are represented by:
ellipses (or isocircles).
PIC An option within the ELLIPSE command:
PIC Isometric projection is a method for visually representing
three-dimensional objects in two dimensions in technical and engineering drawings.
PIC True measurements are made along three major axes, which are:
Vertical, 30° up to the Left, and 30°up to the Right
PIC In order to create an isometric circle to represent a hole through the top surface of a box:
the drafter must insure that the correct isoplane has been selected by scrolling through the isoplanes using the F5 key.
PIC Cabinet Oblique
When receding lines are drawn at half scale
PIC Cavalier Oblique
When receding lines are drawn at full scale
PIC When drawing Isometrics, convert angles to
PIC Oblique drawings are
Three-dimensional representations with a vertical face of the drawn object parallel to the picture plane.
PIC The Scale of an Oblique drawing is accurate
horizontally and vertically