Drawing 2 Flashcards
What is a freehand sketch?
A drawing made without measuring instruments, using only a pencil and eraser.
What are the benefits of a freehand sketch?
- Can be produced anywhere
- Minimal equipment needed
- Quickly illustrates information
- Improves communication between technical and non-technical people
What is orthographic projection?
The projection of a single view of a 3D object onto a drawing surface.
What are the two schemes for showing orthographic projection?
- First angle
- Third angle
How is the first angle projection defined?
The model view is drawn opposite the face being viewed.
How is the third angle projection defined?
The model view is drawn adjacent to the face being viewed.
What is an isometric drawing?
A 2D drawing that represents a 3D view, with width and depth angled back at 30 degrees.
What is the primary use of isometric drawings?
To illustrate what an end product will look like.
What is a section view?
A representation that shows internal features by slicing through an object.
What are cross-sectional views used for?
To portray a cutaway portion of an object, showing hidden components.
What information do detail drawings contain?
- Geometry
- Material
- Heat treatment requirements
- Surface texture
- Size tolerances
- Geometric tolerances
What is the purpose of a detail view?
To capture features of interest and display them in a removed view of greater scale.
What are assembly drawings?
Illustrations used to explain how multiple components fit together.
What features are typically excluded in assembly drawings?
Detailed dimensions.
What type of views may be included in assembly drawings?
Sectional views for internal assemblies.
What information may be included in an assembly drawing’s parts list?
- Item number
- Description
- Quantity
- Material
- Remarks
True or False: An isometric drawing can show internal details that are not visible from the outside.
False
Fill in the blank: A _______ view shows a cutaway portion of an object.
cross-sectional
What is the role of leader lines in assembly drawings?
To indicate external and internal parts.
What is the main goal of using orthographic projections?
To provide enough information for a craftsperson to repair, install, or create the item.
