ENGR 1182 Midterm I_ someone else as well

If an arc is equal to or greater than ____ degrees, center lines and center marks should be used.

180

Working Drawing Packets Includes

Assembly Drawings Assembly of parts (parts already fit together) Exploded assembly (show how parts fit together) •Detail drawings of non-standard parts •Bill of Materials

Two types of dimensioning? And which one is preferred

Chain and baseline (preferred)

Formal Drawing

Detailed multi-view representations of a finished part Includes: - Detailed orthographic views - Isometric view of part - Dimensions - Tite block

Dimensions should be located inside the boundaries of the object and placed between views whenever possible. (T/F)

False

Assembly Drawings

Fully assembled object is shown with all required pieces - Multi-view drawing

Through hole vs blind hole

Goes all the way through vs goes partially through an object

Half Section Views

Half of the interior is visible by cutting out a part of the object The section view shows both the exterior and interior

_________________________, which are denoted as equally spaced dashed lines on a drawing, represent the edges of an object or its features that cannot be seen on the real object but would be visible if the object were partially transparent.

Hidden lines

Full Section Views

Object is cut completely in half by a cutting plane perpendicular to the viewing plane This will show the full interior of the part

Title Block Components

Part name, Scale, Units, Author, Date, any other necessary info

Section View Drawings (Definition and Components)

Views of parts with cutouts to show inner details Components: 1. Cutting plane line 2. Viewing Direction 3. Cutout View (Section A-A)

When creating corner views of simple objects, lines are included ____ of surfaces.

at corners

When sketching arcs and circles, use lightly sketched square _________________________to define the limits of the curved entities.

bounding boxes

____, represented by alternating short and long dashes, cannot be seen on the real object, but they must be included on the drawing to identify where the center of the circular hole is located on the object.

centerlines

Circles appear as _____ in isometric sketches

ellipses

The simplest section view is the ____.

full section

Objects such as engineered parts can usually be fully defined when they are viewed through a set of viewing planes that together form a(n) ____.

glass box

One of the main incentives for using section views is to reduce the use of ____.

hidden lines

One way of visualizing a half section is to imagine a part that is cut such that ____ of it is removed to reveal the interior detail.

one-quarter

When creating an isometric sketch, make sure you show ____ of the surface in question.

only the visible part

In ____ projection, the image of an object is composed of points projected from individual points on the object onto the viewing plane such that the projection of each point is perpendicular to the viewing plane.

orthogonal

Although there are no defined rules as to which views must be included or excluded in a formal engineering drawing, there is a preferred configuration—the front, top, and ____ views.

right-side

How many standard or principal views are there?

six

With the isometric method, the axes are projected onto the paper as if you were looking down ____.

the diagonal of a cube.

Coded Plans

• Coded plans define simple objects which can be made from blocks. • Each number represents how tall the stack of blocks is at that location.

Orthographic Projections

• Hidden lines show features that are not visible from that view • Multiple views of an object determine where to include hidden lines in orthographic drawings

Isometric Sketches

• Isometric sketches represent 3D objects in 2D space. • They are made as if you are looking down the diagonal of a cube.