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LINE CONVENTIONS
TITLE BLOCKS
MULTIVIEW DRAWINGS
SCREW THREADS
DIMESIONING AND TOLERANCING
100
This thick continuous line represents all edges and surfaces of an object.
What is visible line?
100

Shows size variances not given in the drawing.

What is the tolerance block?

100

The view that shows the most detail.

What is the front view?

100

The bottom between the two ridges.

What is the root?

100

The term used to show the origin from which the location of features is established, (reference plane)

What a datum?

200
Thin lines without dashes with arrow on one end showing the size or location.
What is a dimension line?
200

It is the ratio of the part as drawn and the actual part.

What is the scale block?

200

What a viewer sees when looking at the object in a glass box. The object is unfolded so the top view is above the front view.

What is third angle projection?

200

The most important diameter of the thread.

What is the pitch diameter

200
Extreme maximum and minimum dimensions.
What is limits dimensioning?
300
Thin continuous line with an arrow on one end that is used to point to a feature or drawing area to which a local note applies.
What is leader line?
300

A system for showing any changes on a drawing.

What is the revision history block?

300
System where the portraying of an objects feature is put onto a 2D plane.
What is Orthographic Projection?
300

Thread that tightens in the counter clockwise direction.

What is a left hand thread?

300

.Type of tolerance that permits variation from the dimensional value in both directions.

What is a bilateral tolerance?

400
Thin continuous lines usually drawn at a 45 degree angle that indicate the surface of an object.
What is a section line?
400

This is used to specify an area of a large print, similar to what is used on a highway map.

What is zoning?

400

An inclined surface when looked at straight on not sideways looks smaller.

What is foreshortened?

400

The distance between one point on a screw thread to the same point on the next thread.

What is the pitch?

400
The targeted value indicated.
What is the basic size?
500

Thin line composed of long dashes with pairs of short dashes, primarily used to indicate alternate positions of moving parts, adjacent positions of related parts, or for repeated details.

What is a phantom line?

500
Acronym for commercial and government entity.
What is CAGE CODE?
500

Mental picturing of 2D and 3D shapes and objects.

Spatial visualization?

500

The three classes for an external thread.

What is 1A, 2A, and 3A?

500

A general term used for a commercial product to designate size. An example is a 2x4.

What is nominal size?