Introduction to Drafting and Freehand Sketching

Comprehensive review flashcards covering drafting principles, tools, standard line weights, freehand sketching methods, geometric constructions, and lettering standards.

The three standard course forms required to be completed and handed in alongside assignments are the Cover Sheet, the Mark Sheet, and the __________.

Log Sheet

Drafting is defined as a graphic language that uses __________ rather than letters to convey technical information.

lines

Because all manufacturing industries utilize drafting to communicate designs to fabricators, drafting is referred to as the __________.

language of industry

Because drafting uses standardized symbols and conventions understood across the globe, it is called the __________.

universal language

For drafting on standard $8\frac{1}{2} \times 11\text{ inch}$ bond paper, a drawing board should have a working surface measuring approximately __________ wide by $24\text{ in (}610\,\text{mm}\text{)}$ high.

$$30\text{ in (}763\,\text{mm}\text{)}$$

For a right-handed drafter, the working edge of the drawing board is located on the __________ side.

left

The three primary functions of a T-square are aligning drawing paper, serving as a tool rest for set squares, and drawing __________ lines.

horizontal

A standard T-square consists of two main components: the head, which rides along the drawing board's working edge, and the __________, which provides the straight edge.

blade

Drafting pencil lead is composed of graphite, glue, and __________, where an increased proportion of this component produces harder lead.

clay

Initial light construction and layout lines are drawn with a __________ lead pencil, while final lines and lettering are completed with a softer 2H pencil.

6H

Translucent paper that allows light to pass through for producing inexpensive blueprint copies is known as drawing __________.

vellum

Lines drawn in any direction that remain an equal distance apart from one another are classified as __________ lines.

parallel

Two lines that intersect or meet at an angle of exactly $90^\circ$ are called __________ lines.

perpendicular

By combining a $30^\circ/60^\circ$ set square and a $45^\circ$ set square upon a T-square, a drafter can draw angles of $75^\circ$ and __________.

$$15^\circ$$

A __________ scale allows a drafter to represent objects larger than the paper sheet, whereas an enlarging scale depicts parts too tiny to view at actual size.

reducing

The scale type typically used in civil works such as highway design and mapmaking where distances span miles or hundreds of feet is the __________ scale.

engineer's

A thin metal plate featuring various precision cutout shapes used to isolate errors and protect surrounding linework during erasing is an __________.

erasing shield

When drawing circular arcs with a compass, the drafter should always __________ the compass in the direction of travel while pulling the lead.

lean

When executing straight lines with drafting instruments, the drafter must always __________ the pencil along the straightedge rather than pushing it.

pull

To maintain a uniform line weight and prevent one-sided tip wear, the drafter should slowly __________ the pencil while pulling it across the sheet.

rotate

Dimension lines, which feature arrowheads and are broken centrally for dimension values, are typically offset by __________ from the object outline.

$$10\,\text{mm}$$

An extension line starts roughly $2\,\text{mm}$ away from the object line without touching it and extends past the final dimension line by approximately __________.

$$3\,\text{mm}$$

Crosshatching lines used on cutaway views to indicate internal composition and material type, typically angled at $45^\circ$, are __________ lines.

section

Lines composed of short dashes used to show features obscured from a particular viewpoint in an orthographic projection are __________ lines.

hidden

The heaviest, thickest line found on an entire finished technical drawing sheet is the __________ line.

border

In the engineering design process, immediately after generating an idea, the second step is to produce a __________ on paper.

freehand sketch

The standard technique for freehand sketching straight lines is to draw a continuous series of connected __________ strokes.

short

To sketch a $30^\circ/60^\circ$ angle without instruments, draw a right angle, lay out 3 equal units along the vertical line, mark __________ equal units along the horizontal base, and join the endpoints.

5

When sketching an ellipse, the horizontal axis must have more units marked than the vertical axis (such as 6 units horizontally versus 3 units vertically) to prevent the bounding box from forming a __________.

square

A freehand-sketched hexagon is formed by establishing two horizontal lines and four inclined lines angled at __________ tangent to an initial circle.

$$60^\circ$$

The standardized lettering style used in drafting that consists exclusively of vertical, uppercase characters formed without retracing strokes is single stroke __________ lettering.

Commercial Gothic

The standard character height for drafting lettering, as well as the standard vertical spacing between lines of text, is __________.

$$3\,\text{mm}$$

When preparing a standard drawing sheet border, the outer margin lines are offset inward from the sheet edges by __________.

$$10\,\text{mm}$$

In the standard bottom title block layout, a vertical dividing line is marked $130\,\text{mm}$ from the inside border corner, followed by two equal sections each measuring __________ wide.

$$50\,\text{mm}$$