Unit 2 Flashcards
in its antique
form, a kind of multipurpose desk which can be used for any type of drawing, writing or
impromptu sketching on a large sheet of paper or for reading a large format book or
other oversized document or for drafting precise technical illustrations.
Drafting Table/ board
both ends of the board were cleats-known as
Working edge
is a tool shaped like a letter T, and that is used to draw parallel lines and right
angles. It used as a guide in making horizontal
lines and to provide an edge against which the triangles. When making horizontal lines,
the direction should be from left to right (if right-handed) and right to left (if left-handed).
Technically, the rule is called the blade attached to one end, and the cross piece is
known as the head. These parts are the “working edge,” which worked on the drawing
table/board.
T-Square
Parts of T-square?
Head
Working edge
Blade
Types of T-Square Head?
Fixed Tsquare
Adjustable Tsquare
Detachable Tsquare
They are made of plastic and usually transparent to show the other side
of the drawing. _______ used in combination with the T-square for making vertical
lines and respective angles.
Triangles
Triangle 📐 degree?
45°×45°×90°
30°×60°×90°
the essential tool of a draftsman. The hexagonal shape is
ergonomically designed to fit the thumb, forefinger and the second finger and to prevent
them from rolling off the table
Pencil
What type of clay is the pencil lead made of?
Kaolin
What is the meaning of the number labelled in the pencil? 1, 2 and 3
1 is the softest
2 is the medium
3 is the hardest
Classification of pencil according to groups
- Hard from 4H to 9H
- Medium from B to 3H
- Soft from 2B to 7B
Is used to re-point a pencil when it becomes dull. It is made up of a
small thin piece of wood with a beautiful piece of sandpaper pasted on it.
Sanding pad/ pencil pointer
used in attaching drawing paper on the drawing table
Fastener
used to reproduce the dimensions of an object to full size on the drawing to
enlarge or reduce them to some regular proportions.
Scale
Mostly used by Mechanical Engineers
Mechanical scale
is a semicircular instrument for measuring and constructing angles (The
Grolier International Dictionary: 1981). The scale divided into 180 equal parts, each of
which is called degree (°).
Protractor
Is an object, typically a piece of soft rubber or plastic used to rub out
something written
Eraser
is a thin sheet of celluloid or steel. It contains varied shapes of holes
which make it possible to protect neighbouring lines when erasing by fitting the exact
way of the opening to the form of the mistake. It made of tempered spring steel which
will resist wear and tear and springs back flat after being bent.
Erasing shield
made of fine animal hair which used to remove or brush way rubber
crumbs and loose dirt particles that collect on a drawing
Dusting Brush
composed of finely ground carbon in suspension with natural or synthetic
gum added to make the suspension mixture waterproof.
Drawing ink
are used to hold the speedball pens and other lettering pens while
making a freehand drawing.
Penholder and p
Penpoints
is a thin, translucent material commonly called “vellum.” It is a
transparent paper upon which copies or tracing of drawing made to reproduce them by
blueprint or by other similar processes.
Tracing Paper
are layman’s name for compasses.
Case Instruments
