ICT 7

• Masking Tape - this is used for fastening the drawing paper on the drawing table.
• Drawing Paper - This type does not groove easily when pressure is applied to the pencil.
• Sharpener - pencils should be sharp whenever they show sign of dullness.
• Eraser - This is used to clean the dirt off the drawing
• Drawing Pencils - this is one of the most important tools in drawing
• Soft Pencils - are too soft to be used in mechanical drafting
• Medium Pencils - are used for general purpose work in drawing
• Erasing Shield - this tool is made up of metal with irregular holes
• Triangular Scale - this is a tool generally used when producing a drawing in an enlarged or reduced form to some regular proportion.
• T-Square - it is a drawing instrument used when making horizontal lines
• Fixed Head - the head is fastened to the blade, it is used for ordinary work.
• Movable head or Adjustable head - it is designed for comfort when carrying the t-square
• Triangle - it is a three-sided ruler, which typically has two equal sides meeting at a 90 degrees angle.
• Compass - this drawing instrument is used when drawing arcs or circles, it is used in a similar way to a divider.
• Divider - it can easily transfer accurate measurements by adjusting the divider points.
• Protractor - it is a semi-circular instrument divided into 180 equal parts, each of which is called a degree.
• Line symbols used in technical drawing are often referred to as ALPHABET OF LINES.
• The Alphabet of Lines is a list of line symbols that engineers use in technical drawings to communicate specific shapes, sizes, or surfaces.
• Object or Visible Lines - which dark line to show outline of object, visible edges and surfaces.
• Construction Lines - very light and thin line use to construct layout work.
• Dimension Line - thin and dark lines use to show the size (span) of an object with a numeric value.
• Hidden Line - short dash lines use to show non-visible surfaces, shows a s medium thickness.
• Centre Line - long and short dash lines, usually indicates center of holes, circles, and arcs. Line is thin and dark.
• Extension Line - thin and dark line use to show the starting and ending of a dimension.
• Cutting Plane Line - extra think line use to show cutaway views or plane of projection where a section view is taken, arrow indicates direction of view.
• Short and Long Break Lines - short and long medium line use to show cutaway view of a long section.
• Leader Line - medium line with arrowhead to show notes or label for size or special information about a feature.
• Phantom Line - long line followed by two short dashes use to show alternate position of a moving part.
• Section Line - medium lines drawn at 45 degrees use to show interior view of solid areas of cutting plane line.
• Line is the most basic design 'tool' on which almost every piece of of art relies. A line has length, width tone and texture.
• Orthographic Projection is a method of representing the exact shape of the object by dropping two or more perpendicular to a plane generally at a right angle.
• Two methods of share representation: Orthographic Views and Pictorial Views
• The Three Regular Views: Top View, Front View, Side View
• The Six Principle Views: Top View, Front View, Right Side View, Left Side View, Rear View, Bottom View
• Pictorial View - is a representation of a complete shape of the object.
• StereoLithography A 3D printing file format created by 3D Systems for its stereolithography system.
• •G-code (geometric code) is the most common CNC (computer numerical control) programming language used to drive computer-controlled manufacturing machines.
• Digital tools can be software, programs, or applications utilized through a computer, laptop, cellular phone, or other information and communication technology (ICT). 
• The Software is basically a set of instructions or commands that tell a computer what to do.
• A program is a set of instructions that a computer follows in order to perform a particular task.