Technical Bridging Course
Learning Methods
Drawing Equipment
- Introduction
- Drawing Equipment
- Drawing paper and its application
- Drawing board and its application
- T-Square
- Set squares or triangles and their application
- Masking tape
- Pencils and their application
- Eraser (rubber)
- Erasing shield
- Adjustable compass or large bowl and its application
- Sandpaper pad or file
- Dust cloth or brushOther instruments
- Scale rulers (metric)
- Essentials do’s and don’ts of neatness in drawing
Application of the alphabet of lines
- Introduction
- Application of the alphabet of lines Adding linear dimensions
- Outlines or object lines (line type A)
- Centre lines (line type G1)
- Dimension lines (line type B2)
- Extension lines for dimensions (line type B3)
- Leader lines (line type B4)
- Construction lines (line type BB1)
- Projection lines (line type B)
- Guide lines (line type BB2)
- Dashed lines to show hidden details (hidden detail lines – line type E and F)
- Hatched lines or section lines (line type B5)
- Other lines
Lettering, figuring and dimensioning
- Introduction
- Lettering figuring and dimensioning in drawing
- Preparation of the drawing sheet
- Lettering and figuring
- Positions of the title and scale relative to each other
- Positioning of the title and scale on the drawing sheet
- Dimensioning on a working drawing
- Different types of dimensions on a working drawing
- Tolerance dimensions
- Dimensioning keyways
- Leaders
- Machining symbols
Freehand sketching
- Introduction
- Real-life (field) sketching and design sketching
- Freehand sketching
- Sketching horizontal lines
- Sketching vertical lines
- Sketching slanted lines
- Sketching curved figures and geometric shapes
- Sketching irregular shapes
- Isometric sketching
- Oblique sketching
Constructions
- Introduction
- Geometrical constructions
- Bisecting lines and angles
- Perpendiculars
- Parallel lines
- Setting out angles with the aid of set squares
- Hexagons (Six-sided figures)
- Octagons (Eight-sided figures)
- Joining straight lines with arcs using a compass
- An ellipse
Layout of drawings
- Introduction
- Layout of drawings
- First-angle orthographic projection
- Third-angle orthographic projection
- Projecting a third view
- Drawing step-method for laying out drawings
- Isometric drawings
- Oblique drawings
- Projections of prisms and pyramids
- Developments
- Interpenetrations
Sectioning
- Introduction
- Sectioning
- Terminology
- Sectional cutting planes
- Various aspects of sectioning
- How to draw a sectional view
- Sectional detail drawings
Conventional representations
- Introduction
- Holes and fasteners
- Representation of a drilled hole
- Representation of a tapped hole (threaded hole)
- Construction of a hexagonal nut
- Representation of a hexagonal head bolt
- Representation of a stud
- Representation of a stud assembly
- Springs
- Representation of springs
- Breaks
- Welded joints
- Types of welded joints
- Supplementary symbols
Fasteners
- Introduction
- Types of threaded fasteners
- Bolt heads
- Screw heads
- Locking devices
- Riveted joints
- Single or double rivet joints
Assembly drawings
- Introduction
- Hatching sectional drawings
- Sections of sectional drawings
- A typical assembly drawing
- Item numbers
- Parts list
- How to start an assembly drawing
Pipe drawings (chemical)
- Introduction
- Kinds of piping
- Pipe joints and fittings
- Pipe drawings
- Pipe drawing symbols