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J. N. Green's Metalwork Theory for G.C.E. & C.S.E.: A Technical Drawing Book PDF


J. N. Green Technical Drawing PDF Download




Technical drawing, also known as engineering drawing or drafting, is a detailed, precise diagram or plan that conveys information about how an object functions or is constructed. Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout. Together, such conventions constitute a visual language and help to ensure that the drawing is unambiguous and relatively easy to understand.


If you are interested in learning technical drawing, you may want to check out the books by J. N. Green, a renowned author and teacher of technical drawing. His books cover all the basic drawing techniques, rules, and styles, as well as provide plenty of practice exercises for different levels of difficulty. In this article, we will introduce you to his books and show you how to download them in PDF format.




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Technical Drawing Basics




Before we dive into J. N. Green's books, let's review some of the fundamentals of technical drawing.


What are the elements and conventions of technical drawing?




A technical drawing consists of several elements, such as:


  • Table: A table is a structured set of data made up of rows and columns. A table allows you to quickly and easily look up values that indicate some kind of connection between different types of data.



  • Cell: A cell is a unit of information in a table. Each cell is defined by a <td> tag.



  • Row: A row is a horizontal group of cells in a table. Each row starts with a <tr> tag and ends with a </tr> tag.



  • Column: A column is a vertical group of cells in a table.



  • Header: A header is a cell that describes the content of a row or column. A header cell is defined by a <th> tag.



  • Caption: A caption is a title or description for a table. A caption is defined by a <caption> tag.



Besides these elements, there are also some conventions that make technical drawings more consistent and clear, such as:


  • Scale: A scale is a ratio that shows how much an object has been reduced or enlarged on a drawing compared to its actual size.



  • Symbols: Symbols are graphical representations of objects, actions, or concepts that are commonly used in technical drawings.



  • Perspectives: Perspectives are Perspectives are ways of showing the three-dimensional shape and position of an object on a two-dimensional plane. There are different types of perspectives, such as isometric, oblique, and perspective.



  • Units of measurement: Units of measurement are standardized quantities that are used to express the size, length, weight, or capacity of an object or phenomenon. Some common units of measurement are meters, kilograms, liters, degrees, etc.



  • Notation systems: Notation systems are sets of symbols and rules that are used to represent information in a concise and unambiguous way. Some examples of notation systems are mathematical notation, chemical notation, musical notation, etc.



  • Visual styles: Visual styles are the choices of colors, fonts, shapes, lines, textures, and other graphical elements that are used to create a certain mood or impression in a technical drawing.



  • Page layout: Page layout is the arrangement of text, images, tables, and other elements on a page. Page layout affects the readability and attractiveness of a technical drawing.



What are the types and applications of technical drawing?




Technical drawing can be classified into different types according to the purpose and scope of the drawing. Some common types of technical drawing are:


  • Mechanical drawing: Mechanical drawing is the type of technical drawing that shows the design, structure, and function of mechanical devices and systems, such as machines, engines, vehicles, etc.



  • Electrical drawing: Electrical drawing is the type of technical drawing that shows the layout, wiring, and circuitry of electrical devices and systems, such as appliances, lighting, power supply, etc.



  • Civil drawing: Civil drawing is the type of technical drawing that shows the design, construction, and maintenance of civil engineering projects, such as buildings, bridges, roads, dams, etc.



  • Architectural drawing: Architectural drawing is the type of technical drawing that shows the design, style, and aesthetics of architectural projects, such as houses, offices, monuments, etc.



  • Piping and instrumentation drawing (P&ID): P&ID is the type of technical drawing that shows the flow and control of fluids and gases in industrial processes and plants.



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  • Design: Technical drawing is used to create and communicate new ideas and concepts for products, systems, or structures.



  • Manufacturing: Technical drawing is used to provide specifications and instructions for producing and assembling parts and components.



  • Maintenance: Technical drawing is used to identify and troubleshoot problems and defects in existing devices and systems.



  • Evaluation: Technical drawing is used to measure and compare the performance and quality of products, systems, or structures.



  • Educational: Technical drawing is used to teach and learn the principles and skills of engineering and technology.



What are the tools and software for technical drawing?




To create technical drawings, you need some tools and software that can help you draw accurately and efficiently. Some common tools and software are:


  • Drawing instruments: Drawing instruments are the physical tools that are used to draw lines, shapes, and symbols on a drawing surface. Some examples of drawing instruments are pencils, pens, rulers, compasses, protractors, etc.



  • Drawing paper: Drawing paper is the material that is used as the drawing surface. Drawing paper can have different sizes, formats, and qualities, depending on the type and purpose of the drawing.



  • Drawing board: Drawing board is the flat surface that supports the drawing paper and provides a stable and comfortable working area. Drawing boards can have different features, such as clamps, scales, angles, etc.



  • Drawing software: Drawing software is the computer program that allows you to create, edit, and print technical drawings on a digital device. Drawing software can have different functions, such as drawing tools, geometric shapes, layers, dimensions, annotations, etc. Some examples of drawing software are AutoCAD, SolidWorks, SketchUp, etc.



J. N. Green's Books on Technical Drawing




Now that we have covered some of the basics of technical drawing, let's take a look at the books by J. N. Green, one of the most popular and respected authors of technical drawing books.


Technical Drawing GCE and CSE




Technical Drawing GCE and CSE is a book that covers the syllabus of the General Certificate of Education (GCE) and the


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