To draw a tangent to a circle from a given point outside the circle. Geometrical and mechanical engineering drawing caribbean advanced proficiency examination mayjune 2007 general comments there has been significant improvement in candidates performance in unit 2 this year. This book offers the best coverage of basic graphics principles and an unmatched set of fully machinable working drawings. Engineering drawing and sketching introduction one of the best ways to communicate ones ideas is through some form of picture or drawing. Textbook of engineering drawing, second edition xfiles. Finally slide the triangle back to the tangent position, and draw the tangent lines between the two points of tangency. May 12, 2020 if a disc stands on its edge on a flat surface it will touch the surface at one point. It shows specific drawing solutions to many geometric problems. Nov 23, 2010 the point where the line passes through the surface of the circle is called the point of tangency. Locate the center of the arc by making the radius on the perpendicular line. To draw an ogee shaped arc tangent between two parallel lines. A line drawn from the point of tangency to the centre of the disc is called a normal, and the tangent makes an.
Draw lines at distance equal to the radius of the arc parallel lines. However, it is very important that the drawing produced to be accurate and clear. Milnes technical drawing the graphic language pages 120 is technical drawing for you. Technical drawing problems series 1 9th edition by frederick e. Draw lines parallel to rn through the remaining points on line mo.
Waec syllabus for technical drawing 20202021 waecnigeria. If a disc stands on its edge on a flat surface it will touch the surface at one point. This video shows the application of tangency in real lifesubscribe for more videos. The following constructions show the methods of drawing tangents in various circumstances. There are also plenty of exercises to practise these principles. It is a language of communication between architects and engineers, usually to convey information about the object. The engineering drawing common to all engineering trades as per nsqf 1st semester is the outcome of the collective efforts of experts from field institutes of dgt champion itis for each of the sectors, and. Draw a circular arc of radius r tangent to two lines. Read a working or assembly drawing blueprint represent mechanical components in multiview orthographic representation create conceptual design sketches create assembly drawings limited. The bestselling technical drawing is now updated and better than ever, providing you with complete coverage of the drawing skills and information you need for a successful career in drafting. Sketching with the box this section contains a brief description of first and third angle projection and is based on the concept of visualizing and constructing multiple orthographic views of 3d objects through the use of a projection box. The purpose of this guide is to give you the basics of engineering sketching and drawing. Intro to technical drawing elevations technical drawing elevation details and materials in elevations each elevation should show the location of all the elements of the building rooflines, windows, doors, and indicate the siding and roof materials, dimensions of windows and doors, the roof pitch, details of the trim, etc.
Tangents points t draw perpendicular line from center c to given lines. Tangents points t draw perpendicular line from center c. A big nono for achieving great technical drawings is smudging the. This has become very necessary as several aspirants of the 20202021 waec examination have been trooping into our website for waec guide and asking us several other questions concerning the syllabus for waec technical drawing to help them prepare. Basic drawing skills geometric construction applied mathematics dimensioning skills multiview drawing threads and fasteners manufacturing processes design principles 12% 6% 17% % 18% 7% 17% 10% page 4 of 12 wri. The second is a drawing done with instruments, known as a final drawing. Construct a line perpendicular to line ab and through point t. Drawing is used to record objects and actions of everyday life in an easily recognizable manner. Pdf geometric and engineering drawing by ken morling book.
Create unique dimensional looks with this classic technique. Besides student ability, teaching strategy also plays a prominent role in enhancing students learning. This book on theory and procedure along with related exercises contains theoretical. Technical drawing is concerned mainly with using lines, circles, arcs etc. A drawing that displays technical information to the reader through specific visuals, directions, notes, etc a good technical drawing should be informative, clear, neat, unambiguous and not cluttered. This text provides an introduction to technical drawing and provides instruction to help students create 2d drawings by hand or by using computeraided drafting. Technical drawing problems series 1 by frederick e. Technical drawing, 2000, 734 pages, frederick ernest. In the fields of art, design and architecture the word sketching and drawing are used as synonyms although there is a subtle difference in the meanings of there words. Engineering drawing with worked examples maurice arthur.
Always clean your triangles and drawing board to keep the smudging to a minimum. Sketch final drawing artistic drawings convey an idea, feeling, mood or situation. The engineering drawing common to all engineering trades is one of the book developed by the core. Show full abstract memory, measuring, budgets and technical drawings. Pdf this book includes practice problems for engineering drawing. It provides technical detail, uptodate standards, realworld examples and clearly explained theory and techniques. Engineering drawing with worked examples 1 and 2 together provide a background course for technician students, but will be equally useful for any engineering drawing course. Intro to technical drawing elevations technical drawing elevation details and materials in elevations each elevation should show the location of all the elements of the building rooflines, windows, doors, and indicate the siding and roof materials, dimensions of windows. Technical drawing problems series 1 giesecke, frederick e. To apply the principles of tangency to drawing problems. Put the point of the compass at the center of the arc, set the compass for the radius of the arc, and. It also means a descriptive representation of a concept, thought or principal ideas. It does not require an understanding of its creator, only an understanding of technical drawings.
Drawing an arc tangent to a given point on the line steps given line ab and tangent point t. This has become very necessary as several aspirants of the 20202021 waec examination have been trooping into our website for waec guide and asking us several other questions concerning the syllabus for waec technical drawing to help them. Technical drawing examination scheme there will be three papers, papers1, 2 and 3 all of which must be taken. This authoritative book provides a clear and comprehensive introduction to technical drawing and provides instruction to help users create 2d drawings by hand or by using computeraided drafting. Technical drawing course overview course description this curriculum is designed to be used as a halfunit, 18week course. Mem09002b interpret technical drawing blackline design page 5 1st september 2014 version 2 aims of the competency unit. This work sets out to learn and assess the use students make of the knowledge acquired in technical drawing subjects when. When you have completed this unit of competency you will have developed the knowledge and skills to select the correct and interpret a technical drawing. Drafters work with designers, engineers and architects to translate their ideas and designs into technical drawings. This barcode number lets you verify that youre getting exactly the right version or edition of a. The two parallel lines intersect at c center of the arc.
The engineering drawing common to all engineering trades is one of the book developed by the core group members as per the nsqf syllabus. This book deals with the fundamentals of engineering drawing to begin with and the. Tech drawing is the oldest type of written expression. Download geometric and engineering drawing by ken morling the new edition of this successful text describes all the geometric instructions and engineering drawing information, likely to be needed by anyone preparing or interpreting drawings or designs. Focusing on the graphic aspects of engineering and industrial technology, technical drawing 4e integrates key coverage of design and visualization for. Draw a line mo at any convenient angle preferably an acute angle from point m. Mechanical drawing is the second of three books which together provide comprehensive coverage of all aspects of secondary school technical drawing syllabuses. Since 1927, major revisions were introduced in 1943, 1953, 1964 and 1972 when the contents of bs 308 engineering drawing practice was divided into three. However, candidates continue to display poor drawing skills and limited knowledge of iso standards and conventions. Geometric and engineering drawing by ken morling pdf free download. Nomograph numbers oblique drawing pictorial drawing points of tangency problems references and instructions rightside.
The first is a drawing done without instruments, known as a sketch. Technical drawing lends itself to be used as a foundation for enabling students to. Drawing just like photography is one of the basic forms of visual communication. If we were asked to construct a tangent, given only the point of tangency, we would use the method shown on page 24 of the textbook t. From m and along mo, cut off with a divider equal divisions say three of any convenient length. Technical drawing is an important basic communication tool in engineering drawing. Open the compass at the given radius r, follow steps above. This point is known as the point of tangency, as shown in fig. Papers 1 and 2 will be a composite paper to be taken at one sitting. Mem09002b interpret technical drawing topic 1 engineering drawings blackline design page 1st september 2014 version 2 1. Pdf geometric and engineering drawing by ken morling. The problem numbers and page numbers are given in the web for. Draw an arc of radius 20 mm tangent to two given lines inclined at a.
Both 9week modules contain topics which have given technical drawing its well deserved reference as a universal laneuage. Successful design requires people who can think creatively and work as a team. Today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. The intersection of these lines with line mn will divide the. May 15, 2020 today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. In the fields of art, design and architecture the word sketching and drawing are used as synonyms although. A point x is given outside the circle of any radius.
Technical drawing professionals, called drafters or draftspersons, create the blueprints, schematics and models which manufacturers and contractors use to construct the final building, civil project or product. The line is called the tangent line but is referred to mainly as the tangent. See more ideas about electrical symbols, electronic schematics and electrical diagram. The books are also suitable for craft level courses such as engineering and building related subjects and for industrial training courses where an understanding of. To draw a normal and tangent through a point 40mm from the directrix. Technical drawings represent the exact shape, dimensions and composition of an object. The problem numbers and page numbers are given in the web for edition. Engineering drawing course and in minimizing discrepancies prevailing. Hence, engineering drawing is called the universal language of engineers. With teri topes appliqu in reverse, intricate handappliqu designs are made fast and easy. Standardization is the process of formulating and applying rules for an orderly approach to a specific activity for the benefit and with the cooperation of all concerned, and in. The online version of this book will show colour figures where appropriate. Often it is necessary to draw the teeth on a pair of meshing gears, to understand the problems.
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