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# Qamarul ed assignment

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### Qamarul ed assignment

1. 1. ‫بلقيهجفريﮐجروترأنﻣﮐتب‬ MAKTAB KEJURUTERAAN JEFRI BOLKIAH KUALA BELAIT NEGARA BRUNEI DARUSSALAM ASSIGNMENT 1 SESSION 2012/2014  Please Tick (  ) First Attempt:  Re-Do: TITLE: ENGINEERING DRAWING FUNDAMENTAL,GEOMETRICAL CONSTRUCTION, ORTHOGRAPHIC & PICTORIAL PROJECTIONS AND PATERN DEELOPMENTUNIT TITLE: ENGINEERING DRAWINGNAME/ID CARD NUMBER: QAMARUL ARIFIN BIN HAJI AFFANDY (01-072604)GROUP/LEVEL: Diploma Year 1 Marine Engineering (A)DATE GIVEN: 6 / 2 /2013 DATE SUBMITTED: 4 / 4 /2013QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 1
2. 2. TABLE OF CONTENTNo. Content Page1 Page cover 12 Table of Content 23 Introduction 34 Engineering drawing used 4 as a mean of communication5 Orthographic Projection 56 Types of Lines used 67 Pictorial Drawing 7-88 Conclusion 99 References 10QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 2
3. 3. INTRODUCTION ON ENGINEERING DRAWINGThis assignment was given to us by Sir Saini before the school holiday . Thisassignment sole purpose is to teach us on how to draw isometric projection ,oblique projection , perspective projection.An engineering drawing is a document that communicates a precise description ofa part. This description consists of pictures, words, numbers and symbols.Together, these elements communicate part information to all drawing users.Engineering drawings are often referred to as “blueprints” or “blue lines”. It isused to fully and clearly define requirements for engineered items and is usuallycreated in accordance with standardized conventions for layout, nomenclature,interpretation, appearance, size.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 3
4. 4. ENGINEERING DRAWING USED AS A MEAN OF COMMUNICATIONEngineering drawing is not only the province of the draftsperson. It is the languageof the engineer. It is their means of developing and recording their ideas, andconveying them to others.The best ways to communicate ones ideas is through some form of picture ordrawing. This is especially true for the engineer. Words are not the naturallanguage of engineers. Drawings are their prose, mathematics their grammar anddifferential equations their poetry.Engineering graphics is an essential course offered at an early stage in engineeringeducation and is used as a support in other courses.The details of construction or fabrication are conveyed with the help of drawingsshowing top view, front view , side view and sectional view which are required byarchitect etc.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 4
5. 5. ORTOGRAPHIC PROJECTIONOrthographic projection (or orthogonal projection) is a means of representing athree-dimensional object in two dimensions. It is a form of parallel projection,where all the projection lines are orthogonal to the projection plane,resulting inevery plane of the scene appearing in affine transformation on the viewingsurface. It is further divided into multiview orthographic projections andaxonometric projections.• FRONT VIEW• TOP VIEW• SIDE VIEW (left and/or right hand view)• BASE/SECTIONAL VIEWS First angle Third angle The plan is BELOW the front view.  The plan view is ABOVE the front view. The right-hand side view is on the left-  The right-hand side view is on the right- hand side of the front view. hand side of the front view. The left-hand side view is on the right-  The left-hand side view is on the left-hand hand side of the front view. side of the front view.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 5
6. 6. TYPES OF LINES USED IN ENGINEERING DRAWINGThe diagram below shows the types and thickness of lines used for variouspurposes. Each line is used for a definite purpose and it should not be used foranything else.Lines can also be classified by a letter classification in which each line is given aletter.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 6
7. 7. PICTORIAL DRAWINGPictorial sketches often are more readily made and more clearly understood thanare front, top, and side views of an object.Pictorial drawings provide a 3D image to help understand a drawingThe most common pictorial drawing is the Isometric drawing. The isometric viewprovides a likeness of the 3D object and should be drawn to provide as much detailas possible. The lengths of lines are generally the true length of the object.(Sometimes the view may be scaled)Perspective drawings provide the most accurate view of an object but themeasurements are not true lengths.Axonometric (planometric) views are often used on house plans to show roominteriors.(a) Isometric projection(b) Oblique projection(c) Perspective projection(d) Planometric projectionQAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 7
8. 8. ISOMETRIC PROJECTIONA trained eye and good imagination will be able to understand the threedimensions of an object. Several orthographic views on different planes are to bedrawn to understand fully an object. But in isometric projection, only one view ona plane is sufficient to represent an object in its realistic appearance. Anyone canunderstand by looking at a view what the job is by isometric projection.OBLIQUE PROJECTIONOblique projection may be illustrated in different ways, according to the choice ofaxes, length of inclined side and direction of looking the side. As compared withisometric projection, in oblique projection, one side of the object is horizontal,second side is vertical and the third side is inclined at 30Oor 45O to the horizontal.The lengths of the horizontal and vertical sides are equal to the actual lengths, butthe length of the inclined side is taken as three-fourth or half of the actual length.PERSPECTIVE PROJECTIONPerspective projection or perspective drawing is the representation of an objecton a plane surface, called the picture plane, as it would appear to the eye, whenviewed from a fixed position. It may also be defined as the figure formed on thepicture plane when visual rays from the eye to the object cut the picture plane.Perspective is mainly used in architecture. By means of perspective, thearchitecture is able to show how an object would appear when constructed.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 8
9. 9. CONCLUSIONWith my skills and what I have studied about engineering so far, I have finished allthe drawings given neat and clean. I also did research on the internet to look formore information about engineering drawing, I also seek help from my friends toassist me in my drawings so that there will no be any unforced error.QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 9
10. 10. REFERENCESINTRODUCTIONhttp://www2.ivcc.edu/perez/what_what_is_an_engineering_draw.htmlENGINEERING DRAWING USED AS A MEAN OF COMMUNICATIONhttp://edu-support.blogspot.com/2012/07/engineering-drawing-and-workshop.htmlhttp://civilengineer.webinfolist.com/graphics.htmORTHOGRAPHIC PROJECTIONhttp://engineeringtraining.tpub.com/14069/css/14069_162.htmTYPES OF LINES USEDhttp://edu-support.blogspot.com/2012/07/basic-engineering-drawing-conventions_09.htmlPICTORIAL DRAWINGhttp://encyclopedia2.thefreedictionary.com/Pictorial+drawinghttp://jaime123.edublogs.org/2011/08/23/pictorial-drawings/QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 10