Draw the projections of ab and show its inclinations with the h. The gsfc engineering drawing standards manual is the official source for the requirements and interpretations to be used in the development and presentation of engineering drawings and related documentation for the gsfc. Engineering drawing lecture 6 16082011 projection of points and 1 projection of lines indian institute of technology guwahati. Mar 14, 2017 projection of lines sh 12 engineering graphics f. Subject engineering graphics topic projection line projection lecture 24 faculty prabhat kumar prasad gate academy plus is an effort to initiate free online digital resources for the. Projection of points and lines it department, griet. Three orthographic views in firstangle projection are given in fig. Textbook of engineering drawing, second edition xfiles. While drawing this true shape keep one sideedge which is making inclination perpendicular to xy line similar to pair no. The name or title of the drawing is the name by which in this case the detail drawing is commonly referred to by many parties involved. An engineering drawing is a technical not artistic drawing which.
A line ef, 85mm long has its end e, 25mm above the hp and 20mm in front of the vp. In engineering drawing required lines are should be maintain maximum thickness. Line of sight 2 plane of projection image plane or picture plane the projection theory is used to graphically represent 3d objects on 2d media paper, computer screen. Download this pdf document so that you can access it anytime and print any page that you may want to use the following pages contain information and exercises about orthogonal orthographic drawing term used in victoria term used in new zealand isometric drawing they can be used for. In engineering drawing following four methods of projection are commonly used, these are. Kinds of projections the kinds of projections are connected with the relationship between the four elements of projection. A dimensioned drawing should provide all the information necessary for a finished product or part to be manufactured. Projections of straight lines ppt, engineering drawing. Correct usage of this alphabet of lines is essential whether you use traditional drafting methods or cad. If a client of yours is having difficulty visualizing a design, what type of drawing would be the easiest t engineering drawing multiple choice questions and answers pdf free download. Other parties may have an interest in design collaboration, procurement purchasing, costing, manufacturing, quality control, marketing, handling packaging. Chapter 4 orthographic projection and multiview constructions. Engineering graphics projection line projection lecture 24.
Thus, every drawing of an object will have four things on which projection depends. The extension line connects the dimension line on which the value of the measurement is placed to the reference points on the outline of the drawing. In drawing lines are with dark it is representing the actual image of drawing. Drawing section views middlesex county vocational and.
Line types and conventions for mechanical drawings are covered in ansi standard y14. Mar, 2020 an isometric view of a rectangular block is shown in fig. Engineering drawing lettering and lines presentation 1. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Engineering graphics projection of points, projection of lines slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This is known as the first angle orthographic projection. An orthographic projection drawing may consist of two or more views.
Download engineering drawing text book by nd bhatt pdf latest edition for b. Here you can download engineering drawing book by n. The following slides will help show the several methods or types of section views. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. One can pack a great deal of information into an isometric drawing. The end a is 12 mm in front of the vp and 15 mm above hp. Different views of an object can be drawn by projections. All the students and professional of civi,mechanical,electrical can use this app to learn the drawings of engineering. A straight line may have different orientations in space well be positioning.
This app also helpful for teachers,professors who teaches engineering subjects. Nov 27, 2017 a line ab, 65 mm long, has its end a 20 mm above the h. Complex technical drawings were made in renaissance times, such as the drawings of leonardo da vinci. Detail drawings seldom describe the intent of an engineering design. This projection planes serves the same purpose in technical drawing as is served by the movie screen. Pdf textbook of engineering drawing 2nd edition by k. Engineering drawing mostly asked mcq pdf part one for rrb. A rectangular prism 25mm30mm side and 50mm long is lying on the ground plane on one of its rectangular faces in such a way that one of its end face is parallel to and 10mm behind the picture plane. An engineering drawing is a type of technical drawing that is used to convey information about an object. Other parties may have an interest in design collaboration, procurement purchasing. Engineering drawing lecture 7 19082011 projection of lines and 2. Engineering drawing course and in minimizing discrepancies prevailing among the different teaching and training health institutions. A beginners guide to isometric projection with examples. The engineering technical drawings all in one app for engineers engineering drawing app for civil,mechanical,electrical engineers professionals.
This document is highly rated by mechanical engineering students and has been viewed 3270 times. It is the graphic language and called the universal language of engineers. A 3d projection or graphical projection maps points in threedimensions onto a twodimensional plane. A projection is a drawing or representation of an entity on an imaginary plane or planes. Both drawing types are used in technical drawing for communication. Engineering drawing mostly asked mcq pdf part one for rrb alptechnician cbt 2. True lengths and auxiliary views engineering drawing. Draw the projections of the line and find its true inclinations with the vp and the hp. A line ab, 65 mm long, has its end a 20 mm above the h. The first projection can be done along the line 12. As an engineering drawing display a precise picture of the object to be produced. Engineering drawing important questions pdf file ed imp qusts please find the attached pdf file of engineering drawing questions pdf ed imp qusts link ed question bank uniti construct an ellipse. The mechanical engineering branch, mechanical systems division, has.
Orthographic projections orthographic projections is a technical drawing in which different views of an object are projected on different reference planes observing perpendicular to respective reference plane. Mar 14, 2020 projections of straight lines ppt, engineering drawing, semester mechanical engineering notes edurev is made by best teachers of mechanical engineering. As graphics are usually displayed on twodimensional media such as paper and computer monitors, these projections are widely used, especially in engineering drawing, drafting, and computer graphics. Nov 03, 2014 engineering graphics projection of points, projection of lines slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Draw the projections of a line ab inclined to both hp and vp, whose true length and true inclinations and locations of one of the end points, saya are given. The projections of a straight line are obtained by joining the top and front views of. Orthographic projection technique can produce either 1. Engineering graphics tutorials online engineering free. Two projection lines indicate where the dimension starts and finishes. So do the construction accordingly and note the case carefully solve separately on drawing sheet giving names to various points as usual, as the case is important x y 300 600 read problem and answer following questions 1. Visit my youtube channelin the search bar write manas patnaikand there you will find tons of stuff covering almost every aspect in engineering drawing.
The drawing shows its name, wall bracket within the title block. Engineering drawing text book by nd bhatt pdf latest edition. When the distance of the focus from the directrix is equal to 60 mm and eccentricity 23. Engineering drawing app technical,civil,mechanical apps on. The front view of the cube, therefore, represents its isometric projection. Crossing of extension lines shall be avoided whenever possible. Engineering drawing, most commonly referred to as engineering graphics, is the art of manipulation of designs of a variety of components, especially those related to engineering. Using the construction line command in autocad to draw. Engineering graphics projection of points and lines. Engineering drawing practice for schools 81 colleges bureau ofindianstandards manak bhavan, 9 bahadur shah zafar marg new delhi 12. The plane of projection is perpendicular to this line.
Fundamentals of drafting first angle orthographic projection. Projection of straight lines in engineering graphics pdf. Projection of straight lines in engineering graphics pdf in engineering drawing practice two principal planes are used to get the. Continuous thick lines are used to indicate visible outlines. Here we are providing mostly asked mcq pdf of engineering drawing for rrb alptechnician cbt 2 stage exam,it will be provide help to aspirants who are going to appear this exam. D interpret information on detail drawings of engineering components. Dimensioning identification purpose this section aims to enable the student to extend their knowledge of drawing interpretation from engineering drawings produced to as1100 standard.
Engineering drawing important questions pdf file ed imp. In this drawing, it is assumed that the object is at infinity. Lines on an engineering drawing signify more than just the geometry of the object and it is. It primarily consists of sketching the actual component, for example, a machine, with its exact dimensions. Axonometric drawing that show all three dimensions of an object in one view. It shows the correct shape and the exact dimensions necessary to manufacture the object. The bureau of indian standards has prescribed the types of lines in its code is107141983 to be used for making a general engineering drawing.
A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The corners of the block are used to position a line df in space. Slide set 1 alphabet of lines and precedence of lines. Theory of projection pdf free download as pdf file.
Objectives at the end of this section you should be able to. Theory of projection pdf line geometry perspective graphical. The following statements will help you understand orthographic projection drawings. Modern engineering drawing, with its precise conventions of orthographic projection and scale, arose in france at a time when the industrial revolution was in its infancy. If the isometric drawing can show all details and all dimensions on one drawing, it is ideal. The shape of an object is seen in actual size in such drawing. Here you can download materials of engineering drawing pdf notes ed pdf notes with latest and old materials with different links.
This is such a type of drawing in which parallel projection is used for the preparation of the drawing of an object these lines are perpendicular to the plane. The use of a right type of line results in a correct drawing. Draw the projections of the following straight lines. A straight line is the shortest distance between two points.
Bng 101 engineering graphics slide set 1 alphabet of lines and precedence of lines. Orthographic projection of points, lines, planes and solids. May 17, 2017 visit my youtube channelin the search bar write manas patnaikand there you will find tons of stuff covering almost every aspect in engineering drawing. Engineering drawing app technical,civil,mechanical for. Engineering drawing pdf notes ed pdf notes smartzworld. Line of sight 2 plane of projection image plane or picture plane the projection theory is used to graphically represent 3. The actual object that the drawing or projection represents.
The central plane is 60mm away from the axis of the prism towards. Doehdbk1016193 engineering symbology, prints, and drawings overview the department of energy fundamentals handbook entitled engineering symbology, prints, and drawings was prepared as an information resource for personnel who are responsible for the operation of the departments nuclear facilities. Section 11 general principles of dimensioning on technical drawings. An engineering design is usually defined by many individual detail drawings which combine to form an assembly drawing. The top and front views of the line have lengths of 55mm and 70mm respectively. Line use in an orthographic projection fill the following dotted orthographic projection with the appropriate line types. Object in the first quadrant opening out the horizontal plane chapter 2. Table 1 shows the types and thickness of lines used for various purposes. Support me pursue my passion of creating great quality videos on engineering. Engineering drawing text book by nd bhatt pdf latest.
The name and or drawing number of the assembly drawing in which the detail drawing is called up or used on is stated in the title block. The cut line is called a cutting plane, and can be done in several ways. Orthographic projections indian institute of technology. Engineering drawing is completely different from artistic. Engineering drawing pdf book free download agrimoon. The alphabet of lines in technical drawing lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. There should be a small gap between the outline of the drawing and a projection line. Each type of line has a very precise symbolic meaning. Parallel projection is a type of projection where the line of sight or projectors are parallel and are perpendicular to the picture planes. An example of an oblique projection drawing definition of an oblique projection a way of drawing which a threedimensional object is represented by a drawing in which the face, usually parallel to the picture plane, is represented in accurate or exact proportion, and all other faces are shown at any convenient angle other than 90 typically 45. An orthographic projection drawing is an important part of the engineering process. Importance of engineering drawings engineering drawing is a two dimensional representation of a threeation of a threedimensional dimensional object.
Multiview drawing that each view show an object in two dimensions. If you continue browsing the site, you agree to the use of cookies on this website. Usually, a number of drawings are necessary to completely specify even a. The line measures 80 mm long and inclined at an angle of 300 to. Dimensions are always drawn using continuous thin lines. Oct 24, 2016 a straight line 55 mm long makes an angle of 30 deg to the hp and 45 deg to the vp.
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