Rk Dhawan Engineering Drawing Pdf 160
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A Textbook of Engineering Drawing by R.K. Dhawan: A Review
A Textbook of Engineering Drawing is a comprehensive book that covers the subject of engineering drawing as per AICTE. The book is written by R.K. Dhawan, a professor of mechanical engineering at Delhi College of Engineering. The book has three editions: the first one published in 2006, the second one in 2012, and the third one in 2019.
The book is divided into four sections: Section I deals with the basics of engineering drawing, such as scales, lettering, dimensioning, and geometrical constructions. Section II covers orthographic projections, including first angle and third angle projections, projection of points, lines, planes, and solids. Section III explains isometric projection, oblique projection, perspective projection, and freehand sketching. Section IV covers sectional views, auxiliary views, development of surfaces, intersection of solids, and assembly drawings.
The book is pedagogically strong and designed for easy learning. It contains close to 1300 figures and tables that illustrate the concepts and examples clearly. It also provides numerous solved problems and exercises for practice. The book is suitable for students of B.E./B.Tech., diploma courses, and AMIE courses.
The book is available in paperback format and can be purchased online from various websites. The book has received positive reviews from readers who have found it useful and informative. The book is a valuable resource for anyone who wants to learn engineering drawing in a systematic and simple way.Some of the benefits of having a perfect engineering drawing are[^1^] [^3^]:
It helps in the visualization of an architect or designer. The product that is in your mind can be shared with others by using the illustration.
It depicts the process of making an item, such as the steps, tools, and materials involved.
It shows the features, shape, and structure of an object in various views and projections.
It provides the reference material for constructing buildings, machines, and machine components.
It specifies the dimensions, tolerances, accuracy, finish, hardware, and material of an object.
It facilitates the use of CAD (Computer-Aided Design) software to create, modify, analyze, or optimize a design.
To make an engineering drawing, one needs to follow some steps[^2^]:
Plan the project by communicating with design teams, collecting planning documents, researching the project, and identifying product specifications and functions.
Establish project files by creating a file in a CAD program and inputting the item's specifications.
Create the product by using digital tools and menus to draw the basic shapes and symbols of the item.
Add details by using commands and functions to add dimensions, tolerances, annotations, colors, textures, etc.
Check for errors by using tools to verify the accuracy and validity of the drawing.
Save and export the drawing by choosing a suitable file format and location.
The instruments used in engineering drawing are[^4^]:
Drawing board: A flat board on which paper is placed for making drawings.
Drawing sheet: A paper sheet used for making drawings. It can be of different sizes and qualities.
Drawing pencil: A pencil used for making drawings. It can be of different grades and hardnesses.
Drawing pen: A pen used for making drawings. It can be of different types and colors.
Eraser: A tool used for erasing mistakes or unwanted marks on a drawing.
Ruler: A tool used for measuring or drawing straight lines on a drawing.
Compass: A tool used for drawing circles or arcs on a drawing.
Protractor: A tool used for measuring or drawing angles on a drawing.
Set square: A tool used for drawing perpendicular or parallel lines on a drawing.
French curve: A tool used for drawing smooth curves on a drawing. aa16f39245