A Text Book on Engineering Graphics - Central Board of Secondary ...

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ii A text book on Engineering Graphics, Class XII. PRICE : Rs. FIRST EDITION 2010 CBSE, India COPIES: PUBLISHED BY : The Secretary, Central Board of Secondary Education, Shiksha Kendra, 2, Community Centre, Preet Vihar, Delhi-110092 DESIGN, LAYOUT : Multi Graphics, 5745/81, Reghar Pura, Karol Bagh, New Delhi-110005, Phone : 25783846 PRINTED BY : "This book or part thereof may not be reproduced by any person or agency in any manner."
Foreword Design is an integral aspect of the world around us. Every day, we are inundated with images of current generation products such as automobiles, air crafts, and so on. Design is crucial to each of these products. Engineering Graphics is the language of communication for all engineers, architects, interior decorators, apparel designers and many others. This is needed right from conceiving the design of any product, upto the mass production stage and beyond for modification and restructuring of Engineering Graphics finds its use in all fields work relating to various products and their design. As a first attempt, CBSE has prepared the text book for Class XI in Engineering Graphics which has been published in June, 2010. Through Class XI text book you have already gained an insight into the fundamentals of the subject Engineering Graphics. In this book for class XII, you will learn about the representation of objects, such as simple geometrical solids, simple machine blocks, in three dimension form i.e. Isometric Projections of solids. You will also begin to look afresh at the nature and function of several ordinary household engineering hardware such as nuts, bolts, screws, washers, rivets etc. that are essential to make a household run. In addition, you will learn to assemble the various simple machine blocks correctly in order to form a functional machine of appropriate use for household purposes or for industry. I would like to place on record my deep appreciation for all the subject experts and practicing teachers who have put in their sincere efforts in the development of this textbook. Appreciation is also due to Shri Shashi Bhushan, Director (Academics) & Dr. (Smt.) Srijata Das, Education Officer for planning and execution of the work and bringing out this publication. It is hoped that students and teachers will benefit by making the best use of these text books. Suggestions from the users for further improvement of these textbooks will be highly appreciated. VINEET JOSHI CHAIRMAN
Page 1: A Text Boo
Page 5: PREAMBLE THE CONSTITUTION OF INDIA
Page 9 and 10: CHAPTER 1 1.1 INTRODUCTION The obje
Page 11 and 12: ISOMETRIC PROJECTION 1.2.2 POSITION
Page 13 and 14: ISOMETRIC PROJECTION B C 30 (i) 5 b
Page 15 and 16: ISOMETRIC PROJECTION Example 4 : So
Page 17 and 18: ISOMETRIC PROJECTION Steps (i) Draw
Page 19 and 20: ISOMETRIC PROJECTION Steps (i) Draw
Page 21 and 22: ISOMETRIC PROJECTION Solution : Exa
Page 23 and 24: ISOMETRIC PROJECTION Example 14: So
Page 25 and 26: ISOMETRIC PROJECTION b o B 30 m a H
Page 27 and 28: ISOMETRIC PROJECTION Example 20 : S
Page 29 and 30: ISOMETRIC PROJECTION Example 23 : S
Page 31 and 32: ISOMETRIC PROJECTION 1.3.5 SPHERES
Page 33 and 34: ISOMETRIC PROJECTION 5. Draw an iso
Page 35 and 36: ISOMETRIC PROJECTION Steps: 1. Draw
Page 39 and 40: ISOMETRIC PROJECTION Steps: Exmple
Page 45 and 46: ISOMETRIC PROJECTION 7. BELOW: CIRC
Page 47 and 48: ISOMETRIC PROJECTION 30 66 30 15. B
Page 49 and 50: MACHINE DRAWING Fig 2.1 b : Screw t
Page 51 and 52: MACHINE DRAWING (v) RIGHT HAND AND
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MACHINE DRAWING 2.4 STANDARD PROFIL
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MACHINE DRAWING 2.4.2 METRIC THREAD
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MACHINE DRAWING Steps involved are
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MACHINE DRAWING 2.5 BOLTS In day to
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MACHINE DRAWING (vii) The end of th
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MACHINE DRAWING 2.5.3 T-BOLT Exampl
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MACHINE DRAWING Steps Involved Exer
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MACHINE DRAWING Example 10 : Soluti
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MACHINE DRAWING 2.6.2 SQUARE NUTS E
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MACHINE DRAWING Solution : Steps In
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MACHINE DRAWING Steps Involved Exam
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MACHINE DRAWING Example 15: Solutio
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MACHINE DRAWING 2.10 INTRODUCTION F
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MACHINE DRAWING 2.11.3CONVENTIONAL
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MACHINE DRAWING Exercises NOTE: Ass
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MACHINE DRAWING 2.15.1.3 DOUBLE HEA
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3 CHAPTER All of you have seen a bi
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BEARINGS 3. Plummer Block or Pedest
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BEARINGS Answer of Fig. 3.3 10 20 2
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BEARINGS Question: The figure given
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BEARINGS R5 R6 2 HOLES FOR BOLTS 24
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A BEARINGS Answer of fig 3.12 20 40
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BEARINGS NOTE : As per our syllabus
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BEARINGS Question: The figure given
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BEARINGS EXPLODED VIEW OF A FOOT ST
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BEARINGS 5 15 15 40 15 15 ENGINEERI
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BEARINGS FOOT STEP BEARING Ø 120
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ROD JOINTS DIMENSIONS OF A COTTER:
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ROD JOINTS SLEEVE AND COTTER JOINT:
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ROD JOINTS Solution of fig : 4.5 Qu
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ROD JOINTS Answer of fig. 4.9 50 50
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ROD JOINTS Question: The details of
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ROD JOINTS Exercise: The three view
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ROD JOINTS KNUCKLE JOINT OR PIN JOI
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ROD JOINTS Question: fig 4.19(a) sh
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ROD JOINTS Question: The figure 4.2
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ROD JOINTS Exercises: The three vie
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ROD JOINTS Dimensions of a Gib and
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ROD JOINTS 96 66 12 GIB 26 COTTER T
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ROD JOINTS Exercise: The two views
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5 CHAPTER Machines use various part
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TIE-ROD AND PIPE JOINTS (We have di
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TIE-ROD AND PIPE JOINTS Example 2:
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TIE-ROD AND PIPE JOINTS RH SIDE VIE
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TIE-ROD AND PIPE JOINTS 5.2.1.1 FEA
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TIE-ROD AND PIPE JOINTS (1) FLANGE
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TIE-ROD AND PIPE JOINTS Let us cons
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TIE-ROD AND PIPE JOINTS WHAT HAVE W
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SHAFT COUPLINGS 6.1 FLANGE COUPLING
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SHAFT COUPLINGS It can also be noti
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SHAFT COUPLINGS Ø100 Ø75 Ø50 Ø2
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SHAFT COUPLINGS Exercise 6.1 Fig 6.
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SHAFT COUPLINGS ASSEMBLED PICTORIAL
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SHAFT COUPLINGS Let us take another
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SHAFT COUPLINGS Exercise 6.2 1. FIG
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CHAPTER 7 7.1 INTRODUCTION PULLEYS
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PULLEYS So pulley is a simple machi
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PULLEYS Solution : Ø144 Ø126 Ø11
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PULLEYS Example 3 : Draw the Front
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