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

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Example 8: Solution: A (iv) Join the visible edges by thick lines and axis by center line. ISOMETRIC PROJECTION (v) Complete the isometric projection with dimensioning and direction of viewing. 30 B O HELPING FIGURE B O F ISOMETRIC PROJECTION Fig 1.9 A Pentagonal prism of base side of 25 mm and axis length of 55 mm is resting on its face with its axis parallel to both H.P and V.P. Draw its isometric projection. Refer fig 1.10 25 HELPING FIGURE B O A A 65 30 30º O ISOMETRIC PROJECTION Fig 1.10 10 ENGINEERING GRAPHICS 25 30º B C 30º 30º 55 A C F
ISOMETRIC PROJECTION Steps (i) Draw the helping figure of pentagon with iso 25 mm length as one of its base edge in H.P. (ii) Draw the isometric box with OA on the horizontal line parallel to the direction of viewing, OB on the vertical line and OC equal to iso 55 mm on another horizontal line. (iii) Complete the isometric projection of pentagonal prism in this isometric box by the same step discussed in earlier examples. 1.3.2 PYRAMIDS Example 9: Solution : Pyramids are the solids with a base and slant triangular faces. These faces meet at a point called apex of the pyramid. In pyramids if they are kept on their base then they are called upright / vertical pyramids but if they are kept on their vertex on H.P. then they are called inverted pyramids. Let us draw some examples. Draw the isometric projection of a pentagonal pyramid of base side 30 mm and axis of 60 mm resting on its base on H.P. with one of its base side parallel to V.P. and nearer to the observer. Refer Fig. 1.11 Steps (i) Draw the pentagon with iso 30 mm and one of its base edge parallel to V.P. and nearer to the observer. Example 10: (ii) Complete the helping view figure by enclosing rectangle and center lines of pentagon. (iii) Copy the dimensions of helping figure i.e. OA and OB on the horizontal line as shown and draw the center lines of Pentagon in it. (iv) Draw the vertical axis in upright position from the center of pentagon equal to iso 60 mm. (v) Join the visible edges, starting from the vertex to base corners by thick lines. (vi) Complete the isometric projection of pentagonal pyramid with direction of viewing and dimensioning. Draw the isometric projection of an inverted pentagonal pyramid of base side 30 mm and axis of 60 mm resting on its base on H.P. with one of its base side parallel to V.P. and nearer to the observer. ENGINEERING GRAPHICS 11
Page 1 and 2: A Text Boo
Page 3 and 4: Foreword Design is an integral aspe
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: 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
Page 53 and 54: MACHINE DRAWING 2.4 STANDARD PROFIL
Page 55 and 56: MACHINE DRAWING 2.4.2 METRIC THREAD
Page 57 and 58: MACHINE DRAWING Steps involved are
Page 59 and 60: MACHINE DRAWING 2.5 BOLTS In day to
Page 61 and 62: MACHINE DRAWING (vii) The end of th
Page 63 and 64: MACHINE DRAWING 2.5.3 T-BOLT Exampl
Page 65 and 66: MACHINE DRAWING Steps Involved Exer
Page 67 and 68: 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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