# INDIAN SCHOOL AL WADI AL KABIR Class: XII Department .

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INDIAN SCHOOL AL WADI AL KABIRDepartment: SCIENCE – 2021-2022Class: XIIDate of Completion:06.05.21SUBJECT: ENGINEERING GRAPHICSWorksheet No:1Topic: ISOMETRIC PROJECTIONNote: A4 FILEFORMATCLASS: XIIROLL NO:With AnswersNAME OF THESTUDENT:SECTION:CMULTIPLE CHOICE QUESTIONS1.The angle difference between true scale and isometric scale is ------a)30 degreeb) 15 degreec)45 degreed) None of the above2.Which of the projection is mainly used in engineering practice -----a) Perspective projectionb) Isometric projectionc) Orthographic projectiond) Oblique projectionPage 1 of 10

3.Isometric projection comes under which category of projections----------a) Axonometric projectionb) Perspective projectionc) Oblique projectiond)None of the above4.In isometric projection all the three principal axes are inclined at an angle of ------a)120 degreeb)45 degreec)30 degreed) 60 degree5. The isometric projection of a sphere is -------a) Ellipseb) circlec) Sphered) None of the above6. The isometric length is measured in isometric scale at an angle of ----------a) 90 degreeb)45 degreec) 30 degreed) 20 degreePage 2 of 10

7. The true scale is measured in isometric scale at an angle of -----------a) 15 degreeb) 90 degreec) 45 degreed) 30 degree8.The isometric projection of a circle is -------a) circleb) Spherec)Ellipsed) None of the above9.The isometric view is the drawings with ----a) Reduced scaleb) Actual scalec) Vernier scaled) Isometric scale10.Isometric projection is smaller than actual drawings up to the value -------a) 82 %b)90 %c)75%d)None of the abovePage 3 of 10

WORKSHEET PRACTICE QUESTIONS1. Draw the isometric projection of a cylinder of 75 mm and diameter of 50 mm resting on itsbase keeping the axis parallel to VP.2. Draw an isometric projection of hemisphere resting centrally on its curved surface, on the tophorizontal rectangular face of an equilateral triangular prism, keeping two triangular facesparallel to the VP. Side of equilateral triangle 50mm, length of the prism 70 mm anddiameter of the hemisphere 60 mm.3. Draw the isometric projection of an equilateral triangular prism of 50 mm base side and 75mm axis resting on its base in HP with one of its base edge parallel to VP in front.4. Draw an Isometric Projection of 32 mm cube resting centrally on the top face of an equilateraltriangular prism having 50 mm base side and height 30 mm. One rectangular face of the prismis away from the observer and kept parallel to the V.P.5. Draw the isometric projection of an inverted hexagonal pyramid of base edge 30 mm andheight of 60 mm keeping two of its base side parallel to the VP.6. Draw an Isometric Projection of a vertical regular pentagonal pyramid resting centrally,having one base edge away from the observer parallel to V.P., on top of a vertical cylinder. Sideof the pentagon 32 mm, height of pyramid 50 mm, diameter of cylinder 76 mm and heightof cylinder 40 mm.7. Draw the isometric projection of cone of diameter 40 mm and axis of 60 mm resting on itsbase perpendicular to H.P.Page 4 of 10

8.Draw an Isometric Projection of a sphere resting centrally on a rectangular face of a horizontalhexagonal prism having its hexagonal ends perpendicular to V.P. Side of hexagon 30 mm,length of the prism 80 mm and diameter of sphere 60 mm.9. A Pentagonal prism of base side of 25 mm and axis length of 55 mm is resting on its face withits axis parallel to both H.P and V.P. Draw its isometric projection.10. Draw an Isometric Projection of a vertical regular hexagonal pyramid resting vertically andcentrally having two of its base edges perpendicular to V.P. On the top rectangular face of ahorizontal square prism with its square ends perpendicular to V.P. Side of the square 50 mm,length of the prism 100 mm, side of the hexagon 30 mm and height of the pyramid 60 mm.ANSWERS – MULTIPLE CHOICE QUESTIONS1. b) 15 degree2. b) Isometric projection3. a) Axonometric projection4. a) 120 degree5. a) Circle6. c) 30 degree7. c)45 degree8. c) Ellipse9. b) Actual scale10. a) 82%Page 5 of 10

SOLUTIONS FOR DRAWINGS1,2.3.Page 6 of 10

4.5.Page 7 of 10

6.Page 8 of 10

7.8.Page 9 of 10

9.10.PREPARED BY : MS. AISWARYA DCHECKED BY : HOD - SCIENCEPage 10 of 10

a) Perspective projection b) Isometric projection c) Orthographic projection d) Oblique projection INDIAN SCHOOL AL WADI AL KABIR Class: XII Department: SCIENCE – 2021-2022 SUBJECT: ENGINEERING GRAPHICS Date of Completion: 06.05.21 Worksheet No:1 With Answers Topic: ISOMETRIC

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