Ge2111 ENGINEERING GRAPHICS
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This document is an exam question paper that contains 5 questions related to engineering graphics. Each question contains multiple parts related to drawing projections or views of different geometric shapes and objects. Specifically: - Question 1 involves drawing the projections of a parabola or tracing the path of a string wound around a circle. - Question 2 involves drawing orthographic or isometric projections of objects like an inclined stick or a rhombus representing a cube. - Question 3 involves drawing the projections of a cube or square pyramid. - Question 4 involves drawing sectional views of objects like a cylinder with a hexagonal slot or a pentagonal pyramid cut by a plane. - Question 5 involves drawing an isometric
Ge2111 ENGINEERING GRAPHICS
- 1. I· Question Paper Code: 23639 B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2018. First Semester Civil Engineering GE 2111- ENGINEERING GRAPHICS (Common to All Branches) ,. (Regulations 2008) Time : Three hours Maximum :.100 marks Answer ALL questions. (5 X 20 =100) 1. (a) Construct a parabola when the distance between focus and the directrix is 40 'mm ~sing eccentricity method. Draw tangent· and normal at any point on the resultant Clrv'e. Or (b) An inelastic string of length 100 mm is wound a round a circle of diameter 26 ~m. Draw the path traced by the end of the string. Draw also a normal and tangent at any point on the curve. 2. (a) (i) A magician performs the trick of a floating stick. As seen by a person sitting right in front, as_ per the orthographic projection rules, the stick has its ends 0.2m and 0.6 m above the floor and appears to. be inclined at 30° to the floor. The same two ends· are found to be 0.1 m and 0.7 m respectively in front of the screen, arranged behind the stick. Adopting a suitable scale, dra.w the ·- projections of the stick. Also, find the true length of the stick and its true angles of inclination with the floor and the vertical screen. (10) (ii) A rhoinbus of diagonals 25 mm and 15 mm with longer diagonal being parallel to :xy-line represents the top view of a square of~ diagonal25 mm, with a corner on'HP. Draw its front view. ·(10) Or ~~__., BIBIN.C / ASSOCIATE PROFESSOR / MECHANICAL ENGINEERING / RMK COLLEGE OF ENGINEERING AND TECHNOLOGY 1
- 2. · (b) (i) A straight line AB oflength 100 mm has its end A 10 mm in front of VP and B 20.mm above HP. The front view and top view of the line measure 80 mm and 60 mm respectively. Draw the projections of the line·and obtain the true angles of inclination with HP and VP. (10) (ii) A hexagonal lamina of side 30 mm is resting on HP on·one of its corners with the sides c.Qntaining the corner being equally inclined to HP. '!'he surface of the lamina makes an angle of 30° with HP. Draw the top view ;md front view of the lamina if the plan of the diagonal passing through that corner is inclined at 50° to xy-line. (10) 3. .(a) Draw the projections of a cube ofedge 45 mm resting on one·ofits corners on HP, with a solid diagonal perpendicular toHP. (20) Or (b) A square pyramid of base. 40 mm and axis 70 mm long has one of its triangular faces: on VP and the edge of base contained· by that face perpendicular to HP. Draw its projections. (20) 4. (a) A cylinder of diameter 60 mm and height 80 mm has a central hexagonal slot of side 20 mm running right through the length. The cylinder is lying on the HP with its aXis perpendicular to the VP. A vertical cutting plane cuts the cylinder in· such a way that it meets the bases at 6 mm from diametrically opposite end,s. Draw the sectional front view and the true · shape of the section. (20) Or (b) A pentagonal pyramid side of base 30 mm and qeight 52 mm,·stands with its base on HP and an edge of the base is parallel to VP and nearer to it. It is ~ut by a plane perpendicular to VP, inclined at 40° to HP and passing through a point on the axis,· 32 mm above the base. Draw the _,- .sectional top view. Develop the lateral surfaces of the trup.catedpyramid. (20) 5. (a) A sphere of radius ·50 mm is kept centrally over a frustum of square pyramid of side 120 mm at the bottom ao.d 80 mm at the top and height 100 mm. Draw the isometric view of the assembly. Or ' ' (b) A square pyramid of base edge 20 mm,and altitude 40 mm rests on its base on the ground with a base edge parallel to the picture plane. The axis of the pyramid is 25 mni behind the PP and 25~ mm to the right of the eye. The eye is 50 mm in frQnt of the PP and 50 mm above the ground: Draw the perspective view of th~ pytamid. 2 23639 BIBIN.C / ASSOCIATE PROFESSOR / MECHANICAL ENGINEERING / RMK COLLEGE OF ENGINEERING AND TECHNOLOGY 2