**B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011**

**Common to All B.E./B.Tech.**

**First Semester**

**185101 — ENGINEERING GRAPHICS**

**(REGULATION 2010)**

**Time : Three hours Maximum : 100 marks**

**Answer ALL questions.**

**(5 X20 = 100 marks)**

**1. (a) Construct an ellipse when the distance of its focus from its directrix is**

**equal to 50 mm and the eccentricity is 2/3. Also draw a tangent and a**

**normal to the ellipse.**

**Or**

**(b) Make free hand sketches of the front, top and left side view of the object**

**shown in Fib. Q 1(b).**

**Fib. Q 1(b)**

**2. (a) A Line AB has its end A 15 mm above H.P and 20 mm in front of V.P.**

**The end B is 60 mm above H.P. and the line is inclined at 30° to H.P. The**

**distance between the end projectors of the line is 55 mm. Draw the**

**projections and find its inclination with V.P.**

**Or**

**(b) A regular hexagonal lamina of 40 mm side is resting on one of its corner**

**on H.P. Its surface is inclined at 45° to H.P. The plan of the diagonal**

**through the corner which is on H.P. makes an angle of 45° with XY. Draw**

**its projections.**

**3. (a) A hexagonal prism of side of base 25 mm and axis 60 mm rests on a**

**corner of its base in H.P. with the axis of the prism inclined at 40° to H.P.**

**and parallel to V.P. Draw its projections.**

**Or**

**(b) A pentagonal pyramid of base edge 25 mm and axis length 60 mm rests**

**on one base side on HP such that the highest base corner is 20 mm above**

**HP. Its axis is parallel to VP. Draw its top and front views.**

**4. (a) A tetrahedron of 60 mm long edges rests with one of its face on H.P. and**

**an edge is perpendicular to V.P. A section plane perpendicular to V.P**

**cuts the tetrahedron such that the true shape of section is an isosceles**

**triangle of base 50 mm and altitude 36 mm. Draw the front view,**

**sectional top view and the true shape of the section. Also find the**

**inclination of the section plane.**

**Or**

**(b) A vertical cylinder of diameter 50 mm and height 80 mm is drilled by a**

**hole of diameter 30 mm such that the axis of the hole is perpendicular to**

**V.P. and parallel to H.P. Draw the lateral surface development of the**

**solid.**

**5. (a) A hexagonal prism of base edge, 20 mm and height 60 mm rests on the**

**H.P. on its base with two of its rectangular faces parallel to V.P. It is cut**

**by a plane inclined at 30° to H.P cutting the axis of the prism at a height**

**of 45 mm from its base. Draw the isometric view of the truncated prism.**

**Or**

**(b) A square prism of 55 mm edge of base and 70 mm height is placed on the**

**ground behind the PP with its axis vertical and one of the edges of the**

**base receding to the left at an angle of 40° to the PP. The nearest vertical**

**edge of the solid is 20 mm behind PP and 25 mm to the left of the**

**observer who is at a distance of 120 mm in front of PP. The height of the**

**observer above the ground is 100 mm. Draw the perspective view of the**

**prism.**

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