**Anna University**

**B.E./B.Tech. DEGREE EXAMINATIONS, MAY/JUNE 2010**

**Regulations 2008**

**First Semester**

**Common to all branches**

**GE2111 Engineering Graphics**

Time: Three Hours

Maximum: 100 Marks

**Answer ALL Questions**

**(5 x 20 = 100 Marks)**

1. (a) Draw *t *he locus *o*f a point P which moves *i *n a plane in such a way that th*e *ratio of its distances from a fixed point F *a *nd a fixed straight line AB i*s *always 2/3. The distance between *t *he fixed point F *a *nd fixed straight line *i *s 50 mm. Also draw a tangent and normal on a point on t*h *e locus at a horizontal distance of 55 mm from *t *he fixed straight line. (20) OR

1. (b) Draw free hand sketches o*f t *he front, top *a *nd right side views *o*f the object shown i*n *Fig. 1(b). (20)

2. (a) The projections of a line measures 80 mm *i *n t*h *e top view *a *nd 70 mm *i *n *t *he front view. The mid point of th*e *line is 45 mm *i *n front o*f *VP *a *nd 35 mm above HP. One end *i *s 10 mm *i *n front of VP an*d *nearer to it. The other end is nearer to HP. Draw *t *he projections o*f t *he line. Find *t *he true length *a*nd true inclinations. (20)

OR

2. (b) A square lamina ABCD of 40 mm side rests on th*e *corner C such that th*e *diagonal AC appears to be at 30*◦** *to t*h *e VP *i *n *t *he top view. The two sides BC *a *nd CD containing the corner C make equal inclinations with t*h *e HP. The surface of *t *he lamina makes 45*◦** *with HP. Draw t*h *e top *a *nd front views. (20)

3. (a) Draw *t *he projections *o*f a cone of base diameter 50 mm an*d *axis of length 70 mm resting on *t *he ground on one o*f *its generators with *t *he axis *o*f cone parallel to VP. (20)

OR

3. (b) A right regular hexagonal pyramid, edge *o*f base 25 mm and height 50 mm, rests on one o*f *its base edges on HP with its axis parallel to VP. Draw th*e *projections o*f t *he pyramid when its base makes *a *n angle *o*f 45*◦** *to the HP.

(20)

4. (a) A square pyramid o*f *base side 25 mm an*d *height 40 mm rests on HP with its base edges equally inclined to VP. It i*s *cut by a plane perpendicular to VP *a *nd inclined at 30*◦** *to HP meeting *t *he axis at 21 mm from *t *he base. Draw the sectional top view a*n *d true shape of *t *he section. (20)

OR

4. (b) A vertical hexagonal prism o*f *30 mm side *o*f base *a *nd axis 65 mm long has one *o*f its rectangular faces parallel to VP and nearer to it. A circular hole o*f *40 mm diameter is drilled through *t *he prism completely such that t*h *e axis *o*f *t *he hole bisects *t *he axis of th*e *prism at right angles an*d *i*s *perpendicular to VP. Draw *t *he development *o*f *t *he prism showing the shape o*f *th*e *hole on it. (20)

5. (a) A right circular cone o*f *diameter 30 mm base *a *nd height 36 mm rests centrally on top *o*f a square block *o*f 48 mm side and 22 mm thick. Draw t*h *e isometric projection of *t *he two solids. (20)

OR

5. (b) A pentagonal pyramid side o*f *base 25 mm *a *nd height 50 mm rests with one *o*f its corner *o*f the base touching t*h *e picture plane an*d *t*h *e base edges passing through this corner making equal inclinations with *t *he picture plane. The station point *i *s on *t *he central line, 100 mm in front of *t *he picture plane an*d *75 mm above t*h *e ground. Draw *t *he perspective view *o*f *t *he pyramid. (20)