Anna University GE2111 Engineering Graphics Dec 2011 Question Paper

BE/BTech (First/Second) Semester Exam Nov-Dec 2011 (Regulation 2010)

(Common to all Branches)
Time: 3 hrs
Maximum Marks: 100
Minimum Marks: 35

Note: Answer ALL Questions.

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. 20 marks

Ans: Refer problem 5.1 Page 5.6 of ED - Basant Agrawal, TMH.

OR

1. b) Make free hand sketches of the front, top and left side view of the object shown in Fig. Q 1(b). 20 marks

Ans: Refer problems 7.1 to 7.11 Page 7.10-7.13 of ED - Basant Agrawal, TMH.

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. 20 marks

Ans: Refer problem 9.31 Page 9.33 of ED - Basant Agrawal, TMH.

OR

2. 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. 20 marks

Ans: Refer problem 10.14 Page 10.22 of ED - Basant Agrawal, TMH.

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. 20 marks

Ans: Refer problem 11.10 Page 11.14 of ED - Basant Agrawal, TMH.

OR

3. b) A pentagonal pyramid of base edge 25 mm and axis length 60 mm rests on one base side on H.P. that the highest base corner is 20 mm above HP. Its axis is parallel to VP. Draw its top and front views. 20 marks

Ans: Refer problem 11.13 and 11.35 Page 11.20 of ED - Basant Agrawal, TMH.

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. 20 marks
Ans: Refer problem 12.54 Page 12.45 of ED - Basant Agrawal, TMH

OR

4. 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 toV.P. and parallel to H.P. Draw the lateral surface development of the solid. 20 marks

Ans: Refer problem 13.23 Page 13.21 of ED - Basant Agrawal, TMH.

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. 20 marks

Ans: Refer 15.10 Page 15.11 of ED - Basant Agrawal, TMH.

OR

5. 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. 20 marks
Ans: Refer problem 17.4 Page 17.8 of ED - Basant Agrawal, TMH.