Anna University GE2111 Engineering Graphics Jan 2010 Question Paper

BE/BTech (First/Second) Semester Exam January 2010 (Regulation 2008)

(Common to all Branches)
Time: 3 hrs
Maximum Marks: 100
Minimum Marks: 35
PAPER CODE P1713

Note: Answer ALL Questions.

1. a) The focus of a conic is 50 mm from the directrix. Draw the locus of a point 'P' moving in such a way that its distance from the directrix is equal to its distance from the focus. Name the curve. Draw a tangent to the curve at a point 60 mm from the directrix. 20 marks

Ans: Refer problem 5.15 Page 5.15 of ED - Basant Agrawal, TMH.

OR

1. b) Make free hand sketches of the front, top and right side views of the object shown below: 20 marks

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

2. a) The projections of a line measures 80 mm in the top view and 70 mm in the front view. The mid point of the line is 45 mm in front of VP and 35 mm above HP. One end is 10 mm in front of VP and nearer to it. The other end is nearer to HP. Draw the projections of the line. Find the true length and true inclinations. 20 marks

Ans: Refer

OR

2. b) Draw the projections of a circle of 70 mm diameter resting on the H.P. on a point A of the circumference. The plane is inclined to the H.P. such that the top view of it is an ellipse of minor axis 40 mm. The top view of the diameter, through the point A is making an angle of 45º with the V.P. Determine the inclination of the plane with the H.P. 20 marks

Ans: Refer problem 10.23 Page 10.24 of ED - Basant Agrawal, TMH.

3. a) An equilateral triangular prism 20 mm side of base and 50 mm long rests with one of its shorter edges on H.P. such that the rectangular face containing the edge on which the prism rests is inclined at 30º to H.P. The shorter edge resting on HP is perpendicular to VP. 20 marks

Ans: Refer problem 11.9 Page 11.13 of ED - Basant Agrawal, TMH.

OR

3. b) Draw the projections of a hexagonal pyramid with side of the base 30 mm and axis 70 mm long, when it is resting with one of the base sides on H.P. such that the triangular face containing that side is perpendicular to H.P. and axis is parallel to V.P. 20 marks

Ans: Refer problem 11.41(two stages only) Page 11.42 of ED - Basant Agrawal, TMH.

4. a) A vertical cylinder 40 mm diameter is cut by a vertical section plane making 30º to V.P. in such a way that the true shape of the section is a rectangle of 25 mm and 60 mm sides. Draw the projections and true shape of the section. 20 marks
Ans: Refer problem 12.47 Page 12.40 of ED - Basant Agrawal, TMH

OR

4. b) A regular hexagonal pyramid side of base 30 mm and height 60 mm is resting vertically on its base on H.P., such that two of its sides of the base are perpendicular to VP. It is cut by a plane inclined at 40º to H.P. and perpendicular to V.P. The cutting plane bisects the axis of the pyramid. Obtain the development of the lateral surface of the truncated pyramid. 20 marks

Ans: Refer problem 13.2 Page 13.2 of ED - Basant Agrawal, TMH.

5. a) A cylinder of 50 mm diameter and 75 mm height stands with its base on H.P. It is cut by a section plane inclined at 45º to H.P. and perpendicular to V.P., passing through a point on the axis 20 mm below the top end. Draw the isometric projection of the truncated cylinder. 20 marks

Ans: Refer problem 15.12 Page 15.12 of ED - Basant Agrawal, TMH.

OR

5. b) Draw the perspective projection of a cube of 25 mm edge, lying on a face on the ground plane, with an edge touching the picture plane and all vertical faces equally inclined to the picture plane. The station point is 50 mm in front of the picture plane, 35 mm above the ground plane and lies in a central plane which i s 10 mm to the left of the center of the cube. 20 marks
Ans: Refer problem 17.4 Page 17.8 of ED - Basant Agrawal, TMH.