BE (First/Second) Semester Exam(Common to all Branches)
Time: 3 hrs
Maximum Marks: 80
Minimum Marks: 28
Time: 3 hrs
Maximum Marks: 80
Minimum Marks: 28
Note:
Attempt any five questions. All questions carry equal marks. Answer the questions in drawing sheet only.1. a) Draw a scale of 1:50 showing metres and decimetres and to measure upto 6 metres. 8 marks
Ans: Refer problem 4.1 Page 4.4 of ED - Basant Agrawal, TMH.
1. b) The major and the minor axes of an elipse are 125 mm and 100 mm long respectively. Draw the curve by any one of the standard method and locate its focii. 8 marks
Ans: Refer problem 5.5 Page 5.8 of ED - Basant Agrawal, TMH.
2. a) Construct a cycloid having a rolling circle diameter of 50 mm. Draw a normal and tangent to the curve at a point 35 mm above the base line. 8 marks
Ans: Refer problem 6.1 Page 6.1 of ED - Basant Agrawal, TMH.
2. b) A line AB of 100 mm length is inclined at an angle 30º to the H.P. and parallel to V.P. The point A is 15 mm above H.P. and 20 mm in front of V.P. Draw the front view and top view of the line. 8 marks
Ans: Refer problem 9.4 Page 9.5 of ED - Basant Agrawal, TMH.
3. A line AB of 80 mm long has its end A, 15 mm from both H.P. and V.P. The other end B is 40 mm above H.P. and 50 mm in front of V.P. Draw the projections of the line and determine inclinations of the line with H.P. and V.P. 16 marks
Ans: Refer problem 9.24 Page 9.27 of ED - Basant Agrawal, TMH.
4. a) Draw the projections of a circle of 60 mm diameter resting on V.P. on a point of the circumference. The plane is inclined at 45º to V.P. and perpendicular to the H.P. the centre of the plane is 40 mm above H.P. 8 marks
Ans: Refer problem 10.7 Page 10.7 of ED - Basant Agrawal, TMH.
4. b) A cube of 40 mm side is resting with a face on H.P. such that the vertical faces are equally inclined to V.P. Draw its projections. 8 marksAns: Draw only first stage of Fig 11.27 Page 11.23 of ED - Basant Agrawal, TMH.
5. A hexagonal prism of base 25 mm and axis 45 mm long is positioned with one of its base edges on H.P. such that the axis is inclined at 30º to H.P. and 45º to the V.P. Draw the projections of the prism by change of position method. 16 marks
Ans: Refer problem 11.29 Page 11.32 of ED - Basant Agrawal, TMH.
6. a) A hexagonal pyramid of side of base 30 mm and axis 60 mm long is resting on its base on H.P. with an edge of the base perpendicular to the V.P. It is cut by a section plane inclined at 30º to the H.P. and passing through the axis at 20 mm from the base. Draw the sectional view, top view and true shape of the section. 10 marks
Ans: Refer problem 8 Page 12.36 of ED - Basant Agrawal, TMH.
6. b) A square prism of side of base 40 mm and axis 80 mm long is resting on its base on H.P. such that a rectangular face of it is parallel to V.P. Draw the development of the prism. 6 marks
Ans: Refer problem 13.1 Page 13.2 of ED - Basant Agrawal, TMH.
7. A cone of diameter of base 60 mm and height 65 mm rests with its base on H.P. A cutting plane perpendicular to V.P. and inclined at 30º to H.P. cuts the cone such that it passes through a point on the axis at a distance 30 mm above the base. Draw the isometric projections of the cone. 16 marks
Ans: Similar to problem 15.18 Page 15.15 of ED - Basant Agrawal, TMH.
8. a) Write two advantages of CAD. 2 marks
Ans: Refer problem 1 Page 18.44 of ED - Basant Agrawal, TMH.
8. b) Name two editing commands used in CAD. 2 marks
Ans: Refer section 18.16 Page 18.26 of ED - Basant Agrawal, TMH.
8. c) Name two CAD softwares. 2 marks
Ans: Refer section 18.3 Page 18.1 of ED - Basant Agrawal, TMH.
8. d) State whether the following statements are true or false: 10 marks
(i) The R.F. of an enlarging scale is more than 1. True
(ii) The scale of chord is used to measure distances in mm, cm, sm. False
(iii) Conic sections like ellipse are generated by cutting a right circular cone in different positions relative to the axis of the cone by a cutting plane. True
(iv) The projecting lines meet the plane of projection at an angle of 80º to it. False
(v) When a point is above H.P., its front view lies below xy. False.
(vi) When a straight line is parallel to H.P. its front view will be equal to its true length. False
(vii) Using change of position method, projections of a solid inclined to reference planes could be obtained. True
(viii) The section lines in a sectional view are drawn at an angle of 85º to the outlines. False
(x) Isometric projections is a pictorial projection of an object in which all the three dimensions of an object is revealed. True
(x) Computer aided drafting help in making speedier and accurate projection of an object. True
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