Engineering Graphics - May 2012

First Year Engineering (Set B) (Semester 2)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

Answer any one question from Q1 & Q2

1 (a) A rectangular plot of 100 square kilometers is represented on a certain map by a similar rectangular area of 4 square centimeters. Draw a scale to read 50 kilometers and marks a distance of 43 kilometers on it.(7 marks) 1 (b) Draw an epicyloids of circle of 40 mm dia which rolls outside on another circle of 120 mm diameter for one revolution clockwise.(7 marks) 10 (a) Define CAD and list of three advantages of it.(7 marks) 10 (b) What is an editing command. Explain the functions of the following commands:
(i) Move
(ii) Mirror
(iii) Hatch
(iv) Offset
(v) Copy(7 marks) 2 (a) Construct the scale of chords, showing 5° divisions. Also setoff an angle of 55° using this scale.(7 marks) 2 (b) A plot of ground is in the shape of a parallelogram 120m × 80m, the angle between the sides is 60°. Inscribe an elliptical flower led in it.(7 marks)

Answer any one question from Q3 & Q4

3 A line PQ is in first quadrant. It's end P and Q are 15 mm and 45 mm in front of the V.P. respectively. The distance between the end projectors is 55 mm. The line is inclined at 30° to the H.P. and it's H.T. is 8mm above the XY line. Draw the projections of the PQ and find it's true length and locate it's V.T.(14 marks) 4 A line LM 70 mm long has it's end L 10 mm above H.P. and 15 mm in front of V.P. it's top view and front view measures 60 mm and 40 mm respectively. Draw the projections of the line and determine it's inclinations with H.P. and V.P.(14 marks)

Answer any one question from Q5 & Q6

5 (a) A square ABCD of 50 mm side has it's corner A in the H.P. it's diagonal AC inclined at 30° to the H.P. and the diagonal BD inclined at 45° to the V.P. and parallel to H.P. Draw it's projections.(7 marks) 5 (b) A pentagonal pyramid, side of base 25 mm and length of axis 50 mm lies on one of it's slant edges with it's axis parallel to V.P. Draw the projections of the pyramid.(7 marks) 6 A right regular pentagonal prism, side of base 30 mm and height 75 mm rests on one of it's base corners on H.P. such that it's long edge containing the corner is inclined to H.P. at 60° and side of the base, opposite the corner, inclined at 30° to the V.P. Draw it's projections keeping the vertex towards the V.P.(14 marks)

Answer any one question from Q7 & Q8

7 A right regular pentagonal pyramid,side of base 25mm and length of axis 50 m lies on one of it's triangular faces on H.P. with it's axis parallel to V.P. A section plane perpendicular to the H.P. and inclined to the V.P.at 30° cuts the pyramid bisecting it's axis. Draw it's top view, sectional front view and trace shape of the section.(14 marks) 8 A right circuit cone of base 60 mm diameter and 60 mm height stands vertically with it's base on H.P. A semi-circular hole of 36 mm diameter is cut through the cone such that the axis of the hole is parallel to H.P. perpendicular to V.P. and intersecting the axis of the cone 20 mm above the base. The flat surface of the hole is parallel to H.P. and perpendicular to the V.P. Draw the development of the lateral surface of the cone with hole.(14 marks)

Answer any one question from Q9 & Q10

9 Draw the isometric view of a funnel consisting of cylinder and a frustum of a cone. The diameter of the cylinder is 100 mm and the top diameter of the frustum is 68 mm. The height of the frustum and cylinder are each equal to 40 mm.(14 marks)