Engineering Graphics & Design — Winter 2022

Define representative fraction (R.F.) of scale. Also list types of scale according to value of R.F.

In a slider crank mechanism OBA, the crank OB is 200 mm long and the connecting rod BA is 850 mm long. Plot the locus of point Pwhere Pis midpoint of connecting rod. Refer figure 1.

Construct one complete turn of an involute of a circle having diameter 30 mm. Also draw tangent and normal to the curve S. The point Sis a point on the involute and it is at a distance of 45mm from centre of the circle.

Draw the projection of following points on the same X-Yline. (1) Point Ais 20 mm above HP and 30 mm behind V.P. (2) Point Bis on HP and 40 mm in front of V.P. (3) Point Cis 10 mm bellow HP and 25 mm behind V.P.

Aline MN, 60 mm long, is in V.P. It makes an angle of 30° with the H.P. The end point Mis 15 mm above H.P. Draw projections of line MN. Also measure Plan length of the line.

The line AB has its end A, 15 mm above H.P. and 10 mm in front of V.P. The end Bis 60 mm above H.P. The distance between the end projectors is 50 mm. The plan of the line is inclined at 25° to X-Yline. Draw the projections of line. Find true length and inclination of the line with H.P.

Draw the projections of a straight line 80 mm long inclined at 60° to H.P. and 30° to V.P. with end Ain the H.P. and the end Bin the V.P.

Apentagonal plate, side 25 mm, is inclined to H.P. by 30°.It is perpendicular to V.P. and resting on HP on its one of the side. Draw projections of the plate.

Acircular disk, 50 mm in diameter, is resting on the H.P. on one of the point Aof the circumference. Plane is inclined to the H.P. such a way that the top view of it is an ellipse of minor axis 40 mm. Draw its projections.

Acone, base diameter 30 mm and height 60 mm, is resting on its base. It is cut by AIP inclined at 45°to H.P. and passing through midpoint of the axis of cone. Draw front view, sectional top view and true shape of this sectional solid.

Ahexagonal plate, side 25 mm, is inclined to H.P. by 45°. It is resting on HP on one of the corner. The plate is perpendicular to V.P. Draw projections of the plate.1

Asquare plate, 40 mm side, is resting on the H.P. on one of its sides. The plate is inclined to H.Psuch a way that it’s top view looks like a rectangle with 20 mm shorter side. Draw its projections.

Asquare prism, side of base 30 mm and height 45 mm, is resting on H.P. on one of the corners of the base. The longer edge containing that corner on which it rests, is inclined at 45° to H.P. and top view of it is inclined at 30° to V.P. Draw the projections when top end of the prism is nearer to V.P.

Develop the complete surface of a square prism of side of base 40 mm and height 80 mm.

Draw front view of an object shown in figure 2 using first angle projection methods.

Draw top view and left hand side view of object shown in figure 2 using first angle projection methods.

Draw the development of the lateral surface of a square pyramid, side of base 30 mm and height 50 mm, resting with its base on H.P. All edge of the base are equally inclined to V.P.

Draw front view of an object shown in figure 3 using first angle projection methods.

Draw top view and left hand side view of object shown in figure 3 using first angle projection methods.

Explain any three AutoCAD commands in short (1) Spline (2) Rotate (3) Polygon (4) Multiline

Draw isometric scale showing 100 mm isometric length equivalent to 100mm normal length.

Draw isometric projection of an object whose front view and top view are shown in figure 4.

Explain any three AutoCAD commands in short. (1) Circle (2) Array (3) Mirror (4) Filet Command

Draw isometric shape of a circle having 60 mm in diameter using four centre methods.

Draw isometric projection of an object whose front view, top view and side view are shown in figure 5.2