Engineering Drawing – Lab and Home Assignments

Lab Assignment 1 [Engineering Curves I] Submission Date – 18/12/2024

1. A point moves in a plane in such a way that the sum of its distances from two fixed points 100 mm apart is 130 mm. Name and draw the locus of this point.
2. The major axis of an ellipse is 110 mm and minor axis is 70 mm long. Draw an ellipse by concentric circle method.
3. Inscribe the largest possible ellipse in a rectangle of sides 160 mm and 100 mm.
4. A parabolic arch has a span1# of 160 mm and a maximum rise of 100 mm. Draw a curve using Tangent method.
5. Draw a parabola of base 120 mm and axis 80 mm by oblong method.
6. Draw a hyperbola when its asymptotes are inclined at 60o to each other and passes through a point P. The point P is at a distance of 40 mm and 50 mm from the asymptotes.

Lab Assignment 2 [Engineering Curves II] Submission Date – 19/12/2024

1. Draw a cycloid of a circle of diameter 50 mm for one revolution. Also, draw a tangent and a normal to the curve at a point 35 mm above the base line.
2. Draw an epicycloid of a circle of diameter 50 mm, which rolls outside a circle of diameter 180 mm for one revolution. Also, draw a tangent and a normal to the epicycloid at a point 135 mm from the centre of the directing circle.
3. Draw a hypocycloid of a circle of diameter 50 mm, which rolls inside a circle of diameter 180 mm for one revolution. Also, draw a tangent and a normal to the hypocycloid at a point 50 mm from the centre of the directing circle.
4. Draw an involute of a circle of diameter 50 mm. Also draw normal and tangent at a point 100 mm from the centre of the circle.
5. Draw an Archimedean spiral of 1½ convolutions for the shortest and the greatest radii as 20 mm and 90 mm, respectively. Also, draw a tangent and a normal to the curve at a point 50 mm from the pole.
6. Draw a logarithmic spiral of one convolution, when the shortest distance is 16 mm and ratio of the length of radius vectors enclosing an angle of 30° is 9:8. Also, draw a tangent and a normal to the curve at a point 50 mm from the pole.

Lab Assignment 3 [Engineering Scales] Submission Date – 25/12/2024

1. An area of 49 square centimetres on a map represents an area of 16 sq. m on a field. Draw a scale long enough to measure 8 m. Mark a distance of 6 m 9 dm on the scale.
2. The distance between two stations by road is 200 km and it is represented on a certain map by a 5 cm long line. Find the R.F. and construct a diagonal scale showing single kilometre and long enough to measure up to 600 km. Show a distance of 467 km on this scale.
3. On a railway map, an actual distance of 36 miles between two stations is represented by a line 10 cm long. Draw a plain scale to show mile and long enough to read up to 60 miles. Also draw a comparative scale attached to it to show kilometre and read up to 90 kilometres. On the scale show the distance in kilometres equivalent to 46 miles. Take 1 mile = 1609 metres.
4. Construct a ver nier scale of 1:40 to read metres, decimetres and centimetres and long enough to measure up to 6 m. Mark a distance of 5.76 m on it.

Lab Assignment 4 [Orthographic Projections] Submission Date – 25/12/2024

Lab Assignment 5 [Isometric Projections]

Lab Assignment 6 [Projection of Straight Lines]

Lab Assignment 7 [Projection of Planes]

1. Draw the projections of a rhombus having 100 mm and 40 mm long diagonals. The bigger diagonal is inclined at 30 degree to HP with one of the end point in HP and the smaller diagonal is parallel to both the planes.
2. A pentagon ABCDE of 30 mm side has its side AB in the VP and inclined at 30 degree to the HP and the corner B is 15 mm above the HP and the corner D is 30 mm in front of the VP. Draw the projections of the plane and find its inclination with the VP
3. A plate having shape of an isosceles triangle has 50 mm long base and 70 mm altitude. It is so placed that in the front view it is seen as an equilateral triangle of 50 mm side and one side inclined at 45 degree to XY. Draw its top view.
4. An elevation of a rectangular lamina ABCD of 25 mm x 50 mm sides is a square of 25 mm side when its side AB is in VP and the side AD is making an angle of 20 degree to the HP. Draw its projections.
5. A thin square plate of 50 mm side stands on one of its corners in the HP and the opposite corner is raised so that one of the diagonals is twice that of the others. If, one of the diagonal is parallel to both the planes, draw its projection and determine an inclination of the plane of the plate with the HP.
6. A circular plate of negligible thickness and 50 mm diameter appears as an ellipse in the front view, having major axis 50 mm and minor axis 30 mm long. Draw its top view when major axis of the ellipse is horizontal.
7. A trapezium ABCD ( AB=70 mm, CD=40 mm) having parallel sides 60 mm apart is kept on its AB in the VP such that its front view appears as another trapezium of same parallel sides but 30 mm apart . Draw the projections of the trapezium when the side in the VP makes an angle of 45 degree with the HP.
8. A semicircular plate of 80 mm diameter has its straight edge on the VP and inclined at 30 degrees to the HP, while the surface of the plate is inclined at 45 degrees to the VP Draw the projection of the plate.
9. A hexagonal plane figure of 30 mm side is resting on a corner in the VP with its surface making an angle of 30 degree with the VP The view from the front of the diagonal passing through that corner is inclined at 35 degree to the HP. Draw the three principal views.

Lab Assignment 8 [Projection of Solids, Section of Solids and Development of Lateral Surface]

1. A cylinder, 60 mm diameter and 75 mm long, has its axis parallel to both the H.P. and the V.P. It is cut by a vertical section plane inclined at 30° to the V.P., so that the axis is cut at a point 40 mm from one of its ends and both the bases of the cylinder are partly cut. Draw its sectional front view and true shape of the section, also draw the development of the sectioned solid.
2. A cone, base 70 mm diameter and axis 75 mm long is resting on its base on the H.P. It is cut by a section plane perpendicular to the V.P., inclined at 60° to the H.P. and cutting the axis at a point 35 mm from the apex. Draw its front view, sectional top view, sectional side view and true shape of the section, also draw the development of the sectioned solid.
3. An equilateral triangular prism, base 50 mm side and height 100 mm is standing on the H.P. on its triangular face with one of the sides of that face inclined at 90° to the V.P. It is cut by an inclined plane in such a way that the true shape of the section is a trapezium of 50 mm and 12 mm parallel sides. Draw the projections and true shape of the section and find the angle which the cutting plane makes with the H.P, also draw the development of the sectioned solid.
4. A square prism axis 110 mm long is resting on its base in the H.P. The edges of the base are equally inclined to V.P. The prism is cut by an A.I.P. passing through the mid-point of the axis in such a way that the true shape of the section is rhombus having diagonals of 100 mm and 50 mm. Draw the projections and determine the inclination of A.I.P. with the H.P, also draw the development of the sectioned solid.
5. A pentagonal pyramid, base side 35 mm, length of axis 75 mm is resting on a base edge on the H.P. with a triangular face containing that edge being perpendicular to the V.P. and inclined to the H.P. at 60°. It is cut by a horizontal section plane whose V.T. passes through the mid-point of the axis. Draw the front view, sectional top view and add a profile view, also draw the development of the sectioned solid.
6. A hexagonal prism, side of the base 25 mm long and axis 65 mm long is resting on an edge of the base on the H.P., its axis being inclined at 60° to the H.P. and parallel to the V.P. A section plane, inclined at 45° to the V.P. and normal to the H.P., cuts the prism and passes through a point on the axis at 20 mm from the top end of the axis. Draw its sectional front view and true shape of the section, also draw the development of the sectioned solid.
7. A sphere of 50 mm diameter is cut by a section plane perpendicular to the V.P., inclined at 45° to the H.P. and at a distance of 70 mm from its centre. Draw the sectional top view and true shape of the section.
8. Draw the projections of a cube of 25 mm long edges resting on the H.P on one of its corners with a solid diagonal perpendicular to the V.P.
9. A tetrahedron of 65 mm long edges is lying on the H.P. on one of its faces, with an edge perpendicular to the V.P. It is cut by a section plane which is perpendicular to the V.P. so that the true shape of the section is an isosceles triangle of base 50 mm long and altitude 40 mm. Find the inclination of the section plane with the H.P. and draw the front view, sectional top view and the true shape of the section.

Lab Assignment 9 [Interpenetration of Solids or Intersection of Surfaces]

1. A vertical square prism, base 50 mm side is completely penetrated by a horizontal square prism, base 35 mm side so that their axes are 6 mm apart. The axis of the horizontal prism is parallel to the V.P., while the faces of both prisms are equally inclined to the V.P. Draw the projections of the prisms showing lines of intersection.
2. A square pyramid of base sides 50 mm and height 60 mm. The sides of base are equally inclined with the VP. ft is penetrated by a horizontal triangular prism of sides 30 mm and 80 mm axis long. The axes of both solids are intersecting each other. The axis of triangular prism is 22 mm above H.P. and perpendicular to the VP. One of faces of triangular prism is perpendicular to the VP. Draw the top view, front view and side view showing the curve of the penetration.
3. A vertical cylinder of 80 mm diameter is penetrated by another cylinder of 60 mm diameter, the axis of which is parallel to both the H.P. and the V.P. The two axes are 8 mm apart. Draw the projections showing curves of intersection.
4. A vertical cone, diameter of base 75 mm and axis 100 mm long, is completely penetrated by a cylinder of 45 mm diameter. The axis of the cylinder is parallel to the H.P. and the V.P. and intersects the axis of the cone at a point 28 mm above the base. Draw the projections of the solids showing curves of intersection.