JNTU
JNTU B.Tech I Year ENGINEERING DRAWING Previous Question Paper (May/June - 2019 - R15)
Answer all five questions. All questions carry equal marks.
Main
Construct a plain scale of RF=1/40 to read meters and decimeters. Maximum length to be measured using it is 5 meters. Mark on it a distance of 3.4 m.
Answer
To construct the plain scale:
- Calculate the Length of Scale (LOS): LOS = RF × Maximum Length = (1/40) × 5 m = (1/40) × 500 cm = 12.5 cm.
- Draw a line 12.5 cm long and divide it into 5 equal parts, each representing 1 meter.
- Divide the first part (0 to 1) into 10 equal subdivisions, where each subdivision represents 1 decimeter (1/10 of a meter).
- To mark 3.4 m, place the starting point at the 3m division and measure 4 subdivisions towards the right into the decimeter section.
Draw a diagonal scale of RF = 1/25 to read meters, decimeters and centimeters. The scale must be long enough to read 4 m. Mark off on this scale distance of 2.34 m and 0.68 m.
Answer
To construct the diagonal scale:
- Calculate the Length of Scale (LOS): LOS = RF × Maximum Length = (1/25) × 4 m = (1/25) × 400 cm = 16 cm.
- Draw a rectangle of 16 cm length and a suitable height (e.g., 5 cm). Divide the length into 4 equal parts, each representing 1 meter.
- Divide the first part into 10 subdivisions, each representing 1 decimeter.
- Divide the height into 10 equal horizontal rows, each representing 1 centimeter.
- Draw diagonal lines from the division points on the top edge to the corresponding points on the bottom edge to enable reading centimeters.
- To mark 2.34 m, locate 2m on the main scale, 3 decimeters on the subdivision, and move up 4 units on the diagonal line.
- To mark 0.68 m, locate 0m on the main scale, 6 decimeters on the subdivision, and move up 8 units on the diagonal line.
A fish pond of elliptical shape is to be inscribed inside a rectangular plot of size 100 m x 50 m. Draw the boundary line of the fish pond of scale 1:100.
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The conjugate axes of an ellipse are 100 mm and 60 mm with an inclined angle of 60°. Construct an ellipse and determine its major and minor axes graphically.
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A point moves such that the sum of its distances from two fixed points 100 mm apart is always constant and is equal to 140 mm. Draw the locus of the point. Draw also the tangent and normal to the curve at any point on it.
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A line AB 60 mm long has its end A 20 mm above HP and 30 mm in front of VP. The line is inclined at 40° to VP and parallel to HP. Draw its projections and mark the traces.
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A line CD measuring 80 mm is inclined at an angle of 30° to HP and 45° to VP. The point C is 20 mm above HP and 30 mm in front of VP. Draw the projections of the straight line.
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A circular plate of diameter 50 mm is resting on HP on a point on the circumference with its surface inclined at 45° to HP and perpendicular to VP. Draw its projections.
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A hexagonal pyramid, base 25 mm side and axis 55 mm long, has one of its slant edges on the ground. A plane containing that edge and the axis is perpendicular to the H.P. and inclined at 45° to the V.P. Draw its projections when the apex is nearer the V.P. than the base.
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A cone, diameter of base 52 mm and axis 68 mm long, is resting on the HP on one of its generators such that the axis is parallel to VP. It is cut by a horizontal section plane 13 mm above the HP. Draw its sectional top view and true shape of the section.
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A hexagonal prism of base side 30 mm and axis length 60 mm is resting on HP on its base with two of its vertical faces perpendicular to VP. It is cut by a plane inclined at 50° to HP and perpendicular to VP and meets the axis of prism at a distance 10 mm from the top end. Draw the development of the lateral surface of the prism.
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A hexagonal pyramid side of base 30 mm and altitude 30 mm rests with its base on HP and with a side of base parallel to VP. It is cut by a cutting plane inclined at 35° to HP and perpendicular to VP and is bisecting the axis. Draw the sectional plan of the pyramid and the true shape of the section.
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A cylindrical slab 50 mm in diameter and 45 mm thick is surmounted by a cube of 30 mm edge. A square pyramid of altitude 45 mm and side of 25 mm rests on the top of the cube with the side of its base parallel to the sides of the top of the cube. The axes of the solids are collinear. Draw the isometric projection.
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Draw the front view, top view and side view shown in figure. All dimensions are in mm.
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