B.Tech I Semester (R20) Regular Examinations

Subject: Engineering Graphics (Common to CE & ME)

Time: 3 Hours Max. Marks: 70

Note: Answer all questions. All questions carry equal marks.

1. a) A point P is 20mm above HP and 30mm in front of VP. Another point Q is 40mm below HP and 20mm behind VP. Draw projections of P and Q keeping the distance between their projectors equal to 80mm. Also draw a straight line joining their top views.

   OR

   b) Draw a vernier scale of RF = 1:2.5 to read centimeters and millimeters and long enough to measure up to 200mm. Mark on it a length of 184mm.

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2. a) A line AB 75mm long makes an angle of 45° with the VP while its front view makes an angle of 55° with the XY line. The end A is 10mm in front of the VP and 15mm above the HP. Draw the projections of the line AB.

   OR

   b) A regular pentagonal lamina of 30mm side rests on HP on one of its sides such that the surface of the lamina is inclined at 30° to HP. The side on which it rests is inclined at 45° to VP. Draw the projections of the lamina.

3. a) A cone, base diameter 50mm and axis 65mm long, rests with its base on HP. A cutting plane perpendicular to VP and inclined at 30° to HP cuts the cone, bisecting the axis. Draw the front view, sectional top view and true shape of the section.

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   OR

   b) A cylinder of base diameter 50mm and height 70mm rests on its base on the HP. It is cut by a plane perpendicular to VP and inclined at 45° to HP such that the cutting plane meets the axis at a point 20mm from the top. Draw the development of the surface of the remaining (lower) portion of the cylinder.

4. a) Draw the isometric view of a square prism, with side of base 40mm and height 70mm, when the axis is vertical.

   OR

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   b) Draw the isometric view of a frustum of a cone having 60mm base diameter, 30mm top diameter and 70mm height.

5. Draw (i) Front view (ii) Top view and (iii) Side view from the left for the following figure (All dimensions are in mm)

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