VTU Mechanical Engineering (Semester 3)
Computer Aided Machine Drawing
June 2013
Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 A hexagonal pyramid sides of base 30mm and attitude 70mm is rests with its with its base on the HP and with a side of base parallel to the VP. It is cut by a cutting plane inclined at 35° to the HP and perpendicular to he VP and is bisecting and axix. Draw the front view the sectional view looking from the top and true shape of section.
20 M

2 Draw the following profiles.
a. Acme thread
b.ISO thread of pitch 50mm both.
20 M

3 Draw two views of a double riveted butt joint with single cover plate to connect two plates of 10mm thick. Adopt chain riveting. Use snap head rivets. Show three rivets in a row. Mark all proportions on the views.
20 M

4 Draw sectional FV & side view of a protected type flange coupling to connect two shafts of diameter 30mm. Indicate dimensions.
20 M

5 Following figure 1 shows the details of Rams bottom safety valve. Assemble the parts and draw i)Front view in half section ii) Top view.
60 M

6 Details of screw jack is shown in following figure 2.Assemble the parts and draw the following views i)Right half sectional front view. ii) Top view
60 M

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