1. Attempt any four of the following questions:

What is a rivetted joint Classify the rivetted joints and explain anyone of the rivetted joints with the help of a neat sketch.

What is the function of keys Explain various types of keys with neat sketches.

Draw the front view, top view and side view of a hexagonal prism with 40 mm side and 200 mm height. Assume one face of the prism is parallel to the vertical plane.

Explain First Angle Projection and Third Angle Projection with the help of neat sketches.

What are foundation bolts? Explain with a neat sketch.

2. Draw the three views of an 18 mm diameter 70 mm long standard bolt with hexagonal head. The shank has a square neck and half of its length is threaded. Take the pitch of the thread as 2 mm.
OR
A flange of 500 mm dia and 50 mm thickness with 150 mm hub is connected to a shaft of 200 mm dia through a round key of 50 mm dia. Draw the elevation with upper half in section and side view full in section.

3. Figure 1 shows three components of a cotter joint. Assemble and draw the elevation with upper quarter (front) in section and side view full (choose 1/2 scale).

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OR
Draw the plan and elevation of a double rivetted double cover joint with the following specifications:

Plate thickness 22 mm

Cover plate thickness 18·5 mm

Zig-zag rivetting with pitch 140 mm

Back pitch 65 mm

Margin 43 mm

Rivet hole dia 28 mm

Rivet dia 27 mm

4. Write short notes on any two of the following:

Lathe Tail Stock

Safety Valve

Helical Gear

Surface Modelling