STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
Explain Lost-Wax casting process in detail.
6 M
1 (b)
A casting of 50cm ×40cm×10cm size solidifies in 20 min. Find the solidification time for 40cm×30cm×5cm casting under similar condition.
6 M
2 (a)
Explain wire drawing process with neat sketch.
6 M
2 (b)
Compare Hot working and Cold working process.
6 M
Solve any one question from Q3 and Q4
3 (a)
Explain blow moulding with suitable sketch.
6 M
3 (b)
Write a short note on extrusion process in making film and cable.
6 M
4 (a)
Describe oxyacetylene welding with neat sketch.
6 M
4 (b)
Why is coating essential on arc welding electrode?
6 M
Solve any one question from Q5 and Q6
5 (a)
Compare blanking and piercing operation.
6 M
5 (b)
Determine the material utilisation factor for producing 40 mm dia. circular blank from sheet of 3 mm thickness by considering allowances a=t+0.015*d and b=t. Sequence of blanks show in Fig. 1. Number of blanks = 5.
7 M
6 (a)
Find the centre of pressure for the following Fig 2:
7 M
6 (b)
Write a short note on progressive, compound and combination dies.
6 M
Solve any one question from Q7 and Q8
7 (a)
Draw single point cutting tool, also write down significance of different angles involved in the geometry.
6 M
7 (b)
A steel shaft of 75 mm diameter and 250 mm long turned on a lathe. Speed of spindle = 2 m/s, feed=0.25 mm/rev. Find time required for 50 jobs by assuming 2 minutes for handling of each job.
7 M
8 (a)
Explain different operations performed
5 M
8 (b)
Calculate the machining time required to reduce 60mm diameter shaft to 50 mm diameter for a length of 1500 mm and with depth of cut 2.5 mm for rough cut and 1 for finish cut. Given:
Cutting speed = 30 m/min. Feed = 0.5 mm/rev. Approach length = 5 mm, overall length = 5 mm. Number of passes = 3 (2 rough cut + 1 finish cut).
Cutting speed = 30 m/min. Feed = 0.5 mm/rev. Approach length = 5 mm, overall length = 5 mm. Number of passes = 3 (2 rough cut + 1 finish cut).
8 M
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