STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
Give the classification of forging and Explain open die forging.
6 M
1 (b)
In casting experiments performed using a certain alloy and type of sand mold, it took.
155 sec for a cube-shaped casting to solidify. The cube was 50 mm on a Side.
i) Determine the value of the mold constant in Chvorinov's Rule.
ii) If the same alloy and mold type were used, find the total solidification time for a cylindrical casting in which the diameter D = 30 mm and length L = 50 mm.
155 sec for a cube-shaped casting to solidify. The cube was 50 mm on a Side.
i) Determine the value of the mold constant in Chvorinov's Rule.
ii) If the same alloy and mold type were used, find the total solidification time for a cylindrical casting in which the diameter D = 30 mm and length L = 50 mm.
6 M
2 (a)
Explain in brief permeability test for moulding sand.
6 M
2 (b)
Differentiate between direct and indirect extrusion.
3 M
2 (c)
Calculate the drawing load required to obtain 30% reduction in area on a
12mm diameter copper wire. The following data is given:
6o=240 N/mm2, 2α=12° and u=0.10.
6o=240 N/mm2, 2α=12° and u=0.10.
3 M
Solve any one question from Q3 and Q4
3 (a)
Explain various types of flame used in gas welding.
6 M
3 (b)
Write short note on transfer modelling and blow molding.
6 M
4 (a)
Explain in brief thermoforming process.
6 M
4 (b)
Explain the plasma arc welding in detail.
6 M
Solve any one question from Q5 and Q6
5 (a)
Write short note on progressive die and combination die.
6 M
5 (b)
A cup 5cm in a diameter & 7.5 cm deep is to be drawn from 1.5mm thick drawing sheet with a tensile strength of 315N/mm 2 the corner radius is negligible determine:
i) Blank diameter.
ii) Number of drawing operation.
iii) Force and energy for the first draw with 40% reduction.
i) Blank diameter.
ii) Number of drawing operation.
iii) Force and energy for the first draw with 40% reduction.
7 M
6 (a)
Define spring back and explain how allowances may be made to
compensate for its harmful effect.
3 M
6 (b)
Write a short note on strip layout.
3 M
6 (c)
Find the centre of pressure for given fig.
7 M
Solve any one question from Q7 and Q8
7 (a)
Calculate the gears and sketch the gear train for cutting 1.5mm pitch. It
has double start right hand treads on a lathe 6mm pitch of lead screw.
Available gears are 20 teeth to 120 teeth in steps of 5 teeth.
7 M
7 (b)
Explain the following operation with the sketch (any three):
i) Chamfering.
ii) Knurling.
iii) Grooving.
iv) Threading.
i) Chamfering.
ii) Knurling.
iii) Grooving.
iv) Threading.
6 M
8 (a)
Why chucks are used? List various type of chucks and explain any one.
6 M
8 (b)
Calculate the machining time for following given date:
Diameter, D = 100mm
Cutting Speed, V = 50 meter per minute
Length of workpiece, L = 400mm
Feed, f = 0.4 mm/rev
Diameter, D = 100mm
Cutting Speed, V = 50 meter per minute
Length of workpiece, L = 400mm
Feed, f = 0.4 mm/rev
4 M
8 (c)
Write a short note on apron mechanism.
3 M
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