PTU B.Tech production 3rd Sem Paper 2012 Manufacturing Processes

PTU B.Tech production 3rd Semester Paper 2012 Manufacturing Processes Punjab Technical University Exam 2012 3rd Semester Manufacturing Processes Test September and March Question Paper Free Download Punjab Technical University Manufacturing Processes Question Papers 2012 PTU B.Tech production 3rd Sem Question Paper 2012 for all students Previous Year old Past Papers of PTU B.Tech production 3rd Semester Paper 2012 Manufacturing Processes Punjab Technical University September 2012 and March 2012 Exam B.Tech production 3rd Semester Sample Model Question Papers Free Download PDF

Manufacturing Processes

a) What are the effects of mold materials on fluid flow and heat transfer?
b) Explain the difference between short and long freezing ranges.
C) Are External chills as effective as internal chills? Explain.
d) Why can blind risers be smaller than open-top risers?
e) Whit are similarities and difference between consumable and non c_ isumable electrodes?
f) Explain why some joints may have to be preheated prior to welding?
g) Explain the draw backs of riser being too large and too small.
h) .Why does porosity have detrimental effects on mechanical properties of castings?
i) What is meant by solid stale welding?
j) Why quality ofweld is produced better in submerged arc welding?

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