GANDHI INSTITUTE FOR TECHNOLOGICAL ADVANCEMENT (GITA), BHUBANESWAR

Sub. : B.M.P. 4th Semester, B.Tech.(M.E.) Full Marks : 30CODE:PCME4205 CLASS TEST I Time:1 Hr.Instruction : Answer any three questions including Q.1.- Give brief answers to Q.1.– Give

Suitable figures/sketches wherever applicable-Marks allotted at RHS margin.Q.1 Answer any five of the following: (5 X 2 = 10)

a) What is the difference between moulding sand and backing sand?b) Differentiate between chills and chaplets.c) What precautions must be taken during ramming the sand while preparing the mould?d) What is the function of a riser?e) Which binders are used in shell moulding?f) What do you mean by a core?g) What is meant by the double shrinkage allowance?h) How the clay content of a sand sample is determined?i) What is the benefit of using the metallic pattern?j) Name four important properties of the moulding sand.

Q.2 a) Write down the advantages, limitations and applications of casting. (5)b) Briefly describe the general procedure of sand mould making. (5)

Q.3 a) Name various pattern materials used in the foundry with advantages (5)b) What is machining allowance? How is it reduced? (5)

Q.4 a) Compare between green sand moulding and dry sand moulding. (5)b) Why the investment moulding is known as the lost wax method? Write its advantages and disadvantages. (5)

Q.5 a) Write down the difference between pattern and casting. (5)b) Write down the functions of pattern. (5)

Q.6 a) Write short notes on: i) Sweep pattern and ii) Gated pattern. (5)b) Differentiate between Single piece pattern and loose piece pattern. (5)

Q.7 a) What is cupola? Name its parts and show them through a neat sketch. (5)b) Describe the operation in a cupola stepwise and identify its various zones.(5)