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<div><br /></div><div>moulding sand¸ fluidity of metals, risers, External chill, Internal chill, gating system dimensions, directional solidification process, vecuum moulding process, aluminium casting, casting process, contraction of the metal, skin effect, Rate of solidification, Factors on which the nucleation depends, Applications of shell moulding,Swelling of casting.</div><div><br /></div><div><br /></div><div><br /></div>
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Roll No........................... 'i Total No. of Questions: 08] (^) [Total No. of Page~: 02'..... -
(Please fill this Paper ID in OMR Sheet) 1\1. Tech. METAL CASTING (PREIPE - 501)
Attempt any Five Questions. All questions carry equal, marks.
Ql) (a) Discuss the different ingredients of moulding sand. Also compare these ingredients with the ingredients of core sands. (b) Discuss in brief the influence of clay content and percentage of tempering water on the strength of a moulding sand.
Q2) (a) Explain how nucleation occurs and grows in the freezing of the ptire metal. (b) List and discuss briefly the factor that affects the fluidity of metals.
Q4) (a) Discuss: (i) External chill. (ii) Internal chill. 'The use of internal" chill. is more" suitable than external one'. Explain. (b) Discuss all the formulas used to calculate the gating system dimensions. (c) Give a short review about the directional so1idification process. Discuss how the directional solidification can be controlled.
QS) (a) Discuss the vecuum moulding process. ~(b ) Compare die casting and full mould process from the point of process,
; Q6) (a) What are the different suitable casting prc,:>cessesused for brass metals, justify your answer..