Answer / siva varun

investment castings are used for casting high melting metals
to have zero allowances/draft(dimensional tolerances due to
shrinkage). Here the shell system used(mold) can only be
used once. The shells generally used are made out of wax.
The mould melts as the refractory metal solidifies.

Answer / swathi

sand shells

sir.I am OBC candidate,recieved scholarship/freeship during academic year 2011-2012,2012-2013(my yearly income was below 4.5 lakh).my yearly income during academic year 2013-2014 was above 4.5 lakh.should I get scholarship/freeship in academic year 2013-2014 ?

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