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Answer Posted / harish
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i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect
We make aluminum moulds by press casting, can you suggest any thing so that the moulds should shine after casting?
where do i get previous question papers of metallurgy?
When we do cardonitriding or casehardening operation for a plain carbon steel the case depth, hardness & microstructure are not alike why and what are the basicthing, which makes such a difference.
Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?
Throw some light on hardening abilities of metals?
Explain heat treatment of brass?
How is solution annealing carried out? Define what type of furnace is required? Does one need to be heat in a salt bath?
what medal conducts heat best?
In welding, arc is too long due to ?
You are required to calculate a heat affected zone in weld. How would you do that?
Define what is the different between ferrite percentage and ferrite number?
Differentiate between 304 and 316 grades of steel?
Where is iron ferrite found?
Define what is the metallurgical explanation of effects of chromium, nickel, molybdenum, and carbon in stainless steels?
