Metallurgy Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Metallurgy Interview Questions

Questions Answers Views Company eMail

What kind of shell systems are used for investment casting?

2 4860

Why are the superalloys used for land-based turbines?

1 4027

What kind of components are fabricated from the superalloys, and what are their roles?

2 4379

What kinds of NDT methods are available?

10 18217

Why is non-destructive testing necessary?

9 17134

What are the superalloys?

3 9122

What are the superalloys used for?

2 5866

what is the cause of attenuation due to powerloss

1 4697

what happens when a EM wave is transmitted

1 4965

Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

1 4394

What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.

3 6217

i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect

IOCL,

3012

what are the ores of copper?

4 7380

I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C.

Novellus,

2440

any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material.

Novellus,

2325

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Un-Answered Questions { Metallurgy }

In grey iron sulpher was above 0.15% what react on metal?

1099

Define what is the strongest metal?

1025

Define knurling.

1202

Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know

2086

Which type of welding is used for welding of duplex and super duplex steel?

970

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?

992

difference between sand casting and shell casting

1791

Give example of heterogeneous systems.

1069

Explain the purpose of riser?

1089

How much gold is in a troy ounce?

1043

Define boring.

1214

A plain carbon steel contains 45 wt% of proeutectoid ferrite. What is its average carbon content in weight percent? I know that you need to use a tie line in the phasediagram, but my book does not really give a good example to go by?

1202

Does the extrusion process for a355 and a356 alloy have any impact on the impact energy?

1029

Define what is the melting point of e70 steel, 304,308,316 stainless steels? In addition, define what is the hottest part of the flame in a fire?

1110

What is impact energy?

1005

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