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What is the air fuel ratio for idling speed in S.I engines?
Explain vacuum induction melting?
What is calibration of an instrument?
carnot cycle has maximum efficiency for ?
What is the metallurgical explanation of effects of chromium, nickel, molybdenum, and carbon in stainless steels?
What Is cold working of metals? Give some of its principal methods.
how would you find out the type of stailess steel that has been used to make your dish?
What is the difference between diagrams of it and ct in heat treatment of steels?
What is iron ferrite, define what is it used for, and where is it found?
The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing
Define grinding.
For the same part, it is possible to Specify the two different type of Hardness with same scall(EX-Quenching and tempering==>450 to 500HV30 & Hardening and Austempering 330- 380HV30)
What are allotropes?
How is metal heavy?
1)We are using OHNS material for manufacturing Thread & plain Gauges.What is the excat composition of OHNS for Gauges? 2)Which is the reference standard book for OHNS Material composition for Gauges?
