Interview Questions
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1.)What are two essential conditions of perfect gas ?
Ans: It satisfies equation of state and its specific heats are constant.
2.)Under what condition the work done in reciprocating compressor will be least ?
Ans: It is least when compression process approaches isothermal. For this purpose, attempts are made to cool the air during compression.
3.). What is pitting ? How it is caused ?
Ans: Non uniform corrosion over the entire metal surface, but occuring only in small pits is called pitting. It is caused by lack of uniformity in metal.
4.)What is caustic embrittlement ?
Ans: It is the actual physical change in metal that makes it extremely brittle and filled with minute cracks. It occurs particularly in the seams of rivetted joints and around the rivet holes.