types of stainless steel.why does this called stainless.what is passivation related to SS? What is sensitisation in stainless? Examples of diffrent type of steel e.g. austenatic,martensite,ferritic etc. 304,303,316. How to get rid of carbide formation in SS and stablization in SS.(347 etc.)Different type of heat treatments. Iron carbon diagram. Nelson chart with respect to corosion. Diffrent type of corosion and causes. Carbon equvalent number. Welding related questions.(requirement of post and pre heating in welding). welding of SS. If you have pre experience in maintenance then Material and welding related questions will be there. Then various types equipment in plant (a) static (b) rotatic in pumps and compressor,turbines funda of balance drum and balance disc, balancing line. Impulse wheel, wheel chamber pressure and its effect on turbone health if this increases. Thermal expansion of turbines and with respect to how foundation bolting are designed. Fixing of lower casing before dismantling. Most important shaft alignment and balancing of rotating equipment,classification of static and rotatic equpment used in process plants. Materials for diffrent services as refinery plants fertilizer plants, cement plants, sulphur plants, crude oil with higher sulphur services, then third important thing is codes, standards and recommended practices of diffrent organisation like ASTM,ASME,API,TEMA,BIS,IS,ISO,NPFA,OISD etc. diffrent type of work permit systems fire and safety point of view.

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if power plant is running at normal condition. at that time accidentally turning gear motor or bearing lift oil pump came into service menas what happen to the system?

6 Answers   Emco,

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Why R12 refrigerant is restricted to atmosphere?

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What is pitting ? How it is caused ?

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How conduct the hydro & pnumatic tests of Pressure vessels as per ASME & as per EN Standerds.

3 Answers  

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Draw L.O. system in diesel engine?

0 Answers   RRB,

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Lowest temp in vapour compression cycle in :(Ans:Expansion devices) Contineous welding is type of :(Seam Welding) refrigerant in domestic Refrigerator:(R 134 A) Lowest critical temp of refrigerant:(Freon) Statement....this is .....law:(Avagadros law) Ratio reynold no to prandtl no is:(Pecelent no) if welding is done from right to left then what is the name welding:(Not known) slip gauges are made up of:(alloy steel) clearence between meeting surfaces is due to which gauges: question on rubby laser,rake angle,heat treatment processes,joules law,bell coleman cycle like a/c works on which cycle?

2 Answers   Hitachi,

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Contaminants of fuel oil

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hey have you knw the GI sheet thickness as per gauge?

2 Answers  

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What are the causes of dirty lubricating oil?

0 Answers   RRB,

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Why is over-pressurizing an air conditioning system bad?

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Company insists on a joining bond to protect the investment made in recruiting, training and mentoring employees. Are you willing to make this commitment ? -1 year for candidates > 5 years experience -2 years for candidates with 2-5 years experience -3 years for candidates with 0-2 years experience

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