Answer / alaa

by coating the liner with noncorrusive material

What is endurance limit and what is its value for steel ?

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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 there is a requirement of centrifugal fire pump with casing HIgh tensile strength, then what should be the material for pump casing.

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what are the different types of pump-sets available?

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what is the function of platern water wall in a boiler? and difference between with ordinary water wall?

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how the efficency of a coupling is calculated?

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What is critical temperature in metals ?

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how calculate the bearing number from inner and outer dia of bearing

0 Answers   Devashree Ispat,

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Explain the types of sensors.

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In a Waste heat recovery boiler feed control valve is after the economiser where as in auxilary boiler feed control valve is given before the economiser.why?

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Hello sir i had completed my BE in production engg.After diploma in mechanical engg.now i want to do BE in mechanical engg.that is double degree.Anyone can please tell me is there any provision to do this and how much is course duration.

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We have 6-axis wotan horizontal milling & boring machine. Linear axis- x,y,z,w & U. Rotary table B Axis Z,U & W axis are parallel. Z is tool axis. X is cross slide. We wish to retrofit the machine.Which control I should select & also suggest How many axis simutaneous control for linear & circular interpolation.

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