Mechanical Engineering Questions

 

·       what is COC

·       What set pts to be changed for N2 plant - design mode to max liq mode

·       What is FRC & what is the safe limit

·       Differences between ClO2 and NaOCl

·       Different types of traps used in OMPL

·       Available trips in GTG and set points

·       Available trips in UB and set points

·       Boiler Feed water working philosophy

·       Deaerator inlet flow valve 30 % and 70 % working

·       What are the imp parameters to check in cooling tower fan

·       List out the dampers available in CPP

·       What all analyzers available in OMPL

·       How fuel centrifuge works

·       How silica analyzer works

·       How Sodium analyzer works

·       What are Isochronous and droop mode

·       What all protections available in Liq N2 tanks

·       Differences b/w IAPA comp. and N2 plant comp.

·       Classification of Pumps

·       OISD checklist points

·       what is CFE and CFO (Environment)

·       What are the stages to obtain approval from IBR

·       What all statutory bodies/clearances req. for OMPL

·       What are SMPV Rules and Petroleum Rules

·       What is N-1 philosophy in OMPL Boiler

·       How to detect the chlorine vapors

·       What are the different types of chlorine dosing mechanisms

·       What is the shutdown sequence if a boiler trips

·       How Boiler is different from HRSG in all respects

·       What is pinch point and approach point

·       What is the purpose of alkali boilout, passivation

·       What all are the dosing chemicals used in OMPL and their purpose

·       Difference between fan, blower and compressor

·       What are the pre-start checks of a compressor

·       What are the pre-start checks of a centrifugal pumps

·       What are the pre-start checks of a reciprocating pumps

·       How the relative humidity affects Gas turbine performance

·       What are the different types of bearings. Classify based on requirement.

·       Differentiate between Steam Turbine and Gas Turbine

·       How to calculate the efficiency of Overall CPP

·       Why nitrogen blanketing is required for fuel tanks. How the n2 requirement varies based on climatic conditions

·       What are the different types of tank constructions and their uses

 

·       What is water hammering?

·       What are the available tests to check pH?

·       What is turbidity and what is the cause for it?

·       Differences between COD and BOD?

·       Differences between reactive silica and colloidal silica and their effects?

·       What happens to the turbine blades when silica is present in the dm water?

·       What is the limit for storing inergen cylinders inside the plant without any PESO approval?

·       What are the limits to consider a pipe line or a tube to be IBR?

·       What is the difference between a tube and pipe?

·       What are the advantages of using Natural Gas over HSD or LSHS?

·       What are the different valves that you encountered till now?

·       During HCl filling in the tank, HCl fumes will generate, what are the means to absorb these fumes?

·       Why PVC balls are used in DM water tank?

·       Which has a higher COP, Vapor compression or vapour absorption?

·       What is flocculation?

·       What are the effects if minerals are present in DM water?

·       What is the function of anthracite in a water treatment plant?

·       What is the effect of free chlorine on resins?

·       What are the different losses in a cooling tower and what is their percentage

·       What is the difference between Furnace oil and LSHS?

·       What is the function of Tatory stripper in Process Plant?

·       What are the checks to be performed before starting a motor?

·       What is the maximum NOx level permitted?

·       What are the factors that affect corrosion?

·       What are the factors that influence scaling?

·       What are the factors that influence fouling?

·       What are the various types of cooling water corrosion?

·       What are the ways and means to control corrosion?

·       Why clearance between impeller and back plate needs to be maintained, what happens if it increases or decreases and how is it measured?

·       What all are the types of level transmitters available?

·       What all are the types of flow transmitters available?

·       Bicarbonates of Ca & Mg are responsible for  _____________ and chlorides, sulphates & Nitrates of Ca & Mg are responsible for  ________________

·       What are the steps to be followed in gun cleaning activity?

·       What are the methods of Boiler preservation and when are they preferred?

·       What is the material used for cold insulation?

·       What are the steps followed in Laser alignment?

·       What is the equation for temperature and pressure compensation for flow calculation?

·       What is the low level alarm set point for Deaerator?

·       What is fuel gas minimum pressure control loop in boiler?

·       What is the minimum capacity of a hydrocarbon tank required for PESO approval?

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