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L&T Instrumentation Interview Questions
Questions Answers Views Company eMail

Explain PID controller tuning & any one method used for it.

1 6076

Tell about your IFFCO plant visit.


Explain Three way boiler.

2 5310

Draw bode plot of any transfer function. Why is plotting bode necessary?


Explain any simple temperature control system.

3 5938

diff between neutral ,ground,phase , earthing and shielding?


how to derive kg/cm2 to mmwc? complete derivation.

11 32777

for commissioning the DPT and Flow Transmitter , what kind of necessary activities we have to check and do? specially that orifice flange valve[ isolation valve}

1 6744

a flow transmitter [range-0-400mbar] connected in process line. please explain me how to calibrate the flow transmitter , & how to do static error


In E&I diagram what is the meaning of rectangular box and circular box

3 7242

In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

6 5252

how to replace the smart transmitter software

1 2272

Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

2 7321

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?


For a diafhram 1.5 d =kn(p-p0) D4 Where d in deflection in inch k=constant n=no of capdule (P-P0)=Applied pressure in psi D In active dia at capsule. -1.5 d=k to p d being constant -1.5


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L&T Instrumentation Interview Questions

Un-Answered Questions

Discuss steam engines. What is its overall efficiency ?


What are the characteristics of personnel sub area?


What is the use of Sponge Tool?


Is wordpress secure?


What is a module in a course?


What is a filter hook?


List out the basic procedure for dispatching operations in capacity leveling?


How do you run a COBOL batch program from a JCL? How do you run a COBOL/DB2 program?


Which command is used to delete a package?


Suppose a user gave us a negative feedback on our Facebook page, how would you handle that?


What is oops with example?


What is Linux and why is it so popular?


What is green-shoe oprion?


What is t-tests() in R?


Where can the metastore database be hosted?