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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 7012

Tell about your IFFCO plant visit.

 1647

Explain Three way boiler.

 2 6400

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

 1880

Explain any simple temperature control system.

 3 7658

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

 1874

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

 11 38076

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 7900

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

 1854

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

 3 9329

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 7120

how to replace the smart transmitter software

 1 3034

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 9717

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

 1805

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

 2024

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L&T Instrumentation Interview Questions


Un-Answered Questions

Difference between save() and saveorupdate() method of hibernate?

166

1. what is IDOC monitoring ? what is the tcode used for idoc monitoring ? 2 . what is change pointer in ale ?

6657

What are the integration differences between sps 2003 and the various office versions?

419

What is the difference between a shallow copy and deep copy?

451

Can div have id and class?

456




How many maximum slots we can use in ESMA card?

1597

How is measurement of ph made?

588

Why do we need dagger 2?

488

What is a start routine and return table, how do they synchronize with each other?

62

What is net dynamics application server?

473

What are packages in pl sql and also explain its advantages?

536

When jsessionid is created?

609

Which type of video formats are supported by html5?

445

When columns are added to existing tables, what do they initially contain?

633

How do I copy an entire mysql database?

479