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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 6999

Tell about your IFFCO plant visit.

 1642

Explain Three way boiler.

 2 6389

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

 1868

Explain any simple temperature control system.

 3 7614

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

 1870

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

 11 38010

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 7891

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

 1846

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

 3 9302

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 7101

how to replace the smart transmitter software

 1 3023

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 9690

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

 1795

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

 2014

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Un-Answered Questions

how to pass interest on security entries and salary payable entries in tally and how to maintain e-commerce company account please revert me ASAP its needful for me

873

How will you decide whether a customer will buy a product today or not given the income of the customer, location where the customer lives, profession and gender? Define a machine learning algorithm for this.

107

In what ways do production engineers contribute to sustainable manufacturing practices and reduce the environmental impact of production processes?

1

block diagram of 2 ups system connected in hot stand by mode?

7488

what is the last book you read?

631




What is flow decision in uipath?

181

Can vendors be replicated in the org plan ?if yes, how? Is there anything special about it?

453

Does wordpress cms allows the use of multiple language to cater regional people?

106

When do you use template-driven vs model-driven forms? Why?

448

Explain your strengths in terms of this job profile.

650

Where is regression in excel?

269

Tell me who are the founders of google?

64

Define PRIMARYLANGID(), SUBLANGID(), and MAKELANGID() macros?

2198

explain all the status of an incident in maximo?

5

Linked lists -- can you tell me how to check whether a linked list is circular?

641