Instrumentation Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Instrumentation Interview Questions

Questions Answers Views Company eMail

what is the difference between E/P positioner and I/P positioner in control valve , in which application the respective positioner are used in.

ABB,

1 6510

Which is your favourite subject & explain any one topic of it.

L&T,

9597

Which topics are covered in Process Control?

Honeywell, L&T,

2159

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

L&T, Oil India,

1 7807

Tell about your IFFCO plant visit.

L&T,

2077

Explain Three way boiler.

L&T,

2 7286

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

L&T, STS,

2513

Explain any simple temperature control system.

HGJ, L&T,

3 8822

i want to calibrate a transmitter in the range of -100 to 300 mmwc. How it is possible to measure -100 to 300?.

Hindalco,

2 5801

what is the difference between mmhg & mmwc?. i want to calibrate a transmitter in the range of -100 to 300 mmwc. Which is the reference for calibrate the Tx,if mmwc not available?. Is it mmhg or mmho2?.

UPL,

3 49261

What are the two program execution modes of PLC?

4 8743

What are Sinking and Sourcing IO Cards

2 7442

why using negative supply for bentley nevada vibration system ?

2140

in transmiters(rose mount) how to check output 4-20ma ? and input 24v? i need exact explanation?

Adhunik,

2 7851

what is diff b/w neutron and ground?

3 6984

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Un-Answered Questions { Instrumentation }

What is Span Error

690

What is the Working principle of Dozing valve?

2209

Using your own examples solve a problem involving normal table. (experimental method and analysis)

1160

what is orfics working in main steam line. is it increase pressure, velocity of steam flow and dicrease steam flow rate. or any other

2187

I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

1987

hello can yoy pls send me previous papers of jindalpower and steel ltd.....'m from instrumentation..... mani1048@gmail.com

1997

Which type of diaphragm use in costic line, dm water line, natural gas line, oil line?

1166

PT RTD Range: -200 to 500 degree celsius If I configured in DCS Lower range and Upper range . In face plate it shows red colour due to overa range how was the characteristics look If the temperature is more than operating range. how was the characteristics look . whether its in Resistance vs Temperature curve is Linear or Non linear

1958

Explain the burnout feature.

976

How to Calibrate Ultrasonic flow Transmitter in Field

1269

how to rectify the poor signal strength in utrasonic digtial flow meter ,model:ge digital xce868i

1263

how u choose thermowell lenght n pnumatic C/v size?

2108

why Fahrenheit unit of moistur analyzer transmitter

2237

How to interfacing microcontroller with a DC motor

2058

How to Calibrate Level Switch in field

1336

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