Instrumentation Interview Questions
Questions Answers Views Company eMail

What is trim material . Why it is known as trim.

L&T, LNG,

1 5720

I saw one P&ID 6" control valve has been connected with 8" process line, and 2" valve also connected in parallel with 6" valve. why the 2" valve connected in parallel, Is there any technical reason. please clarify. With Regards-Kittu

GNFC,

5 8551

i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me

ONGC,

3 10050

how many types of thermocouple cable are? give the name of each type.

Fabco,

1 6076

what should be minimum length and size of impulse line for steam flow orifice and feed water orifice? asked by sanjay parihar

Birla,

1 6070

why we use 4-20 mA for calibration of the instruments.why we cant use 0-20 mA?

5 9434

principle of automatic votage regulator

Bhel,

1684

how to test rotor &stator earth fault in turbine

Bhel,

1 11486

what happens if we are having very very high cavity and flashing in a control valve..??? is it stops working...immediately... or eroded...slowly

2 4790

what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 20721

what is the standard of determining opening/closing time of Motor Operated Valve?

1 4474

what is a mapping in plc & dcs

Arctern, ARM Cement,

1 11433

can anyone can let me know in Eurotron Micro cal 2+ calibrator in milli amps source mode we are not able to get 20 milli amps output it only produces 1.52 milli amps out, but display shows increase in milli amps , and err6 displays, let me know how to remove the err 6.

1763

What is a PID controller and how can it to applied to our everyday life?

4 23419

If mVolts can drop by resistance of wire as compare to mA, then how thermocouple mV reaches in CCR as accurate value?

7 8257


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Un-Answered Questions { Instrumentation }

please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826

1642


when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?

1316


How many interlocks at turbine side?

1447


What are de-saturators?

743


WHAT IS TMXT IN TEMPERATURE FOUNDATION FIELDBUS.

1876






which processor is used in dcs.

1837


Basically iam Instruemntation Engineer, but Iam interested in Instruments design engineering, so plz guide, is there any course, training or Softwres to become Instrument design engineer??.

1585


Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

1644


How to calculate P,I&D value in PID controller ?

1638


what are the diff. in servo and regulatory control?

3480


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

1877


what is instrument philosophy

1768


what are procedure of sox-nox calibration

2452


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


what is piezoelectric transducer?give an example in power plant n state its principle?

2092