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

Instrumentation Interview Questions

Questions Answers Views Company eMail

if we mount flow tube in arrow direction then flow comes in negative & if we mount it another direction then flow comes positive,So what will be the problem

2 4882

if tx. dp increase or decrese what happend in the reading

BSP,

1 5119

how can calibrate vacume trasmitter by HART COMMUNICATOR ?

Bajaj, IMECO,

3 7472

What's the difference between cold loop test and hot loop test?

5 43647

Can we calibrate an actuator?

Siemens,

5 12618

What is Cu-100 and Cu-1000 ? and tell me its application ?

2 6842

why we cant transmit the dc current easily

1 5161

What is the Temperature Co-officient of Resistance of PT- 1000 and PT-2000 ?

Adani, Birla, MEIL,

2 9347

Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

SCS,

2 7167

ABB DCS (AC 800 M)redundency take howmany milliseconds to switch from master controller to slave?should be less than DCS scanning time?

SCS,

2 6274

A DP Endress and Hauser flow transmitter is always tripping pump at low flow. set point is 74 cubic meter/hr. Thorough impulse line flushing and zero calibration has been done, yet problem persists. What do you think is the problem and how do you rectify this fault?

5 8107

how works encoder in plc

2075

Explain the usage of the PLC system?

3 6668

Explain the difference between the types of input variables plc?

1 4826

Is an analogue only transmitter as accurate as a smart transmitter?

SCA,

2 5101

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Un-Answered Questions { Instrumentation }

I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

2270

If we increase only P what will be controller action ?

2469

What you mean by multi stage control vavles?

1812

I will attend an interview with GasGas company for a position of Instrument Technician ( Offshore )in next month can anyone tell me what questions they will ask. Thanks in advance.

2084

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

4044

What is standard procedure of manual mapping in Radar type level transmitter?

1950

Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com

2257

how many type conductivity sensor ?

2050

how will you segregate the alarm levels in alarm management system during factory Acceptance Test

2386

what effects a surging can produce in the compressor

1918

what is span value and zero ? and how set ?

1572

what should he know if he is an assitent engineer instrumentation in cement industries of experience of 10 - 15 year.

2097

what is the difference between active & reactive power?

2198

Can anybody tell me which type of question are asked in the interview for the FORMULATION(Pharma) as a instrumentation engineer, & question in building managment system.

2014

Do you have reference list?

1838

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