Instrumentation Interview Questions
Questions Answers Views Company eMail

why 4-20 mA in covection system?

3 6090

What does a hookup diagram look like? can you give sample drawing. thanks.

1 7528

what is the use of glycol filling in seal pot (or) condensate pot in instrument impluse line?

7 39503

how do i tune dearator pr control valve using PID. we set the set point is 0.6kg/cm2 now i want 0.5 to 0.7kg/cm2 limits so what should i give p,i,d values. then pls explain how do set pid values for control valve tuning?

SEWA, Sharjah Electricity and Water Authority SEWA,

1458

how do i calibrate mmwc pressure guage with out calibrator.if any? pls give me the ans.

1 5275

Are Coils of Electromagnetic flowmeter in direct contact with fluid material

TATA,

4 6722

Please any one can explain how to calibrate transmitter (smart) online with out remove from the container suppose it is interface level or static pressure level measurement we dont want to remove transmitter from the container mean it is running plant please give me detail. thankx brothers

KNPC,

1 5478

how can we tune a PID. If it is by zeiger nichols method..please explain briefly with help of an example.

KNPC,

1987

In your own words, would you expect an ultrasonic level device to work better in a pressure vessel with a high pressure or a strong vacuum, and why?

1 4326

radial & axial vibration sensor output voltage is ac or dc volt?

Vedanta, Voltech,

8 13864

Why we are using reverse action in displacer types level transmitters on some Vessels?

2005

what is difference between accelerometer vibration sensor and proximity vibration sensor

3 23642

what is "smart" in smart transmitter ?

4 7904

What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?

Engineers India Limited,

1575

what is thermo coupler and how it works

Tisco,

2 4951


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Un-Answered Questions { Instrumentation }

Why humidity limit is 30 to 55 % for raw material storage?

3570


why is an oxygen sensor used in a boiler stack

6215


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

1699


Why is the orifice tab provided?

684


What is frequency factor in massflow meter? When using frequency output?

1297






In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

1492


What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?

2594


what is the importance of CV in the control valves? how it is calculated?

1939


How to do gas analysers calibration in AUTO and Manually by using zero and span gas?

1906


Somebody can explain me about >Critical Loops, calibrations, ESD critical Loop checks, Logic Diagram / Cause & Effect checks for ESD loops,

1219


What you mean by multi stage control vavles?

1358


How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System

631


how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?

1468


In VVVF DRIVES VOLTAGE IS ALSO VARY WITH THE FREQUENCY. HOW? WHAT IS THE DIRECT FORMULA RELATING THESE TWO.

1871


what are the use of belew gear in general ??

1534