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Instrumentation Interview Questions
Questions Answers Views Company eMail

TEMPERATURE VARIATION FOR FREQUENTLY.

TVS,

1127

why we set -10 volt in vibration sensor output,why not +10 volt

Sabic, TVS,

3 21146

How does a strain gauge measure pressure?

2 3895

How can corrosion alter the accuracy and precision of a C- Bourdon tube pressure gauge?

1 2128

How do bending tubing provide better measurement than using tubing fittings such as elbows?

995

How to get Cv of control valve having following parameter ,i.e inlet pressure 4.5kg/cm2 outlet pressure 1 kg/cm2 specific gravity 0.808

3 4718

how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?

1038

why generation of syncronized generator increases when frequency of grid is less then 50Hz & generation decreases when grid frequency goes up from 50 Hz, as comparision with set value entered in govering panel?

1 2409

Can anybody tell me application of PLC,DCS,SCADA.

Reliance,

3 6320

Hi..i am B.E. (elect.&comm.)..i m workini in a bio mass power plant as inst. Engg. I want 2 know about growth in big power plant sector..is this field is good 4 me ..i m electronics engg..? Plz plz reply..

Reliance,

2 3750

modbus and profibus communication difference?

1 8600

how does we calibrate a square root flow transmitter ,give an example and explain it step by step like range calculation , calibration hook up series connection , zero check , and how to apply pressure , and if not geting proportional output then what should we do ?

4836

In control valve there are two type of valve seat we can use metal to metal seat & soft seat.On this valve seat i have following doubt. 1)I have never seen practically the internal assembly of valve so my doubt is that basically weather the seat is soft seat or metal its basic MOC is same as valve body(SS or CS) only in soft seat we are using PTFE ring & place on valve seat & in metal this PTFE ring is not threr am i correct??????? 2)what are the common general rule for using metal to metal seat & soft seat,means its depend on process parameter like liquid,gas, steam & on valve leakage class.

1 1312

In case of Transmitter's(e.g.Ultrasonic Flow meter ) we have an normal practise of selction of upstream and downstream distance such as (20D and 5D ).can anyone please let me know whow to calculate "D" ?? i guess it refers to pipe thickness is t right ?

2 2858

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

L&T,

1421


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Un-Answered Questions { Instrumentation }

Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

1294


What is difference between ESD and PLC please Explain me clearly.

3842


when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

1280


SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

1492


Explain the difference between plc and cnc?

167






types of cable..? Use of every types of cable..?

1113


Describe how to use megger to measure the earth resistance and insulation resistance

1219


what is exact time to study dcs and plc cources

1123


give eg of how I/P is used in control loops

1094


I am manjunath having exp in maintenance of chemical plants,know i want to do a design course INTOOLS,after doing design course can we get jobs in design field.sinve i dont have design exp..

927


dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.

933


How RAL(Rotary air lock)works in cement industry?

1447


Hi i am aneesh, done btech in applied electronics & instrumentatiin. And then i took mba in finance & marketing.After that i got placement in finance co and worked there for 3.5 yrs.Now i wanted to come back to engineering job.But without engg experience, i may not able to find an opening.i have done a course related to flow meters and ite calibrations. Kindly suggest where should i try to get a job?

1087


What is upsampling and downsampling?

3151


how works encoder in plc

1133