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Instrumentation Interview Questions
Questions Answers Views Company eMail

How to make position transmitter feedback reverse i.e at valve close i want 20ma output and at full open 4ma.for the NELES positioner,model:ND8261/TS1.

3 4528

what is the difference about HART, and 4-20mA signal?

8 33232

plz give me the logic for how a pushbuttoon can be worked as atoggle switch i m working with allenbradely/micrologix1200/rslogix500

3 4141

Why we use 4 to 20 mA, (This is International Standard) instaed of this can we use 4-16, or 4-24 or 3- 15 or any other range

ONGC,

13 26478

what is the advantage by using PID controller than P& PID?

1 4479

An electronic p controller has an input range of 1-5v, and output range of 4-20mA, while testing a step change of 0.4 was applied at the input , the PB setting was 50% ,what should be the change in the output ?

Reliance,

1 4039

what is an ambient temperature?

Reliance,

5 8289

what is the function of a diaphragm?

1 4727

why we use negative 24vdc to a proximeter

KNPC,

4 9022

What is mean by AC voltage and DC voltage

2 5130

what is the difference between DELTA-V & FOUNDATION FIELD BUS

4 8953

Hi buddies! my name is sachin and i am working as a electrical and instrumentation engineer in a paper plant. right now i am facing a problem and if someone could help me it will be an immense pleasure to me. i am using AC 800M to synchronise DCS500 drives on paper machine and rewinder.communication is on PROFIBUS and we are using NPBA-01 module to link profibus to DC drives.But these days two of these drives are showing a error named FIELDBUS COMM.TIMED OUT and the drives get tripped.I have changed the NPBA module and PROFIBUS cable.So if anyone can do please help me out with this problem.I'll be highly grateful.

1274

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.

Reddy Labs, ScienceWay,

1163

how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

Yokogawa,

1 5426

what is difference between total flow and flow rate in general ?? explain it with daily life example.

GNFC,

3 18842


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Un-Answered Questions { Instrumentation }

What is ultrasonic flowmeter?

200


Can please tell mi about SIOS, PRM, SERVER, and what is the diference between PIN LAN, PCS LAN,APC Server, and please send the Doc if possible for referance,mail id patil_amit17@yahoo.com

950


What is 1:1 redundancy ?

1387


How the sizing of the analog signal cable is calculate?

1455


What happen if I install my pressure transmitter below the elevation of pipe in natural gas service?

225






Specify eight technical requirements that you would consider important, when deciding upon a particular control valve?

1050


why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

1365


In apron feeder how TPH is calculated?

736


How to erection of DCS Panel at site step by step

543


How is PH sensor works ?

1029


what is the calibration procedure for transweigh make weigh feeder?

2292


how to work static pressure sensore how to work dpt

1043


Why all the drains(Gland sealing,ESV,Casing inlet etc) are directly connected to the flash tank instead of hotwell of the condensor in the power plant? My Email Id:naba02222@gmail.com

1465


Why mmwc unit is used?

249


Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows

1094