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

Instrumentation Interview Questions

Questions Answers Views Company eMail

PID controller is used for which type of compensation…… a) lead comp. b) lag com. c) lead lag com.

Engineers India Limited,

12 23597

Induction type 1-p wattmeter reads ….. a) true value b) apparent value c)volt ampere value

Engineers India Limited,

3 8564

How much voltage we get between two wire of 4 to 20 ma output? Is this voltage up or down respectvice to 4 - 20 ma ?

9 14484

which type signal come control valve

6 10722

which type signal in & out in dcs

4 15650

Why we use 250 ohm resistor in series with HART protocol communication?

Chemtrols, Instec, Sabic,

13 58355

I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1895

1.what is the role of proportional comtroller in pid controller?2.How do u calibrate the control valve?

Bently, IOCL,

3 11209

Why only negative 24 vdc supply give in vibration measuring system.

6 17672

why 1 to 5 vdc is used for output measurment

4 9275

if we have 380 KVA DG. how to calculate Power Factor. With detailed formula

1 6318

How to calibrate the magnetic flow meter and how to correct the flow if it is showing more flow.

Bohra Industries Limited, TCL,

5 28016

In electronic board one fuse(rating 230v,100ma)showing 2.5 ohms with multimeter,then the fuse is healthy or not.

4 7603

Which softwere is required to communicate the S7-300 processor

4 8425

What is the difference bitween control net scaner and device net scaner

Binani,

3590

Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

which type of filter gives the constant phase characteristics?

1924

I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

1794

Linear amplifier.

2016

what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

2034

What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)

2108

In which principles tx ,pressure gauge,Temp gauge,control valve works?

1819

what is effect of specific gravity in differential level transmitter , explain formula related with this .

1650

Can anybody please let me know Orifice plate sizing calculation formula and step by step procedure

1994

What is instrumentation technologists and mechanics?

970

anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me

6030

what is SIL 1 2 3

2037

why we r opening HOT BYPASS valve during startup of a compressor?

2094

How to convert Differential pressure to flow in TPH

2234

give some question relative instrument fitter?

6263

what do u mean by compensation n pid tunning?in pid tunning what you tunned?is it possible 2 tune p i d

5398

For More Un-Answered { Instrumentation } Questions Click Here