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 23612

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

Engineers India Limited,

3 8570

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 14487

which type signal come control valve

6 10722

which type signal in & out in dcs

4 15656

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

Chemtrols, Instec, Sabic,

13 58364

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.

1902

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

Bently, IOCL,

3 11212

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

6 17676

why 1 to 5 vdc is used for output measurment

4 9277

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

1 6322

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

Bohra Industries Limited, TCL,

5 28021

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

4 7609

Which softwere is required to communicate the S7-300 processor

4 8435

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

Binani,

3590

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Un-Answered Questions { Instrumentation }

principle of dead weight tester ?

2072

Which is your favourite subject & explain any one topic of it.

9597

What are the error values can accepted in flow transmitter calibration?could u give any formula for this?

1909

How to convert mmWc(mili meter water colam) to tph(ton per hour)?

981

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

What is intrinsic safety mean.

1904

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?

2318

CONTROL VALVE OPERATING IN MANUAL BUT NOT IN MANUAL. WHAT SHOULD BE THE PROBLEM ?

1898

How to regulate the flow of Air in 4" line, with max flow of 330 nm3/hr and Pressure of 0.5 bar? please suggest the type of instrument required.

1508

What is the use of GMV in turbine?

4433

what is interface level measurement.who can calibrate interface level measurement transmitter online

2524

hi,i am doing 3 year in electronic and instrumentation engineering. what type of aptitude questions will be asked in a core industries and how can i improve my skills in instrumentation?

2102

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

1950

in valve is constructed as per SME B 16.34, then which standard is used for fire testing of valve?.

2026

is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?

2218

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