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 23613

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

Engineers India Limited,

3 8572

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 14490

which type signal come control valve

6 10724

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 58365

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 11213

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

6 17676

why 1 to 5 vdc is used for output measurment

4 9280

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 28022

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

4 7610

Which softwere is required to communicate the S7-300 processor

4 8437

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

Binani,

3590

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Un-Answered Questions { Instrumentation }

field bus transmitter calibration procedure tell me

1829

How to Calibrate Interface Level Troll in field

1366

Name different parts of a pressure gauge.

1126

What is the cascade control

1419

How earthing can be checked????

2406

TEMPERATURE VARIATION FOR FREQUENTLY.

2048

what is the process to make control schematic ?

2247

Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

2183

What is the calibration procedure of Drum level transmitter if range is 0 to -400 mmh2o in lab?

2107

i am preparing for BARC ,so plz mail me how to prepare for BARC. ALSO IF POSIBLE SOME RELATED QUESTIONS. MY MAIL ID IS khushi_4uall2003@yahoo.co.in

3010

How the sizing of the analog signal cable is calculate?

2528

IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?

2227

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

2225

What is first echo & echo window in radar type level transmitter?

1691

in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?

3179

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