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

Instrumentation Interview Questions

Questions Answers Views Company eMail

what is the diffrence between plc&dcs

HCL, Hindustan Zinc,

4 9552

what are the basic instructions used in simatic s7-300 plc?

Dr Reddys, HZL, Siemens,

5 11143

What is the deffernce bet. Instrumentation and Electrical Enginerring?

1 4583

How many types of Control Modes in process control, plz tell me all.....?

2 11284

purpose of absolute ppressure transmitter applcation?

1 4907

difference b/w single acting and double acting actuator by using application only?

McDermott,

2 38237

what is absolute pressure and where use in process?

3 8628

i have one tank of 500mm height, which is in under vacuum of 735 mmHg, I want measure level of the same using DPT , SO WHAT WILL BE THE URV & LRV, DENSITY OF THE TANK FLUID IS 0.95. is there necessary to fill the LP side with fluid.

7 16526

WHAT IS THE DIFFERENCE BETWEEN A TRANSMITTER & A SMART TRANSMITTER.

8 42341

what is Potential free contact? where it is used?

Engineers India Limited,

3 32539

how to calibate level transmiter ?range -150 to +150.what is the zero and span?

1 7379

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 11432

can any one pl explain me in brief that how we select the leakage classification in valve,means for liquid or gas there is any standard for selecting leakage classification or its depend upon valve size or any any other parameter.

3 5628

Foe selecting control valve if i have the min,normal & max data of flow rate,inlet pressure& outlet pressure,inlet tem.&density than how can i assure that these data are correct,pl. let me know if therew there is any method to check it.& also how we assure that the Cv we get from this data is suitable for valve for controlling require flow.

HPCL,

3 8064

Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com

IOCL,

2223

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Un-Answered Questions { Instrumentation }

How works weighfeeders in cement industry? what is the working principle?

1969

Explain types of valves?

1017

Explain operation of Haskel pump.

2068

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

1883

KAlman filter code for two dimension?

2015

in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.

2753

I have a Control VAlve having size of 2 ".Only the known parameter is Pressure drop . Its 2 Kg. Then How to calculate control valve sizing means Cv.

2303

what is the PC interface and software for connection to ABB logic module “ LM011-CE18RAC “ ( for Programming ) ??

3951

How it the difference between force balance system and dispalacement balance system?

2048

Why the ammonia and Nitric Acid level indicators is with millimeter ? and What is the conversion form millimeters that level indicator indicate to weight ?

1753

what is function of SCADA , and how is it work, explain with difination

2299

What is the cascade control

1373

What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.

2174

what is zero and span ?

1606

How to Calibrate Radar Level Transmitter in Field

1186

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