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 9765

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

Dr Reddys, HZL, Siemens,

5 11368

What is the deffernce bet. Instrumentation and Electrical Enginerring?

1 4692

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

2 11409

purpose of absolute ppressure transmitter applcation?

1 4998

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

McDermott,

2 38385

what is absolute pressure and where use in process?

3 8775

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 16819

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

8 42656

what is Potential free contact? where it is used?

Engineers India Limited,

3 32746

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

1 7458

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

2 11552

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 5765

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 8267

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

IOCL,

2306

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Un-Answered Questions { Instrumentation }

what are the different types of Protocols? & their applications.

30671

protection relay watchdog contact operation?

1957

How to calibrate smoke Dectector

1631

Explain PID, ON/OFF, Controls

2036

what is compensation? temprature & pressure

2016

Explain the working principle of lvdt?

1197

any questions on motor and energy conversions machines?

2232

What is the Working principle of Dozing valve?

2209

Hi, I am Newely Joined in Construction company instrument engineer? Any one can Plz tell me How can I advanced preparation for Releated Engineering and construction Documents?

2559

what is maxdna ?. explain about the software details.

4380

what is the input of digital counter during the the calibration time?

2316

How an rtd work, and what volts/current goes to a rtd to measure the resistance?

1277

what is loop1 and loop2 in MTS LT?

4657

what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.

2345

what is the reason while warning lamp is on while the engine is cranking?

2145

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