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Instrumentation Interview Questions
Questions Answers Views Company eMail

what is the differnce betweeen hart and smart tx

3 5337

pls any1 sugges me book for plc,dcs & scada..

1 3324

procedure to commission a drum level transmitter

1 6226

Whether the DI, DOs shields can be connected with Analog Input Shield Earthpit?

969

Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 3093

WHY WE WILL USE 0-24VdC IN ELECTRONIC CIRCUITS AND INSTRUMENTATION TRANSMITTERS?

Aban Power, Jindal, JSW, Sugar Factory,

3 9397

what is 24vdc live and dry supply

1354

What is the reason for not giving very High Proportional Gain Kp in PID Controller?

ABB,

2 6113

What is the basic difference between Modbus and CAN Open Protocols

5244

If a differential pressure transmitter is calibrated for 0~2500 mmH2o and transmits a 4~20mA dc signal. The transmitter is placed across an orifice plate which is sized to create 2500 mmH2o differential at 5000m3/Hr a) what is the flow rate when the transmitter signal is 13.0mA DC? b) what is the signal output of the transmitter when flow rate is 2500 m3/Hr ?

5 20648

what is the diffrence between pressure safety valve & pressure relief valve....pls

Oil India,

1316

why relays are used with plc?

4 17989

how to make a calibration for differential pressure

2 4784

what is virtual instrumentation

1442

what will be the output of the temparature transmitter if temp is 120 degre celcius.

Base Automation, NTPC, PDO,

1 2173


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Un-Answered Questions { Instrumentation }

State some of balance principle’ advantages?

218


what is cold loop? difference between hot and cold loop?

1255


Any body have know try work calculation ???

552


Dear Friends, we are planning to design Power distribution and Fiber optic in the same cabinet.Like Front side Fiber optic and Rear side Power distribution.Is it any possibility of problem occurs like interference etc? Your answer is highly appreciate.

1288


What is Positive Calibration and Negative Calibration?

1278






What do you know about gail?

1541


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

771


can you send remote seal interface level transmitter calculation steps for oil water saperator.

1673


How we calculate orifice plat size???

546


I want measure the volumetric flow of gas in waste heat recovery Boiler?Tell me how and which type of instruments required. Plz mail me:naba02222@gmail.com Sam please post the answer .

1118


any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

1572


you are on site,the plant trips,you are approached by operations,what do you do?

1313


In my company plc based winders are operated. one day there was a data transmission failure alarm shown on pc. as per sir instruction we have reset master plc but winders were not triped and alarm gone. so what master plc do?

1042


What is sensitivity in vibration probes..?

575


what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?

1625