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 Differance between Graphics And SCADA Graphics? SCADA Graphics have less access?

Honeywell, Thermax,

3 9297

what is the difference between auto tuning and manual tuning of controllers(eg:PID,PI,PD CONTROLLERS )

GATE,

2 12293

Why hunting will occour in control valve?

6 47163

what is meant by Valve reversibility?

2 5489

what is meant by turn down ratio?

Avant Garde,

3 11725

what is IPS (instrument protective system)?

2 14582

how to calibrate control valves & power cylinders & ultra sonic level transmitters

ABB,

2134

how to know power plant process with corresbonding laws&thoeries

Bhel,

1 5795

for indiacation of turbine(china) bearing temperature what type of sensor will be used(i.e. rtd or thermocouple or themister ) ? why it is ? i need clear explanation ?

2 6244

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 .

1975

Why all the drains(Gland sealing,ESV,Casing inlet etc) are directly connected to the flash tank instead of hotwell of the condensor in the power plant? My Email Id:naba02222@gmail.com

ABB, Jindal,

2293

define SIMULATION a and what is the need of it

Siemens,

3 9113

define COMPENSATION??

Bosch,

4 8556

what is radar type level transmitters and its basic principle and how to calibrate it

ABB, Inovonz,

4 20759

Can combine control system for Emergency control system (ESD)and Fire & Gas System ( F & G) is possble to built and offer to client? Can such system is as per Norms in India?

1994

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Un-Answered Questions { Instrumentation }

For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

5464

Decibel.

2554

What happen if we install my pressure transmitter below the elevation of pipe in natural gas service?

1066

Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

2303

What is the meaning of wet leg

1256

what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.

2248

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.

1910

What should be the main consideration while starting the Rotating compressor when we dont know the cut in and the cut off pressure setting of the pressure switch

2219

What is the use of temperature compensation?

2016

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?

1875

Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..

4260

Why trim span ? How?

1612

Draw a group of instruments interlocked to a Pump & Motor?

1297

Tr. Wiring for calibration.

2073

How to calibrate displacer type level transmitter (chemtrol make )for level measurement in hotwell , LP & HP heater ?

5914

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