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Instrumentation Interview Questions
Questions Answers Views Company eMail

how to measure low temperature(<100 dec celsisus) with non condact sensor

2 5618

Could anybody pls give ans of boiler 3 element control system?

Qatar Petroleums,

5 13749

how to check the leak in thermowells

1 7258

If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

Essar, Reliance,

2381

which processor is used in dcs.

ABB, Wave Distillery,

2251

how to do loop checking pls email to shanavaska2000@yahoo.com

Kentz,

2 9816

what step is taken for ESD ( emergency shut down) in DCS REPLY to hashimka20009@gmail.com

Bosch, Eskom, Sabic,

2323

What is the working principal of Mass flow transmitter?

1 9258

I have one DP transmitter of range 0-500mmWC i have to calculate its range in M3/hr for flow measurement so whats the formula.

ABB, TICB,

4 15321

1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?

2230

Please anyone answer my question, what is the difference between single acting and double acting control valve, in what condition we better choose single acting rather than double acting

2 7720

In Increasing temperature why thermocouple used and RTD is not used. Both RTD and Thermocouple have in Range of uses.

L&T,

5 14652

what is commisioning procedure,2)what is is the main work in commisioning in the field tx to dcs, plz send me detail

2304

Can we place a Control Panel in Hazardous area Group IIC ? If 'yes' then is there any approval required? If 'yes' then there is any specific IP rating or any standard required? If 'Yes' What is MOC of control panel?

2 5662

How to check range of DP Transmitter

7 13654


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

What is the difference between working pressure and calibration pressure of a control valve

3066


what is zero and span ?

1662


In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

2068


why using negative supply for bentley nevada vibration system ?

2140


How to calibrate radar type level transmitter for interface level? Total liquid(liq.1 and liq.2), level both the liq individually? For. Both the liquid levels how the signal will go from transmitter to dcs? How to calibrate. Single radar 9:26:55 AM for 2 different liquids in a tank?

2339


Why are the uses 24vdc in industries

1012


Reason for capillary type dp level transmitter fluctuation

1980


May I have a brief note above the voltage barriers? Whats is the purpose? Please mail me if you've operational details, mail id: rajkumar.diice@gmail.com

2130


for oil & gas industries which zone is normally preferred? why? give its example?

1991


What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).

2147


List three types Level Gauges with their working principles

2084


What is the purpose of the analyzer in petrochemical plant?

3872


Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

2116


What is the basic difference between Modbus and CAN Open Protocols

6440


How does work A temperature valve or fv control valve in process plz brief me

2446