Instrumentation Interview Questions
Questions Answers Views Company eMail

how control valve works?

Qatar Airlines,

7 24833

Can anybody tell me how to select the size of earthing cable for DCS & PLC system.Please tell me any relevant answer here or mail it to me.

Essar, Sail,

1661

Can any body give detail about orifice sizing?

Essar,

5 8236

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.

Sabic, Saudi Aramco Shell Refinery Company SASREF,

1844

how to callibrate a new i/p converter

TATA,

7 11804

defination of plc? why we use plc? application of plc? advantage of plc?

4 19712

what is plc? Basic function of plc? application of plc in industry? What is lader diagram ? What is the main advantage to use plc in industry?

Schlumberger,

15 101864

what is the difference between RS 232,RS 485,RS 422, how they different from each other

TCS,

15 42286

HOW TO CHECK THERMOCOUPLE AND RTD & WHAT IS THE DIFFERENCE BETWEEN THERMOCOUPLE AND RTD

14 94873

A differential transmitter is calibrated to measure the flow of lquied, explain what wil happen if the fluid is not pure but contains some bubble?

2 5866

Sir i am studying M.sc,(Tech.)Electronics and Instrumentation in Andhra university.What is the offers for me?

4 6882

how to check thermocouple ,its working or not?

Coca Cola, Ford, Honeywell,

14 47730

we have a s-5 simense plc having op7 .recently on op7 showing error 1.plc not present 2. DB error frequently. can u have any solution . please send me.

2130

What is the difference between HMI and MMI?

16 37663

why bevelling is done in an orifice ?

ABB,

4 8510


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Un-Answered Questions { Instrumentation }

what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?

2038


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

1653


selection of the zener barrier for the hazardeous area zone 0

1755


please someone tell me what is function of vibration sencer and how many types and how to control viberation.please. my id is jimmykhan077@gmail.com

1339


Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

1036






Which types of quections asked in interview for FORMULATION PLANT (PHARMA)

6199


Make Heater Process Logic.

1617


What is first echo & echo window in radar type level transmitter?

1255


dear friends, i have seen flow as the selection critriea in presure guage (bourdon tube) and i would like to know what is the relation between flow and performance of pressure guage other parameters i found in the data sheet are pressure max. 1ksc temperature max. - 50 deg c line size - 80NB operating range - 1ksc pr. guage range - 0-2 ksc thank u,

1706


while i check zero check for dp flow transmitter some fluctuating came (0 to 458 kg/h) what is the reason?

1318


KAlman filter code for two dimension?

1591


control panel design guidelines

2835


types of cable..? Use of every types of cable..?

1570


how to calibrate load cell

2295


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?

1595