Instrumentation Interview Questions
Questions Answers Views Company eMail

How to calibrate the control valve.

1 4519

Please asked me How calculate DCS controller memory.

Yokogawa,

2328

What is open loop and close loop?

L&T, Pearl Distillery,

4 9836

In Safe Guarding test what means by "Failed to Danger" ?

Optimal,

1646

How to calibrate level switch?

Power Plant, Sabic,

2 11849

we are using centum vp as monitoring with Dell precision work station T3600 but some times PC(s) are restarted automatically . how we can solve this problem? thanks

Oil India,

1745

how many type conductivity sensor ?

Process Automation,

1620

Hi i am aneesh, done btech in applied electronics & instrumentatiin. And then i took mba in finance & marketing.After that i got placement in finance co and worked there for 3.5 yrs.Now i wanted to come back to engineering job.But without engg experience, i may not able to find an opening.i have done a course related to flow meters and ite calibrations. Kindly suggest where should i try to get a job?

Qatar Petroleums,

1528

How many mode are in ups?

2 4403

Where we cant instal mass flow meter.

1 4488

What are the difference between mass flow meter, magnetic flow meter and vortex flow meter.

1 8523

What is the three element? And how it work?

1 5438

Why we use 3-15 psi air for control valve input?

2 22318

what is rtd

Petrofac,

4 8142

Why we use 250 ohm resister in series hart communicator?

Thermax,

3 14232


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Un-Answered Questions { Instrumentation }

Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?

1340


How digital input and digital output 's are working in dcs

2024


HI friends.I am Surya a BTech in Electronics and Instrumentation Engineering.I am going to appear Relince Industries Ltd all India writen test very soon. so plz help me by sendind the probable questions about my subject.My mail ID is surya.barik@gmail.com.

1769


What is the use of control cable?

674


1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling

1947






Name different parts of a pressure gauge. Explain the use of hair spring in the pressure gauge.

657


how to calibrate load cell

2305


in mass flow meter what is drive friquancy ?

1611


Why not come out analog output in ABB EL3020 when display show correct value

647


can any one tell me when ongc placement test and its forms is available????/ pls tell me if u know

1617


What is Alpha & Beta fctors related to Orifice Plate & its relation with flow?

2921


How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

1617


Why mmwc unit is used?

752


What are the interlocks we have to check during the start up of LP/HP compressor?

1479


what is The specifications for oriface instalation

1599