Instrumentation Interview Questions
Questions Answers Views Company eMail

What is the difference between HMI and SCADA?

2 6470

What are the disadvantages of Human-Machine Interface (HMI)? atleast 3.

1 18667

How to zero trim the level transmitter by using foundation fieldbus communicator.

Emerson,

2 11487

why we use only 4 to 20ma other than 0 to 16 ma

Invensys, Systech,

5 7946

I am new in work for 1 of our project we have some instrument in BOM including Pressure, Temp. and so on, I also noticed some objects like pressure switch process HOOK UP; which I don't know what does "HOOK UP" mean here.

3 4658

Describe a time when you anticipated potential problems and developed preventive measures.

Hotel Management,

2476

what is the difference betwwen the 2wire level transmitter and 4wire level transmitter??and their applications also??

2 6064

when an eddy current probe is installed inside of a turbine or compressor in case of probe problem same as:crash of head of probe,changing the scale factor because of low measuring gap(physical gap is ok(example=1.14mm)but voltage is reduced(example=-6 volts),is any way to check the probe,when the ohm of probe is ok.thank you,(Karim Tavakoli)

1 2089

How it the difference between force balance system and dispalacement balance system?

1585

What is the difference between antisurge

1 3793

In vortex flow meter how can measure the frequency of vortex generated by vortex flow meter

Cadila,

4 8388

Hi buddies! i am facing a problem and if someone could help me it will be an immense pleasure to me. we have compect logix PLC 1769 2L AO module to Heat @ 52 to 56 Deg C .So if anyone can do please help me out with this problem.I'll be highly grateful.

Cadila,

1 2896

During the design and engineering of a process plant, a good designer should plan for ____________, ___________ and ____________ aspects of the plant

1 3065

Isometric drawings are generated during _________________ phase of a project

1606

Isometric drawings are generated during _________________ phase of a project

1604


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

which type of signal used in instrument?

8562


We are using Rosemount 5400 series Radar Level Transmitters in all types of Sump Applications having oily water hdrocarbon petrochemical nature. What we are facing the problem frequently is that always getting reading frezzed at some value. If we do power recycling , sometimes it is working . then making same freezing problem. If anybody faced before such type of problem and also having solution , Please give the answer.

1746


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?

1567


Any body have know try work calculation ???

977


What types of Instrumentation Related Questions can an Interviewer ask in a Telephonic Interview ?

2033






WHY THE DEGREE OF VALVE PLUG AND VALVE SEAT IS SLIGTLY DIFFERENT I CONTROL VALVE TRIM DESIGN

1538


in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.

2276


what is the minimum power (P=VI)to produce a spark?

1548


State four different types of flow measurement, for gas flow measurement MMSCFD is the common unit expand the unit and specify significance of word S in the unit.

1529


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?

1770


(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

3429


Instrumentation symbols interpration, P& ID, Logic diagram analysis, Electrical drawing analysis.

1479


SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

1911


Explain the use of hair spring in the pressure gauge.

652


Manipulation of dead wt. tester double piston type.

1495