Instrumentation Interview Questions
Questions Answers Views Company eMail

I wnat to practice more online type questions .so will you show them me to take a practice test?

VA Tech Wabag,

248

what is span value and zero ? and how set ?

304

Who to difference between analog in & analog out in dcs?

320




need to calculate flow rate with the help of dp range and orifice bore dia and size. range is 0 to 400 inwc and orifice size is 12 inch 150 # rf and bore dia is 7.180 inch. need to calculation for flow rate

153

the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

255

What Is Pre- Commissioning Package +what is DCS & ESD Pre- Commissioning for Instruments Please explain your answer on practical ground base

162

How to decrease opening & closing time of on/off valve?

UPL,

285

Difference between guide wave radar & non guide wave radar ?

UPL,

1 383




Why flow/pressure transmitter before control valve?

UPL,

328

Relation in MMWC to Flow rate

1 360

is motorized valve closed when power shutoff?

Unilever,

324

What is three element in drum level?

238

What is 3 element control system

257

A valve in series with an orifice plate (DP transmitter), is aligned for constant pressure in the pipeline, if there is an error dx, How to align it in process.

156

A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

180


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Un-Answered Questions { Instrumentation }

What is the purpose of the analyzer in petrochemical plant?

2598


How to calibrate the flow transmitter

348


Why upper weighing limit of electronics balance is 90% of the total weighing capacity?

943


Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?

9051


What is the use of GMV in turbine?

1800






The Design Calculation of Level Transmitter For Different Structure open & Closed Vessel, Eg. Diff. Level Tx., Capacitance For Continous Operation

1619


i hav applied for the post of engg. in iocl so please require the past test papers fro instrumentation engg please please help me and send me the papers or tell me the pattern and type of ques asked in examination......

885


where are following valves are applicable to install. can any valve be installed any line. globe valve butterfly valve boll valve gate valve

557


how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

998


(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.

2452


describe flow nozzel principle?

1295


what is the current pay package for an instrumentation engineer having 2 years of experience in cryogenic technology???????

3294


anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me

4160


what is function of sensor, and how is it work , explain with difination

1109


Calibration of controller (pneumatic)

825