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Instrumentation Interview Questions
Questions Answers Views Company eMail


2 4330

List three types Level Gauges with their working principles



List three types Level Switches with their working principles


List three types Level Transmitters with their working principles

ABB, Bapco Bahrain Petroleum Company,

1 2155

Difference between 2-Valve Manifolds, 3-Valve Manifolds and 5-Valve Manifolds 3 with diagram

Acire Systems,


y v r connecting 250 ohms resistor in series when u cummunicate with BT in bench calibration?

5 6089

diff bw range and span?

3 4789

plz tell me clearly about PID.."when v have to change I value,D value,GAIN??


what is output of FOUNDATION FIELD BUS transmitter


I work on a electronic positioner transmitter 4211 at the field.I connect my multimeter in series to get the current output then I calibrate it to 4ma in 0% of position of the valve and 20ma in 100% position of the valve.My problem is in the field I get the correct output current based on my multimeter but in the dcs they only receive 40% in a output 20ma of this positioner.Then I try to simulate in this analog card and they receive the equivalent percent on the value that I simulated.Is ther any possibility to reset the zero and span of this positioner 4211 fisher.And what other possibility I can do to fixed this.This is my email add ( )

4 7431

my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card


i have level transmitter -400 to 0 range for steam drum application but i am unable to calibrate if installation of lt below lower tap what will be the effect ? and as per std wht is location of lt ,above lower tapping or below

1 3422

WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem."

Khas Pvt Ltd, Yokogawa,

6 20433

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?



If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

Gujarat Fluorochemicals Limited (GFL), Shell,

2 11230

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Un-Answered Questions { Instrumentation }

please send the drdo exam paper


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


full process of gas turbin?


how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw


What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?


(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.


I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.


need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job




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?


Identification of ss fittings, pilot valves, relief valve.


What is difference between ESD and PLC please Explain me clearly.


how we are selecting instuments by differentiating certain instruments in 4 to 20 ma range and certain in 1 to 5 v dc


what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?


what is the importance of CV in the control valves? how it is calculated?