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Instrumentation Interview Questions
Questions Answers Views Company eMail

Sir, my yokugava FF TYPE LEVEL transmitter us bad, i don't have spares available, i want to replace it with a Rosemount FF transmitter, please tell me what procedure to be followed and what changes to be done in dcs part.

BPCL Bharat Petroleum, OEG,

1 2587

In my plant I want to mount a steam flow transmitter .Flow nozzel is already mounted in steam line .So how can i know the range to put in flow transmitter?

1 1521

What you mean by multi stage control vavles?

1193

Can we get the outpot in c without using getch fiction? Answer is yes but output will stay on display 4 only few second.... But can we get output without using getch and also output will hold on the display...?

1 1730

Why we. Don't measure current in parallel? Why we measure current in series and why we measure voltage in parallel only?

Almeer Technical Services,

2 3856

if found error in magnetic flow meter?how can we adjust?

ANI Instruments, Techint,

2 2719

what is mass flow meter, working principle of mass flow meter and its installation.

2 2553

I have one problem for masoneilan displacer type LT.I give some imformation in data shéet given for liquid level range 0 to 600 mm and sg .955 problem is 0% is ok 25%(23%) or 50%(48%)and 75%(73%) and 100% is ok this is up value and down value all ok so please halpe me

Hyundai, TATA,

2 3592

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?

Almeer Technical Services,

1410

my temperature transmitter in field showing 700 degree , whereas in dcs showing 459 degree, how to resolve this?

ONGC,

4 4525

Controller not working in auto mode?...what are the problem can occur...Pls explain

Aramco,

1 2817

Yokogawa mass flow meter shows negative reading...what r the main causes for this problem?...

IOCL,

3 7752

How does temperature bath work? How does coil gets heated only by applying some current?

Process Control Technologies,

1175

In bimetallic temp. Gauges why does metal strip bend? Why do we use low expansion factor metal and high expansion factor metal in bimetaliv strip?

Process Control Technologies,

1 2001

In control valves (like feed water control valve) we will give 3 kg pressure and how it controls 110 kg of water pressure?

SSL,

4 3611


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Un-Answered Questions { Instrumentation }

1- Explain about HPM 2- What is the FSC and explain the configuration of FSC 3- explain the complete loop of vibration, how it works (field to control room) 4- What is the use of proxymitter? 5- During job your partner effected with H2S then what you have to do. 6- what type of gland packing uses when valve glind is leaking.

2153


please send the sample qustion paper for iocl written test ..

3115


installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

1475


How can you add value to this Industry if offered the job?

1025


Can I calibrate the Electromagnetic Flow Meter on line and How.

1236






How to interfacing microcontroller with a DC motor

1072


PT RTD Range: -200 to 500 degree celsius If I configured in DCS Lower range and Upper range . In face plate it shows red colour due to overa range how was the characteristics look If the temperature is more than operating range. how was the characteristics look . whether its in Resistance vs Temperature curve is Linear or Non linear

1371


steps for installing orifice plate?

1191


Introduce yourself which is not present in your biodata?

1744


how to calculate signal cable sizing? and multipair cable sizing??explain in brief?

1730


how to calibrate steam control valve in steam turbine

2604


What is wet leg condition and why is it used?

1374


how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???

1795


Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?

1395


What is difference of fanuc alpha series 16i and 18i controller.also what is differnce betn TC and MC controller

1686