Instrumentation Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Instrumentation Interview Questions

Questions Answers Views Company eMail

ORP sensor working principle?

Tata Steel Limited,

2012

what is the principal of operatio of dc motor

1 2313

How does your previous experience relate to the job you are applying for ?

2020

I am applied 100 % pressure on to the air to open control valve,but the valve is not fully closed..and 10-15% is open the valve. how to calibrate the control valve?

OPaL,

3 4307

how to turbine speed measurement?

Jindal Steel and Power,

1585

I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 3773

in yokogawa prosef rd safety PLC how to data send frome local SCS to other SCS and other FCS

2 3274

dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.

CPL,

1894

In apron feeder how TPH is calculated?

Lafarge,

1731

Flame scanner

1 2432

why fuse block is not used for AI signal?

1893

how can i calibrate the temperatuture gauge used by temperature bath(dry block) i mean step by step procedure?

Texas,

1677

how can i calibrate a smart temperature transmitter used by druck 720 process calibrator?

Texas,

1594

what is the calibration procedure for magnetic flow meter @ onsite

1655

Pressure tx shows 1 mbar but we need 1000 mbar at this process condition .. how can we sort it out .

1708

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Un-Answered Questions { Instrumentation }

what do u mean by compensation n pid tunning?in pid tunning what you tunned?is it possible 2 tune p i d

5400

What is instrumentation measurement?

1113

How we calculate orifice plat size???

1530

Why plc require in analog input 4-20amp & 0-10 volt?

1139

how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?

1887

protection relay watchdog contact operation?

1959

Specify for Cables - Flame Retardant and Fire Resistant?

2045

Explain bernoulli’s theorem.

1060

what is span value and zero ? and how set ?

1572

How earthing can be checked????

2406

How does a single acting, spring return ball valve actually work? Does it require continuous air supply?

2139

what is the process for double acting cylinder pneumatic for 32' v/v

2077

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,

2127

Can anybody tell me which type of question are asked in the interview for the FORMULATION(Pharma) as a instrumentation engineer, & question in building managment system.

2014

give eg of how I/P is used in control loops

1949

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