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

Instrumentation Interview Questions

Questions Answers Views Company eMail

what is vfd(variable frequency drive)?type of vfd.

2 5785

what would be the minimum flow rate that we can measure on rotameter..?

TATA,

2095

What is transducer

IFFCO, Jindal,

4 9613

how the flow rate is measured from a pipe with the help of pressure?

1 4797

If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used?

2 5393

On liquid service if PT Head is 18 meters. How much pressure will be exerted on it. If Transmitter is not in service?

1 4409

There is a problem with our HART475 it is not communicating with smart devices error becomes "NO DEVICE FOUND"we have insert 250ohm resistance as per requirement but invain plz tell me the solution?

1 7063

we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

1705

can any one explain in which term we are flow flow is it volumetric r is it mass? and y

1930

all questions related to instrument technician in any offshore oil and gas company.

21671

Questions on flow meters,few questions on HART protocol,

Monnet,

1993

few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters

Monnet,

2032

the whole paper was based on Transducers..questions like define repeatability, error,accuracy,precision..den there were many q. on the conversion of Pa to mmHg and other units.. also..der wer few Q. on some level sensors(with diagram)

GNFC,

2076

A motor is taking 15 Amps at no load and 60 Amps at full load. and a valve has to open 10% at full load and 80% at no load. How to draw ladder logic.(PLC).

2 6137

what is bevel? why bevel required in orifice plate?

2 32912

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Un-Answered Questions { Instrumentation }

why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

2225

How to Calibrate Vortex Flow transmitter in field

1269

What are different type of instrument cable

2271

How to calculate mmwc values into tonnes?

1258

what is span value and zero ? and how set ?

1568

Galvanizing.

1948

what is interlock system and why we use of this?

2034

Emergency Shutdown Systems/ Plant Shutdown System.

2267

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

2176

What is Positive Calibration and Negative Calibration?

2244

Please tell me details about Sox,Nox,SWAS analyser????

3726

Q-Explain the different load conditions that will produced different offset which may or may not be acceptable to thhe control function

2186

how many type of plug are used in pneumatic control valve,name them.

5435

How to regulate the flow of Air in 4" line, with max flow of 330 nm3/hr and Pressure of 0.5 bar? please suggest the type of instrument required.

1506

How digital input and digital output 's are working in dcs

2545

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