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

Instrumentation Interview Questions

Questions Answers Views Company eMail

If we increase D what will be the controller action?

2 5622

Can anybody explain what is the different between ESD & PLC

ADCO,

1 3167

what are the possible reasons if a control valve fails to open/close?

DEWA,

1 7343

Can anybody explain about wellhead control system.

1 2886

What is the different between ESD & PLC.

1 6750

why temperature transmitter is showing ambienttemp.but 21.5ma. alarm AO showing at the display &how to sloves this problem.

2 6060

what does mean by analog output trim and where this one used for?

1 8535

Which boiler is use in power plant

Jindal,

1 5500

what sud u do if u dont get feedback from control valve?

Siemens,

1 7451

what is difference between positioner and position transmitter in control valve

2 15342

suppose, after calibrating a transmitter we fixed it in a process line. At live zero condition the Tx shows 4.5 mA. what should we do to make the Tx show 4 mA? If we adjust zero, will it not affect the calibration?

ABG Shipyard,

4 7987

Sitrans LR460 Radar level transmitter getting level out or disturbed level during moisture present in the material ie coal in the pccb bunker in CHP.Any suggestions for this problem...????

ABG Shipyard,

1 4601

Explain , how timer based pneumatic control valve will work ?

1 3603

what are the documentation and instrument identification system used to identify the correct device to be calibrated? name atleast three.

1 7016

please someone tell me what is function of vibration sencer and how many types and how to control viberation.please. my id is jimmykhan077@gmail.com

1833

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Un-Answered Questions { Instrumentation }

Basically iam Instruemntation Engineer, but Iam interested in Instruments design engineering, so plz guide, is there any course, training or Softwres to become Instrument design engineer??.

2050

What is Positive Calibration and Negative Calibration?

2246

What is the meaning of wet leg

1250

Exothermic reaction./ endothermic reaction

2034

What are different types of orifice plates?

1188

What is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

1911

how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?

3663

pls give me presant awerness quistion and answer in my emailid.

2866

1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

2684

what is orfics working in main steam line. is it increase pressure, velocity of steam flow and dicrease steam flow rate. or any other

2190

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.

1894

How many are the types of instrument cables in terms of No. of pair.

2193

what is exact time to study dcs and plc cources

2048

Definition of reverse and acting controllers:

2322

What is ultrasonic flowmeter?

1110

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