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Instrumentation Interview Questions
Questions Answers Views Company eMail

What is instrumentation control?

476

Explain types of valves?

504

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

474

What is the difference between mmwc and mmwg?

540

Explain the difference between mmwc and mmwg?

1888

Explain why use mmwc unit?

480

What are the types of valves?

456

Where is wet leg is used?

488

Explain the difference between differial pressure & delta pressure?

1 575

Define cryogenic?

513

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

477

Explain the difference between plc and cnc?

421

Explain the key components of control loop?

443

WHAT IS THE CAM POSITION IN CONTROL VALVE POSITIONER ? WHY IT IS USED?

402

how to do dynolab wind speed sensor loop test, how to simulate value,i have simulate mA 4-20mA but not responding in DCS faceplate, please kindly advice me any one.

425


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Un-Answered Questions { Instrumentation }

I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

1603


What is limitation of the ht.of the displacer of a level trol?

1638


How we calculate orifice plat size???

867


selection criteria of control valve? and selection criteria of actuator explain in brief?

3494


protection relay watchdog contact operation?

1403






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1299


How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

1498


What happen if I install my pressure transmitter below the elevation of pipe in natural gas service?

550


What is instrumentation instrumentation engineering?

445


Name different parts of a pressure gauge.

507


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

474


why I need valve guard and whats different between guard and positioner ??

718


how many types of preheaters are in cement industry & what r they can any body explain?

1169


Give 2 application of quartz crystal used for process parameter measurement.

1393


Why thermo wells are used? What materials are used in thermo wells?

489