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Instrumentation Interview Questions
Questions Answers Views Company eMail

whats the problem will arrise if we rotate the hosing screw of the differential pressure transmitter?

 1 2842

how to rectify the problem ,if we erected the DPT instrument wrongly of hp on lp side and lp on hp side?

 5 7652

in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.

 2283

1)How many tpes of vibration probe and how many tpyes of vibration. 2)how we can calibrate a vibration probe with tk3 3)what is RMS value in vibration measuring application and how we calculate it.

 1880

In VVVF DRIVES VOLTAGE IS ALSO VARY WITH THE FREQUENCY. HOW? WHAT IS THE DIRECT FORMULA RELATING THESE TWO.

India Cements,

1889

Q- Why Phase tester is only used for checking AC not DC ?

 1 13195

Q- In the process of checking AC through Phase Tester our body is the part of circuit but we don't recevie Shock, Why ?

 2 4472

Q- What are the application in which PNP transistor is preferred over NPN ?

 2830

Q- Ordinary Water Tap is which kind of controller ? P , PI or PID i chose the option of ON - OFF type controller but ambiguity is that for different positioning of tap we get different flow

 1 2784

Q- Which of the following is Close loop system - a-)respiratory System b-)traffic light system c-)washing machine d-)Room heater my option is A, what is our take on option B & C

Sail,

4 5788

Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem

Sail,

1730

Q- voltage source of 12v is driving the circuit.if circut draw the current of 0.5A them source voltage will became 11.8v.what is the power dilevered by source when circuit draw 5A current ?

Ecil,

4 5169

Why Current(Ampere) is chosen as Fundamental Quanties not Charge(coulomb) ?

 3 7118

What is the difference between dry contact and wet contact?

 2 15092

What is meant by Fail Safe Condition in PLC?

 4 14409

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Un-Answered Questions { Instrumentation }

Displace type LT to be calibrated in workshop, wt. 40, dia- 60 mm, density- 0.8kg/cm3.

1428

how can use ram

1472

how to calculate control valve bonnet size?? or how to select its material?

1946

What is the difference between uv and ir scanners? and what is the workig principle of both

1935

why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V

1990




all types instrumentation questions want

1699

please send me the inteview questions in IOCL

1757

What is zener diode? What is voltage regulator?

633

Using your own examples solve a problem involving normal table. (experimental method and analysis)

675

Full form of KKS when use DCS.

2601

Explain an adaptive / self-tuning controller’s major draw card.

1850

Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

1649

how to calibrate load cell

2309

How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?

1592

What is the meaning of wet leg

669

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