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

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 3722

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

5 9759

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.

2862

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.

2476

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

India Cements,

2417

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

1 14068

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 5708

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

3395

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 3509

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 7569

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,

2181

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 7127

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

3 8494

What is the difference between dry contact and wet contact?

2 16086

What is meant by Fail Safe Condition in PLC?

4 16254

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Un-Answered Questions { Instrumentation }

What is difference between ESD and PLC please Explain me clearly.

4958

Explain about the leakage class of the control valves

2040

what is the process to make control schematic ?

2281

Any one can help me to identified, how can we interchange the device in FF

2840

why we are not using the turbine flow meter in the steam service?

2262

IS there any effect of vortex in low pressure side of the transmiter after the orific in feed water line? if yes then what is the calculation?

2457

What are primary elements of measuring pressure? Which type of pressure can be measured by these elements?

1100

HOW CREATED LP & HP PRESURES IN DRUM FOR DRUM LEVEL MEASUREMENT!

1918

What is the use of temprature compensation?

1227

what is the difference between active & reactive power?

2263

How to interfacing microcontroller with a DC motor

2115

What is super thermocoupal?

2273

Name different parts of a pressure gauge.

1182

what is IEC code in cables & how to selecting cables?

1896

What is the purpose of LO Overhead tank in turbines.

2049

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