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

Instrumentation Interview Questions

Questions Answers Views Company eMail

whether radar level transmitter is applicable for the open tank

TCL,

1 4602

what is the difference b/w wet leg & dry leg level method

2 7443

what is LAS in foundation fieldbus protocol?

1 6802

WHAT IS AN INTERLOCK SYSTEM ?? HOW THEY WORKs ?? WHERE IT IS USED ??? MAINLY ??

TATA, Tata Steel Limited,

2 7875

What are the processes Variables?

4 6166

Define all the process Variable and state their unit of measurement. ?

3230

Explain, and give a real-world example of MODULATING control

1 5903

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

2322

Why would an Engineer consider combining FEEDBACK and FEEDFORWARD control in some applications?

Jindal,

4 8217

For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.

1926

Describe the concept of Gain Scheduling, as currently found as an option in some controllers.

1 4029

In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

2018

How can i copy program (parameter) from mm440 (V.F.D.) by using BOP?

2723

whatis range of marcury filled tempereture gague

Dr Reddys,

1948

What is require for PLC Programming?

6 15826

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Un-Answered Questions { Instrumentation }

How an rtd work, and what volts/current goes to a rtd to measure the resistance?

1275

flow transmitter formula?

2810

I have a Control VAlve having size of 2 ".Only the known parameter is Pressure drop . Its 2 Kg. Then How to calculate control valve sizing means Cv.

2351

I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1890

can u briefly explain aboutan aryton shunt multirange DC ammeter?

2739

How works weighfeeders in cement industry? what is the working principle?

2040

what is the input of digital counter during the the calibration time?

2313

what is performance test.need defination

1710

what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.

2345

Do you have reference list?

1833

why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.

2386

i have used level transmitter in starch cooking preparation tank. tank total height 2mtr.sometime LT display shows some error value when tank is fully empty and diaphragm side i already checked okay no problem in diaphragm area. field cable checked 24volt and mA shows correct value while tank empty mA is 4mA. 4mA i needed that 0% but display showing 10% or 15% percentage values are varying continously please give any good solution for me.....

1463

What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?

1977

How we calculate orifice plat size???

1529

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

3341

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