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Instrumentation Interview Questions
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What are the charcterstics of a P&ID controller block for Governor speed raise or lower for a load sharing functionality between 4 Gas turbines in droop mode.

TNPL,

2484

what are the steps to commissioning a DCS system?

BGR Energy,

2 15576

what is orifice plate? Give me best answer?....plz

 5 9810

Can we use twisted pair cable instead of ethernet for communication?

Yokogawa,

1 7096

How does a redundant controller comes in line when the main controller fails??

Yokogawa,

3 8260

DCS marshilling Cabinet Power supply can be replace during plant running time?

 1 4281

Why do we use 24V DC supply in instrumentation? What are its merits and demerits??

JSW, MJPRU,

1 8738

CAN WE CALIBRATE LEVEL TRANSMITTER USING HART COMMUNICATOR WHEN WATER LEVEL IS PRESENT IN THE BOILER SHELL?

Chemin, Emerson,

4 9215

pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.

Siemens,

2654

what is compensation in engineering and what is temperature compensation?

Binani, Yokogawa,

1 4770

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.

 2214

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.

JSW,

1881

what is the Difference Between Domain and Station?

Emerson,

3 9419

how to calculate density?

 2 4609

How to check vortex flow meter is in good condition while we do not having calibration setup?

 4 7490

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Un-Answered Questions { Instrumentation }

how to design orifice plate?what is the equation?

1621

How signals can be taken through modbus?

678

can we create an interrupt in plc through scada?

1887

what are the diff. in servo and regulatory control?

3464

how is work pressure switch& level switch?what is the principle of this?

2127




What is heating effect?

1868

A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

873

What is the differerence between hysterisis and linearity.

1814

give me the formula for analog to digital converter and also d to a converter

2353

what is the imbustion control loop

1427

what is temperature compensation?

4772

 why Fahrenheit unit of moistur analyzer transmitter

1779

Hi, I am Newely Joined in Construction company instrument engineer? Any one can Plz tell me How can I advanced preparation for Releated Engineering and construction Documents?

2147

IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?

1751

Identification of ss fittings, pilot valves, relief valve.

1383

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