why we are using -24 vdc in plc?

1 Answers   CGL,

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Difference b/w SCADA & DCS

8 Answers   Siemens,

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dear friends pls tell me how temperature compensations are done in bourdoun tube of pressure guages thankx

1 Answers  

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What is the difference between instrument earthing and normal earthing? and why is it necessary to do so?

3 Answers   Atul,

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What is governor of turbine?

3 Answers   Reliance,

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selection of the zener barrier for the hazardeous area zone 0

0 Answers   Siemens,

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Can anyone send most commonly asked interview question in Oil & Gas industry

0 Answers  

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Can anyone provide me the details of GAIL test paper?What is the format and what type of questions will be there? my id-princegnb@gmail.com

1 Answers   GAIL,

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Could anybody pls give ans of boiler 3 element control system?

5 Answers   Qatar Petroleums,

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units for vibration in power plant

1 Answers  

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Why we use 250 ohm resistor in series with HART protocol communication?

13 Answers   Chemtrols, Instec, Sabic,

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1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?

0 Answers  

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