Answer / kumar

Differential pressure : input pressure - output pressure
Delta pressure : pressure drop

why is an oxygen sensor used in a boiler stack

2 Answers   HCL,

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how to wire from pressure transmitter to marshalling panel and panel to controller and controller to dcs plz give the answer with example .

2 Answers  

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in my plant 100% feedwater control v/v is air to close but due to instrument air fail,the valve opens but instead of drum level high its get tripped in low low drum level.the urv of level tx is 0 and lrv is -800.pls tell me the reason. for such behaviour.

1 Answers   Sirpur Paper Mill,

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tell about various protocols used in different plcs

3 Answers   Emerson, Samtel,

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what is the diffrence between plc&dcs

4 Answers   HCL, Hindustan Zinc,

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what's the reson that,Load is not same on VFD I/P and O/P Side.whenever DOL condition load is same I/P and O/P side.

2 Answers  

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What is profibus?

0 Answers  

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What is an antisurge control system, how it works?

3 Answers  

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What is SCADA ? WHAT is it role in DCS ?

3 Answers   Honeywell,

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i have an interview in Qatar Petroleum. So please provide the all details abt fire & gas systems

1 Answers   Qatar Petroleums,

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whatis diference between zero pressure and obsolute pressure

1 Answers   ABB,

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why 4-20 mA in covection system?

3 Answers  

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