Answer / ahmed allam

if you mean protection of for example power plant
so the most important parameter is scan time of
the controller must be very fast so action be very fast

Can we measure pressure using differential pressure transmitter? If yes then how?

5 Answers   Reliance,

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why we use -ve voltage in vibration monitoring system.generally we use 4 to 20 mA as output of instrument then why we use voltage in vibration

2 Answers  

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Specify eight technical requirements that you would consider important, when deciding upon a particular control valve?

0 Answers  

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what is temperature compensation?

1 Answers  

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if the neutral and ground of ups voltege are connected together in the source itslef then why the voltege b/w neutral and ground comes positive in some other destination inspite of having earth pit. how can we mimmise this?

1 Answers   MPL,

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hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....

0 Answers  

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What is the difference between HMI and SCADA and MMI

4 Answers  

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What are different types of control valves?

0 Answers  

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any body pl suggest me the best type of transmitter for level monitoring of a distillation still which consists of highly corrosive and inflammable liquid.closed vessel height=5000mm especially in petrochemical industries

1 Answers  

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why orfice is not used for main steam flow calculation

0 Answers   OEG,

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When we will do simulation for I/P?IF WE DO SIMULATION through which way either series or parallel?

1 Answers   TVS,

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What is the formula to convert mv to temperature in k type thermocouple?pls simply elaborate? I got one ans.it is Temp=mv×25°+atmospheric temp,but here what is 25°,i confusef ,so pls????

2 Answers   HPCL,

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