what is the basic working principle of I/P and Positioner in any control valve.

12 Answers   Essar, Visa Steel,

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why do we use 4-20 ma current why cant o-20ma

6 Answers   Southwest Cheese,

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How to convertion 100 m3/hr to mmH2O or to Kg/cm2?

0 Answers  

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how to measure oxygen which methods are using?

0 Answers  

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what is use single seated and double seated valve?

2 Answers   Doha Petroleum Construction DOPET,

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there are two candidates p and q in an election.During the campaign,40% of the voters promised to vote for P ,and rest for Q.however, on the day of election 15% of the voter went back on their promise to vote for P and instead voted for Q. 25% of the voters went back on their promise to vote for Q and instead voted for P.suppose,P lost by two votes,then what was the total no. of voters.

1 Answers   GATE,

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How to do calibration of magnetic flowmeter

1 Answers   Kharafi National,

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what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.

0 Answers  

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how ranges is decided for drum level or dearator level,in my pplant i have seen for boiler drum range is -1000 to 1000mmwc, while for dearator -2000 to 0 mmwc ,why they decided to take this range ?

2 Answers  

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Why we are using temperature and pressure as a reference when measuring flow of steam?

4 Answers   Shell,

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how control valve works?

7 Answers   Qatar Airlines,

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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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