Answer / chandra mohan

control modes are two types
1. continuous control modes
in that three types are there
I. P-controller
II.I-controller
III.D-controller and combination of these modes
2. discontinuous control modes
in that two types are there
I. two position control modes
II. three position control modes

can any one tell leakage class in control valve depend on which parameter and there is any specific table or chart for selection of valve leakage class

2 Answers  

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which type signal come control valve

6 Answers  

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what are the possible reasons if a control valve fails to open/close?

1 Answers   DEWA,

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What is the difference between PLC and DDC?

0 Answers   Emami,

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how to calibrate absolute pressure transmitter

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wat are the interview questions asked in air india for post service engineer

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Gas equation

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How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?

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Sir i am preparing for PSU exam for ONGC but i am not able to get the appropriate syllabus and previous year question papers. Kindly send me the same, that will be a great help from ur side. OR if anyone can plz send me the papers and syllabus please.

11 Answers   Bhel, GAIL, IOCL, ISRO, NTPC, ONGC,

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

12 Answers   Essar, Visa Steel,

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wht is dcs architecture ? can u give example?

3 Answers  

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What is Actuator?

3 Answers   Descon,

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