what is vfd(variable frequency drive)?type of vfd.

2 Answers  

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what is earthing ,grounding in c&i panel?what is the resistance in earthing and grounding of c&i panel?what do u mean by shielding and what is its resistance?

1 Answers  

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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 u mean by speed control in turbin? how it was working?

2 Answers  

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what do you mean by CJC (cold junction compensation).?

5 Answers   Jindal,

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What is SLPC & MLPC? How it works?

2 Answers  

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I have got a call of IOCL interview for projects having 2yrs experience. What sort of questions should I expect in the interview?

0 Answers   IOCL,

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How Control valve sizing is done?

3 Answers  

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what is the difference betwwen the 2wire level transmitter and 4wire level transmitter??and their applications also??

2 Answers  

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what is isloted barrier how it works and what are the main purpose.how it make safe area.

0 Answers  

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Identification of ss fittings, pilot valves, relief valve.

0 Answers   CCIE,

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difference b/w single acting and double acting actuator by using application only?

2 Answers   McDermott,

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