Answer Posted / r.anantha krishnan

5 types.
1.parallel two wire
2.twisted pair
3.shielded pair
4.coaxial lines
5.wave guides

Why earthing is necessary for any equipment?

1783

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What are unstable systems?

1168

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Igfet is a

1688

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How many size of cable required for a 300m long and 30kw inductive lode

1351

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WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.

1964

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How DC earth leakage currents can be reduced ?

1967

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I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....

2152

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Batteries. What is the difference between Lead and Nickel batteries ?

2257

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How to test IR testing & magnetic balance test

2041

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What is the basic principle of operation of alternators/dc generators?

1141

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State the factors, for the choice of electrical system for an aero turbine.

1219

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whatis the commertial spec. of distribution boards ?

2130

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What do you mean by an instrument transformer?

1144

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How to design the no. of ceiling fans required in 5mtr X 10 mtr X 3 Mtr hight room?

2209

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Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,

1891

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