Answer Posted / p mishra

Coal are the form of graphite which is a best conductor.So
for reducing the earth resistance we use coal.Like salt is
made of Na+ Cl-.These ions are good conductors of
electricity, hence the earth resistance does reduces when
salt is present on earth. Water conducts partially. So all
the materials when mixed the resistance/ohmic value is
reduced.

How out of step protection relay works?

2533

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Explain the working principle of Synchronous Generator and Assynchronous generator?

2316

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What is voltage ratio of a transformer?

1252

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I want to design a heating coil of 80/20 nicrome for 3.5KW please give me the calculations choosing for physical dimensions assume coil voltage will be 110V AC assume necessary conditions

1654

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Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

2107

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What aturn on methods of scr?

1232

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We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?

5223

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why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

2263

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Which contains in POLE ASSEMBLY of a 11KV Kirloskar-make SF6 (Model No-FP620A12)? Will u clarify with drawing?

2231

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give single line diagram of D.G distribution form alternator to main L.T panel?

7611

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I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions

2200

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A d.c. Shunt motor is found suitable to drive fans because they require?

1386

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If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

1547

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WHAT IS counter flux IN CT?

1996

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if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

2116

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