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Electrical Engineering Interview Questions

what ll happen if neutral is not shorted with phases while doing transformer short circuit test & what ll happen if neutral is connected to ground?

2504

a. void main() { char a[6] = "INDIA"; while(*a) { printf("%c",*a); a++; } } 1. india 2. I N D I A 3. no output 4. error 5.Null

9788

c. int m = 10; main() { int m = 20; {int m = 30;} printf("%d %d",m,::m); 1. 10 10 2. 10 20 3. 20 10 4. 20 30 5. 30 20 6. None

3951

what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

3341

Can we step up a 230V supply to 400V using a single phase transformer??

5267

it is possible to run 130V AC and 230 V AC cables run in same tray

2719

what is sevice settings for mccb?How can be it setted?

2865

How can I indicate rpm on digital rpm meter with help of simple tacho output? tacho output is 90v at 3000rpm.

2463

WHY DOES NEUTRAL DO NOT CARRY EVEN THOUGH IT CARRIES RETURN CURRENT?

3621

WHAT IS METHOD TO DESIGN SIZE OF A 11KV UNDER GROUND CABLE FOR A OUTGOING FEEDER FEEDING 6NOS 250KVA TRANSFORMERS WITH 5KM LENGTH OF FEEDER?

2100

why should be the frequency is 50 hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50

4757

How to find the maximum load that can supply by a particular(say 315kva) KVA rated transformer?

ME,

3130

How to find the maximum load(in KW)in a big industry, having motors,lights,lifts etc..?

ME,

3106

How to find the maximum load, that can be supplied by a transformer.....

ME,

3653

mccb service sittings be done?

931

Un-Answered Questions { Electrical Engineering }

What is the comparison of PILC and XLPE cable

842

Define pole pitch?

173

What are the conditions for sustained oscillator or what is backhouse criterion?

206

whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?

568

Incoming line 11kv And transformer capacity is 2500kva. Consumption load is 1300A. Then fuse capacity is 11kv line.

810

how can i change the rotation of the AC single phase induction motor and show me by diagram

860

hello friend i wish to study a course related to the electrical construction, controlling and monitoring , which course i want to study? pls give me the name of institute?

948

The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

225

take 100kva DTR( delta/wye ), what ll happen if we connect 11kv to LT side instead of connecting to HT side? will the DTR behave as a step up transformer or something else????

1340

Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

1351

what percent do you derate your copper wire when you change from copper buss to copper wire

1006

If increased the frequency up to 1000 then what changes shows in voltage?

1578

We have 5 Distribution sections with variable loads&We have 3 Gensets(500kva,380kva&250kva) our total load is between 400kva to 600kva. so how could we connect 3gensets.

928

What are different types of control systems?

238

what is mean by descripiency relay? & wht is its ansi code?

1994