Electrical Engineering Interview Questions

How to Calculate the Fault Level of Electrical Installation

967

In a 11000/440 V transformer, when any one phase of 11 KV supply fails (ie., single phasing), what happens to the secondary voltage and why?

13931

Why HT motor of 3.3 kw or 6.6 KV, one side foundation ( mostly non drive end ) keep insulated from ground ?

2141

1KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason

24042

what is the difference in inductance and resistance.both oppose the flow of current but how.resistance having + ve power in both cycle while inductance having both power.

13474

why it is important to earth neutral of 3 phase transformer?

11040

From, which load current range ( upper - lower limit current)can Air circuit breaker used for in electrical circuit.

ABC,

4155

what is the difference between the HT Cable and LT Cable ?

115788

seromechanism

Bhel,

4011

ward lconard control

Bhel,

4803

percetans

Bhel,

927

bitumar

Bhel,

759

opkinson's test

Bhel,

1216

hopkinson's test

Bhel, NTPC,

32062

suri transmission

Bhel,

3171

Un-Answered Questions { Electrical Engineering }

IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?

643

difference between ac series and parallel circuit

729

What is the formula to calculate the no load current of a single & three phase induction motor

960

Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.

472

how harmonics generated in induction furnance? how minimise it?

817

Why we use Electrical energy rather than any other type of energy, mostly? Explain behavior of open secondary CT and short circuited secondary PT in energized condition?

649

how a flip flop can be used as a latch?

735

can we find the inductance of a induction motor?

761

what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

760

what's producer of XLPE cable laying in undergroung

859

What are books to be referred for KPTCL exam?

2322

In ACS 1000 drive we are using 12 pulse converter,why don't use 3 pulse converter.

757

what is the purpose that we use PLC system in power system

2757

How 3 phase invertor works?

632

How we can calculate the life of Lead acid battery

449