Electrical Engineering Interview Questions

compare between starting charactristics of synchronous motor with those of 3Q Squirrel cage induction motor

1332

What are all the conditions to protect generator & turbine in thermal power plant?

3352

What is the need of generator relay panel

1578

What is function of Diesel Generator?

Bhel,

3581

why dc motor runs slowly when dc supply is given?

L&T,

4627

What is difference between wire and cable ?

6558

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

1458

if we have a power factor 0.99 and we add a capacitive bank with it then what happen?

4253

15 kva dg set single phase takes 63amp( approximate) while same rating 15kva three phase takes 35amp approximate. why ? and what will be per phase current for 15 kva

TVI,

3047

What is slip in induction motor?

3330

Can we calculate the P.F if we know the only load on alternator .

4485

How we calculate the Multiplying Factor of Kwh meter for 3 phase alternator.

1453

What is the multiplying factor if line ct ratio is 1000/1 and meter ct ratio is -/5 ?

2493

how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.

1539

how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1373

Un-Answered Questions { Electrical Engineering }

which model T or pie model is prefarable in power syatem

1483

salam&hi, i need to know about how can i calculate an enough current for the new building before i submit it to the suppliers

1653

What are conduct on the testing in cf in ur site?

1232

How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

2099

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

1365

I am a electrical engg. diploma holder,applied for junior engineer (electrical),Kolkata RRB. Have I to attend all electrical,mechanical&civil portion in written exam.???

15241

how to calculate the fault in substation

1777

What is called limb of a transformer?

653

Why two phase welding machine is used instead of three phase welding machine.

1434

How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.

1817

what is stper motor

2032

On what principle electric motor works?

743

Explain how you intend to work under pressure to meet up with deadline target?

1978

Do you need any help with FEWA Electrical Supervisor exams?

615

How to decide whether A / B / C / D curve type MCB should be used?

1901