Electrical Engineering Interview Questions

what mean ohm

3233

how to calculate the Neutral transformer impedance?

1884

What is the difference between earthing,ground&nutral?

Bhel,

5535

What happen to alternator if prime mover fails?

27309

0.5,1,1.5,2.5,4.0.6.0,10,16 square mm electrical wires how much take maximum current in 50htz

1750

what take 100 w take current

3004

How will change the frequency in distribution side?

1410

In 3pin or 5pin socket why the earth pin is bigger

6025

How to check 11000/1.732 to 110/1.732 Potentila transformer (PT)?

TCL,

1823

Where voltage are high and current to be interrupted is low the breaker preferred is:

1844

what is the function of short circuit maintenance ct and droop ct.

L&T,

5038

it is difficult to interrupt a capacitive current because (a)it has a leading power factor (b)current magnitude is very small (c)the restriking voltage can be high (d)stored energy in the capacitor is high

13481

To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

7042

A system having the charactristic eqation (s+1)(s+2)(s-3)=0 is (a)stable (b)unstable (c)marginally stable (d)critically stale

2680

in transmission line, if the load is suddenly increased at the receiving end of the system the phase shift will (a)decrease (b)becomems zero (c)increase (d)not be affected

7840

Un-Answered Questions { Electrical Engineering }

In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?

1691

How do i perform grounding of star point of Genset (400V) for making connection with step up transformer of DELTA-DELTA (400V to 20KV) ? while Genset itself has its own neutral and grounding bus bar inside genset breaker box whereas we have another neutral and grounding busbar in synchronizing panel next to genset at maximum distance of 6meter, would someone pls advice if we can only perform neutral grounding in synchronizing panel or should we ground neutral on both places inside genset breaker box and synchronizing panel.

1315

1.WHAT IS A SMART CAPABLE DB ( DISTRIBUTION BOX) ? 2. HOW TO DECIDE THE TYPE OF DB TO BE USED ( RECESSED/ PLUG TYPE/ SMART ETC ETC? 3. WHAT IS MILLENEUM BUS BAR USED IN DB? 4.DIFFERENTIATE MCCB AND MCB.

1439

what is the purpose of using filters in a protective relaying scheme?

1811

What is a compensator?

698

how to calculate singlephase motor efficiency?

1780

Sir 33kva 2 transformer load 900 amp calc 1800 amp mana jayega

1427

how we can decide that what value of ht line will come to any commercial building? (ans except According to the building load)

1273

what is destructive and non-destructive testing of welding

1262

A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

1672

Hi friends, i m electrical engineer i want a cdr for migration purpose so anybody have information about this then send me on jayesh_ee88@yahoo.com.please try to me

1474

what is RFCT and Insulgard Relay & It's function?

1749

I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

1276

can we synchronize star system generators with delta system generators?

1510

what is the mechanism of operation of brushless dc motor why is it more wexpensive then ordinary permanent magnet motors

1559