Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why white color LED light is not possible?

1 4141

operation principle of a generator? Gss, Diesel and HFO which is better and why?

1 4967

I do wonder why current is present in neutral wire?i check single phase lead current feeding air conditioner...on its phase its current was 10A while same was 10A in neutral...as we know in neutral voltage is zero so if voltage is zero then how current appears on amp meter? my second observation is (just imagination)when I touch phase wire it give me shock but when i touch neutral nothing happens although as above its carrying current(amps) third but with same logic...as in simple Alternate current sine curve there is + and there is negative peak.means every time phase changing so how come every time same phase and same neutral stand (pardon for english mistakes)

1 4144

what is mean by flux

2 4603

How many loops can be provided in a circuit as per IS rules.?

1 3797

how i meggar value of 11kv alternator winding.and with meggar.

1 4452

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

2265

How we can find the regulation of transformer?

2 4300

Why selected cable colour red yellow and blue in 3 phase Electrical system?

Crompton Greaves, Essar, Gridco,

9 24575

What difference between voltage and current

5 6931

What is the Basic Difference bitween Long Shunt Connection and Short Shunt Connection in DC Generator?

2348

what iz second and fifth hormonics please explain

Satia,

1 3455

why the generator operating along with the infinte bus bar should never be under_excited?

1 3815

how much GROUND & NEUTRAL VOLT maintain in data center.

2058

how calculated Transformer losses.

2039

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Un-Answered Questions { Electrical Engineering }

How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

1827

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

2075

What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?

2144

1.how many earth pits are required for 1000 k.w plant include substion , transformer ? 2. how many earth pits are required for 500kva generator.what is formula to calcute?

2918

How to calculate LT XLPE CABLE for 11 kv / 433 v , 1000 kva oil type transformer system?

1919

How to test IR testing & magnetic balance test

1997

how to find the resistance and gap volatage of the diode??

2057

What is the purpose of stablization resistor in high impedance bus bar protection

2006

Define phase lag and phase lead?

1138

before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1660

Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. I am going to install a oo kva transformer & 380 kva dg set what should the earthing value?

1145

Hello sir i m student of gtu .what is idp.

2196

what is difference between 5A and 100A CT constructional wise and operation?

3570

How to work E.L.C.B and how to connect in circuit.

2015

can we use trip light with bus coupler?

1941

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