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 4140

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 4135

what is mean by flux

2 4603

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

1 3785

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

1 4448

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

2265

How we can find the regulation of transformer?

2 4297

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

Crompton Greaves, Essar, Gridco,

9 24574

What difference between voltage and current

5 6910

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

2344

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 3806

how much GROUND & NEUTRAL VOLT maintain in data center.

2056

how calculated Transformer losses.

2035

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Un-Answered Questions { Electrical Engineering }

What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvar phase voltage & line voltage

6161

what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer

2109

An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?

2149

What is the minimum value of hfe for the oscillations in transistorized rc phase shift oscillator?

1266

1.how many types of relays? 2.difference between ATS& STS?

2155

how to changeover ups in this power failur time?

2004

Define cut-off rate?

1080

Why can't we parallel the secondary circuits of two voltage transformers?

1520

how to know the diffrential relay setting of 06mva step- down (delta-star)transformer?

2027

Explain cos(theta) and Sin(theta)

2102

i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1793

Why is a plain induction motor unsuitable for wide speed control?

2275

Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode

2028

working of diesel generator ?

1836

Parts of machine and their discription in details with suitable photo

2059

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