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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?

2302

Wtat is vaccum currcuit breaker.define with cause of used.and where be use it Devise .

1 3937

how invertor convert the dc into ac give brif detail

2093

How we can convert H.P into KW or Vice versa

Suzlon,

11 19413

Why 4 pole generator generates more power and 6 pole generates less power campare to 4 pole

Julius Berger, Suzlon,

2 6426

Why Batteries are rated as AH i.e AmpereHour,and its formula to converting AmpHour to Amp

Suzlon,

4 8993

What are the different methods of improving power factor,especially in Wind Sector

Suzlon,

2 7031

11KW Delta motor is taking about 44Amps in star and goes upto 70Amps in delta and trips OFF. The rated current is 26Amps. Application is for the blower. The motor takes ( no load without coupling impller ) only 2.5A and 5Amps in star & delta starter test.Need to know why its taking high current.

Pfizer,

10 19639

What is relation b/w Transmission Lines & Communication Lines ?

2 8730

quantizer means?

1887

WHAT IS DIFFERENCE BETWEEN idmt and instentanous relay? is idmt is used as back up protection or else?or when instantenous relay saturates IDMT will operate???

BK, REL,

1 11495

what is threshold voltage for a relay???what does it exactly means ?whats its value in our indian transmission system say 11kv feeder RMU relay

3 13207

if the back emf eqution for dc motor EB=(QPNZ/60A) THEN what is the value of A for PMDC MOTOR OR how can dicide the value of "A"

BSL,

2 5101

IF WE SELECT THE 60H FREQUENCY IN INDIA WHAT WILL THE GOOD AND BAD EFFECT ?

3 6660

How can we calculate the capacitance of generator?

1 4611

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Un-Answered Questions { Electrical Engineering }

What are the advantages of speed control using thyristor?

1081

WHAT IS AIR GAP VALUE IN MM FOR A 11KV BUSHING OF 11KV/440V DISTRIBUTION TRANSFORMER. AND AIR GAP VALUE OF 25 KV BUSHING OF AT TRANSFORMER OF 25 KV TRACTION. WHAT IS THE CALCULATION FOR THE AIR GAP PERMITTED FOR BUSHINGS AT DIFFERENT VOLTAGES.

3442

What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

2228

Why the standard of ambient teperature mentioned as 40 degree celcius in machines.

1906

Can we use shunt trip coil instead of trip coil with protection relay for protection?

1702

bus bar design conditions and sizing pls tell me quickly

1861

How to Calculate The Neutral Earth flat design calculation for the Synchronised generator (Gen 1-650Kva, Gen 2-725Kva

1607

sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder

2060

What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

1919

how choose conductor&depending upon load

1842

HOW DO I CALCULATE THE SETTINGS FOR THE DIFFERENTIAL PROTECTION OF A 12kV/6.6kV, 6MVA,DYN11 XMER WITH PRIMARY SIDE CTR 400/1 AND SEC SIDE CTR 600/1?

2556

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

1754

how ceiling fan worked?

1858

what is the effect of power factor of machines in starting current

2014

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

2226

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