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Electrical Engineering Interview Questions

What happen if we apply square wave or traiangular waveform voltage to the transformer primary winding instead of sinusoidal wave?

1092

What are the tests to be done on circuit breaker?

2541

Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?

1111

new 90kw motor installed so how I purchased cable ,fuse,etc please give me technic for cable selected why always capacitor delta connection

960

How to calculate the current carrying capacity of sized cables, and there is any formula. please send to 'than.achu@yahoo.com'

1648

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

1151

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

3104

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

1158

what are inherent currents?

Sail,

1145

How to calculate the value of capacitance of a capacitor used in power factor improvement plant if we know KVAR and voltages?

2212

For a load of 40HP induction motor.what will be size of Armoured copper cable require to connect the motor to starter in Star-Delta?

CG,

3839

what is the disadvantage of lagging power factor & why ?

3790

one electromagnet is called

1000

Why transformer rating in KVA? describe.

5017

What is sequence network? Discuss all three types of sequence network.

2205

Un-Answered Questions { Electrical Engineering }

At what factor resistance r of a conductor depends?

205

Advantage of LT panel vs HT panel

1450

Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.

1518

Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?

1644

How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

1131

Draw the line diagram of diffretial relay connected to transformer?

1502

WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

898

what is the major difference between LIBBP & HIBBP.. which one is most preferable..

1383

Ratings of power transformer,Distribution transformer.

628

What is an ac motor?

177

What is Plank's Law?

239

working principles of cf lamp,incandescentlamp and f lamp?

1359

how to decide choke rating for drive?

1429

I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400

950

what is servo motor and how to work it.

1019