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Electrical Engineering Interview Questions

Why dnt we generate 5-ph or 7-ph supply like as 3-ph supply

2745

What iz main protection of mediuum voltage motors and what iz the standard IR voltage of 6.6 and 11kv motors.

GE,

1909

In 11/0.414 KV Parralel supply network with Bus tie closed what will be the fault level is it doubled or halved??

1170

how much current will be drawn by 3 phase, 415v, 50 hz, 20 ton central ac

4450

What is the differemce between Pulse transformer and Welding transformer.

BARC,

1942

What is servo motor and what are different types of servo motor

1437

HOW TO CALCULATE BATTERY BACKUP TIME & AH CAPACITY AGAINST UPS KVA RATING?

5448

how many load we can take for lighting

ABB,

1288

what is the difference between dropout fuse and horn gap fuse. how to choose between them

8908

what is the difference between star and delta connection?

4832

what is ATS & RING MAIN UNIT in Distribution System?And its Function.

1059

what is ATS & RING MAIN UNIT in Distribution System?And its Function.

5187

What is meant by time harmonics and space harmonics?

1851

AC is the magnitude of sinosudial-wave but we use cose value to determine power factor instead of sine value.

2500

In case of legging current of 20°, pf is .94 and leading of 20°,pf is .94 , in mathematicaly both are same but in realy how it is differ ?

2954

Un-Answered Questions { Electrical Engineering }

why we use Test Terminal Block in 11 KV and 33 KV electrical panels.

543

1026

how do we calculate length of starting time and repeated starting of a direct online starter?

1126

Do u know any one? how to find out in motor rated amps? formula?

1021

Single line digram for 11 kV to distribution use go,la and do

828

Explain Energy and Power signals?

819

What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )

1193

1556

1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

1282

If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??

1072

why we use the 100% and 95% stator earth fault protection for the synchronus generator ?

1261

How to work meggar?

910

what is per unit calculation?looking for simple and strong explanation thk u

1582

How we calculate the Multiplying Factor of Kwh meter for 3 phase alternator.

940

what do you mean by class PS CT and what are technical details needed for calculating it?

1082