Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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

2 3604

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

GE,

1 2722

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

1623

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

3 5427

What is the differemce between Pulse transformer and Welding transformer.

BARC,

1 2646

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

BARC, Vipul,

1863

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

2 6302

how many load we can take for lighting

ABB,

1743

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

1 12584

what is the difference between star and delta connection?

3 5884

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

1495

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

2 7204

What is meant by time harmonics and space harmonics?

2355

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

2 3382

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 ?

3 3940


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Un-Answered Questions { Electrical Engineering }

Does magnetomonopoles exists? one maxwell equation strongly suggests no, but how about their existance in plasma?

1464


what are the possible reaons & remedies if resistance of NGR getting heat up

1377


Mention how NPN and PNP transistor works?

683


If breaker is undefined position, first step to do.

1772


WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

3801






Why human body feel electric shock?

616


Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??

1201


WHAT DO YOU MEAN THE DIFFERENT TYPE OF CURVES OF RELAY LIKE STANDARD INVERSE, VARY INVERSE, NORMAL INVERSE, LONG INVERSE ETC....

1523


HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

1478


how i can calculate the size for fire cable

1482


Can clean earth cable be considered as low current cable

1536


What are the disadvantages of autotransformer?

641


what is the formula for hv test for cable and circuit breaker..????

1520


What is meant by Im=30mA@Vk/2. How to know the kee point voltage for CT design

2847


We have received supplies of the ordered material. payments against the supplies also released. Where ST paid 4% against form C. Meanwhile it has been observed that 25% of material supplied was defective. Please suggest whether the issuance of C form from our side would be stopped till settlement of liabilities.

1453