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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is hysterisis loss and eddy current loss? how it occurs?

Aurobindo, MAHINDRA,

2 14862

In protection core of a C.T. why Knee pont voltage is greater than SLV and in metering its viceversa?

2 2787

howmany insolaters needed in 66kv line

Essar, L&T,

9 16993

maintenance parameters of sewage treatment plant

1 2179

how to calculate the breaking capacity of different breakers.

UltraTech,

1313

what are the factors to be considered while design the breaker either HT or LT??

1043

what are the types of control systems to control the speed of the motor??

1 2640

why industry prefer ht motor instead of lt motor.

1241

how to measure earth resistance of a substation

2251

how to calculate cable size in diffrent loads?

ABB, Sterling,

1252

how can we find of cable capicity in amper?how much ampere withstand by 300sqmm cable?

1 2330

what use marshalling kishock in power transformer?

2 2859

why use -48 volt DC power in telecom?

3 5582

In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

Hindustan Unilever Limited,

6 11094

how to wiring it with contactor and timer together

962


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Un-Answered Questions { Electrical Engineering }

Why saturation region slowly shifted in the left side?

1052


show the single line diagram of star delta starter with single phase preventer

3495


How to select the gauge of wire for winding of motors? How to select number of turns for winding of three phase induction motor?

1812


what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks

1045


what happens if earth of 33kv cable is not connected to earthing pits? please send this query's answer to ngrm.sudha249@gmail.com

1179






Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?

547


i want to know that how the height of Ct ,cvt ,LA calculated on the basis of creepage distance

1501


3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1031


explain all the classes with example

1075


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

1101


How can we checked Killo Watts of Motor & Alternator?

1226


how to CHECK CT AND PT AT THE FAULT OCCUR IN GENERATOR RELAY PANEL .

1355


working function importance of mdc meter

1310


what is the preventive maintence for ht panels and busbars and vcb abd acb's.

1453


in star-delta tranformer,if the input of star connection is 400/7v 3 kva then what is the output of delta connection?

1239