Electrical Engineering Interview Questions
Questions Answers Views Company eMail

can any one help me for my ups inter view , list out few basic technical ups question with answer.

1 2535

what is breaking capacity

1 3297

HOW TO CALLICULATE RESITENCE,REACTANCE AND IMPEDENCE VOLTGE OF TRANSFORMER 13.33 KVA 144/240 VOLTS 93/56 A WITH FORMULA

ISRO,

1501

if any one phase of the 11kv/415v distribution transformer not delivering the supply voltage what will happen

2 4117

what is strip power factor?

TATA,

1609

What will happen if the voltage in my house drops from 220V to any lower voltage?

1628

diff b/w normal grounding and resistance grounding

1383

why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

1488

What is Procedure the procedure to select CT's & PT's in 66kV and above substation

1 2248

Why we apply only reduced voltage to the alternator while conducting slip test ? also the current increases to a larger value with reduced voltage itself Why ?

1 6215

What are the main problems in distribution? I have to do an assignment so which problem should I choose? Like power factor problem etc.

4 4533

In the diesel generator if there is an AVR (auto voltage regulator) gone faulty, in this condition is there any way to generate the voltage from the alternator? I need a brief explanation can you please help somebody

Vodafone,

1 4890

Can anyone tell the proper diagram of star delta starter????

1447

how to calculate singlephase motor efficiency?

Alstom,

1698

can you any one give exact mathematical relation between AC current and DC current?

1366


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Un-Answered Questions { Electrical Engineering }

What will happen if we introduce negative feedback to a control system that uses a positive feedback?

658


how oti and wti connections are different from each other?

1571


what is the meaning of 0.5ohm Resistance

1375


Which motor connection is preferable star-delta or delta-star?

604


what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?

1748






what are the preventive maintanance actions taken for air circuit breaker? please answer me

1535


Explain dc generator with its types?

607


My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1417


What is error of a measurement?

601


define the non synchoronism of synchoronous machine in general g or m??

1426


How we can change the direction of rotation of Induction motor? Prove it using graphical

1593


what is the difference between general inverter and solor inverter clerly explain plz

1639


What is an alternator impedance value?

2381


What is the maximum number of swithes that can be connected in series up to down stream point in an LV Distribution system?

1504


could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?

1565