Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the meaning of 'A synchronous motor floating on line'?

2 21167

how to calculate the no. of turns in secondary side of CT?

1 5784

Between Turbo alternator and Hydro alternator which one is more difficult to cool and why?

2 13566

Between AC generator(alternator) and DC generator which can be designed for high voltage and why?

1 3744

How damper winding in synchronous motor suppress Hunting?


2 24664

Which is stiffer between salient pole rotor and cylindrical rotor synchronous machines? Justify your answer.

1 13487

Which theory is used in the analysis of salient pole rotor synchronous machines? Who is credited for this developement? Could the same theory be used for cylindrical rotor synchronous machines?

1 5703

Why alternators are rated in KVA?

12 35619

Between rotating armature type and rotating field type arrangements which one is adopted for large rated alternators and DC generators.Why there is difference in the choice?

1 10652

What is the need for checking knee point voltage for CT's?

1 3843

ho can we calculate the conductor insulation value according to their ratings like voltage,current etc.how insulation value related with voltage,current and power of amachine


what are the main problems that happen in an emergency light and how to fix them ?

2 4738

Without seeing the nameplate descriptions of a rotating machine,Is it possible to say which one is a motor and which one is a generator? How would you certain this?

3 5262

How the speed of synchronous motor changes with the variation of load?

1 4863

Why synchronous motor runs at a fixed speed? what is the name of that fixed speed?

4 14807

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Un-Answered Questions { Electrical Engineering }

What is notching in dc machine?


where reactive power is used


does buccholz in a transformer use batteries


Approach of a cooling tower is the difference between temperatures of what factors?


what will be happen if earth point is being used for as a neutral point for raw power , and same will be used for ups earthing


write encoder 17 pins details? pin a;b+, pin b;w+,..pin s & t. what is the meaning of b+, w+? explain;


why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?


electromechanical relay type identification example : type=tjmh t-stants for j- m- h-


how to define tell me about self


How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.


how to calculate the battery AH


neutral earth resistance testing is it possible for transformer while in load condition


what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?


How to choose the vector group for the step up and step down transformers??? Tell me the which vector group is suitable for step up and step down transformers and whats the reason to choose and whats the benefits???


Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB