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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what about the input current fan when regulator regulates to speed low?

1 2875

We have a 1275KVA existing Transformer in a power plant project. Customer want to get it test & confirm whether it is a Dyn1 Transformer or not. Pleae let me know how to test it.

Allied Group,

1 2924

why Transformers power mentioned in KVA?. and why Generators and Motors power mentioned in KW?.

10 10995

What is the actual calculation for transformer short circuit test?.

1790

What is the purpose of Rotor earth fault relay and How to test the Rotor earth fault relay in generators and What is the procedure?.

1 3173

why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor

Vedanta,

1 4140

why we use condenser in the thermal power plant, althrough the same vapour will be again heated

Bhel,

1502

Why motor is not calculated in kva, whereas transormers are calculated in kva

2 4072

WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 5232

What is the difference between Split ring and slip ring?

8 33649

we specify current in case of feeder but in case of distributor voltage, why?

1214

In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

1359

Why the frequency of a system is changed if the load changes?

5 11687

What is the actual meaning of thermal power efficiency ?

1413

Why grounding is generally done in supply end?

ISRO, OFBL,

1 12124


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Un-Answered Questions { Electrical Engineering }

how to measure dc earth leakage current?

2395


what is the internal working of star delta starter

1474


What is difference between YNyn0 and YNyn ??

1599


what is the difference between RMS & TRUE RMS VOLTAGE

2211


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

1308






How much voltage we need to apply in 33kv cable during hipot test of cable

199


what kelvin's law ?

1381


1 Ton is equal to how many watts?

498


why swinburnes test cannot be performed on series machines?explain

1672


What is different bewteen low or high impedance busbar protection scheme

3501


what is the difference between vector scale and vector diagram?

3505


Why power genaration in India is at 50HZ while America its 60HZ

1709


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1238


What is limitedly stable system?

461


What are the types of excitation system?

1297