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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 2513

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 2539

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

10 9752

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

1474

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 2822

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 3512

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

Bhel,

1253

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

2 3597

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 4809

What is the difference between Split ring and slip ring?

8 32014

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

949

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?

1144

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

5 10814

What is the actual meaning of thermal power efficiency ?

1169

Why grounding is generally done in supply end?

ISRO, OFBL,

1 11462


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Un-Answered Questions { Electrical Engineering }

WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >

1037


What is Faraday's law

571


EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.

1265


Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

1182


How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?

1214






Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

1101


hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)

989


what is the transformer rush current?

1086


what is v/f control in VFD?

608


why ss stablity limit is more transient stablity limit?

1210


how can we select the appropriate VCB ?

1421


What is the difference between the transmission line and distribution line?

199


What is difference between start imitation and start interlock for 3 phase motor protection ?

1362


what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?

1036


1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?

1644