Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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

1 3157

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 3240

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

10 12143

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

2009

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 3601

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 4645

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

Bhel,

1706

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

2 4540

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 5645

What is the difference between Split ring and slip ring?

8 34955

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

1409

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?

1555

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

5 12383

What is the actual meaning of thermal power efficiency ?

1629

Why grounding is generally done in supply end?

ISRO, OFBL,

1 12552


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Un-Answered Questions { Electrical Engineering }

what is meant by re-rolling motor? how it differs from standard motor?

1501


How to select a contactor? How many types of contactors are available

2782


what is the minimum voltage require to injure our body?

5780


In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

2695


Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

1776






what a function diesel generetaor turbo charger & turbo charger is more heated explain reason ?

1848


WHAT IS THE MEANING OG (li = 7 In)

1609


in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

1339


Why compensation is necessary in feedback control system?

817


What is the distance between each insulator in 33kv transformer and how can it calculate

1792


what is counter poise conductors

1717


what reactive how to maintain

1433


What do you mean by power transformer?

681


Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

2520


Transmission through a short line depends on

1710