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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What Should be the value of Vector Surge angle at Tripping and how to calculate it?

1121

can any one tell in easy method for circulating current ??

1230

delta motor winding resistance I take normally single winding is 2.5, which value is came delta connection ie RY ?

1051

how withstand of hi-pot test outputs of transformer wire 2.5mm

1001

what is the role of frequency in electrical system

5309

what is function of reactor coil in Power factor correction panel

2330

what is stepping motor and where can use in electrical installation.

2809

What is spill current in protection relays?

1835

If the load is 10Kw and power factor has to improve from 0.5 to 0.8,how can we select the capacitor rating accordingly.Illustrate by showing formula?

7188

If the capacity of water Tank is 50000 Liters situated at 20 meters height from ground level,What would be the size of pipe and how much USGPH water will be supplied and what will be the motor or pump rating used for this work?Illustrate by showing formula?

2479

one hp 3phase motor what generate power factor

2073

i will applied in 1U-1W on 440 volt primary delta side. what is the result of magtic balance test

953

hi i have a 400kva transformer i want to know the test i can use to check on it thx

1957

what r the tests on the 3 phase transformers can any one explain how to test using megger on transformers thx

3203

In Transformer testing at Shop test we normally test for vector group, open ckt.,short ckt. but what are the other test performed for transformer once it reaches at site.For e.g:if the transformer is dry having rating 1000KVA?

2524

Un-Answered Questions { Electrical Engineering }

What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating

555

a starter used for squirrel cage induction motor?

761

ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

942

Electrical 'C' license full abbreviation , and full form

579

Can u Explain about the electronic trivector meter and the use of data converters in them?

1375

How to run a three phase motor into single phase........

1150

What is the different between digital phase converter and ordinary phase converter?

172

how we decide the require size is this for a known current at fuu load?

982

I need a formula to calculate the size of cable as per load but in the terms of length. Please Reply me as i search lot of sites but i did not get the answer.

1130

Why squirrel cage motor can only use with low starting loads ?

1064

whatis the commertial spec. of distribution boards ?

1109

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

942

How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?

907

what are types of encoder

908

what is meant by motor startup supervision & motor load jam protection ?

4389