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ABB Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to identify Motor leads in their order coming out from winding without tag (U1, V1, W1 & U2, V2, W2)?

6 37843

I have a transformer whose primary operates at 230V, 50Hz for which the secondary voltage will be 12V, 50Hz. What will be the secondary voltage if the primary is fed with 400V, 8KHZ Signal?

6 5778

Why TAP changer provided in primary side of HT transformer ? and why not in secondary?

9 40186

What is system earthing?what are the types?

1 1864

Why P.F(power factor)relay should not be connected to the D.G(diesel generator) incomer side

1 2322





How can we calculate the KVA rating of a Distribution transformer from its core details?

911

What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

3 6353

What happens if the capacitive reactance of a transmission line is very high?

5 11222

what is the purpose of battery tap voltage.

3 14980

Why we Specify Transformer rating 433 V Instead of 415V ?

7 20034

what is the diff. between x'mer , isolation x'mer & ultra-isolation x'mer ?????????????

846

what is the procedure for three phase motor differential relay testing can it do with single phase test kit?

1 11063

What is power factor ?What are the benefits of improved power factor & how. Please explain with examples.?

5 8800

What is Grounding? any difference b\w earthing? if yes plz explan??

3 4481

why generally transformer are in star to delta or delta to star used?

8 15534

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Un-Answered Questions

How to explain a banking project in interview as a test engineer???

1609


tell me about roll model as father

973


os is developed in c no java is more secured then c na why dont the os developed is developed using java

2688


here is my requirement A1 is alphanumeric with value 'A1B2C3D4' as defined below 05 A1 PIC X(8) VALUE IS 'A1B2C3D4' but i need to have A2,A3 as ABCD & 1234 repectively...... A2 = ABCD A3 = 1234 Can you please explain me what are the different ways to do it?

4985


What is lead? What basic information is needed in a lead?

737






How the cellular phone is working?

907


What is meant by 1024, 2048, 5096 bit encryption?

2431


One of the difficulties our company has is evaluating suggestions in a timely manner. What changes would you make to expedite evaluations?

967


why booster transformer is used in sumpners test conducted on transformer????

2267


hi friends, in sap screen with 000 client i unable to logon,with 001 client i can login but i want to log on with 000 client how i can loggin with 000 client intial screen ,please can u help me

4335


HELLO FRIENDS I WANTED TO THAT IS DUPLICATE KEY MAKING CHARGE IS UNDER THE HEAD OF GENERAL EXPENSES

995


Where is the maximum temperature in refrigeration cycle? a.Between evaporator & compressor. b.At Compressor c.Between compressor and condensor. d.At condensor

1073


How would you teach an old lady to fix her dwindling internet connection?

639


How to Rcognize the Objects in the Web Page Dialog Using QTP

1326


 What is a database refresh?

425






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