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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 34124

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 5396

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

9 37073

What is system earthing?what are the types?

1 1381

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

1 2111





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

763

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 6043

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

5 10533

what is the purpose of battery tap voltage.

3 12434

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

6 17186

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

686

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

1 9608

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

5 8239

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

3 4128

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

8 14725

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Un-Answered Questions

Why do you keep the name of the used cipher in the open?

1290


in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

572


Which is better Oracle or MS SQL? Why?

2384


what is the difference between Windows application and Unix application?

1356


Load transfer in 11kv double busbar switchgear - operation.

573






What is the purpose of stablization resistor in high impedance bus bar protection

610


Its being commonly asked during every interview like, Would u plz like to introduce urself?? it donesn,t fall under any category wich is placed over here, so i,ve selected this category after been choiceless. Can any one plz give me vivid ans for this Q>..

887


what is milling and types of milling?what is drilling and types of drilling? what is tapering and their types?

1707


Define FBT with example & how it can be calculate ?

91


please give information about ERP Projects and how V-model use in project

1451


Any one regarding result of NIC(National Informatices Centre) interview for SB Programmer?

837


STATE WORKING OF VACCUM CIRCUIT BRAKER?

667


pls. tell all the commands for configure cisco router 1900 series.

1504


* ** *12* *123* *1234* *12345* *123456* ********

602


What is Self-Installation Kit ?

740






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