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ABB Interview Questions

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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 10045

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

9 49123

What is system earthing?what are the types?

1 3678

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

1 4174

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

2069

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 9514

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

5 15721

if mr.X get 2,00,000.00 per month salary. than how we will calculate his tds.

3 6424

Explain the working principle of variable frequency drive?

3475

what is the purpose of battery tap voltage.

3 24675

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

8 38607

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

2344

How to estimate the cost of projects ?

3 17770

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

1 15365

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

5 12985

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Un-Answered Questions

What is the Boundary value analysis and Equlance class partition for select * from emp

2217

Dependency to start wicket?

How many way to start and stop weblogic servers?

1084

Difference between Target-based loading and constraint-based loading?

1000

What is ubuntu operating system used for?

927

Difference between stop and terminate the instances?

160

Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

2055

How to make a new directory in unix?

1038

i am the student of icwai (intermidiate) What is the tds and how use the different state ..

2118

Explain the rowcallbackhandler in spring?

411

what is the difference between a having clause and a where clause? : Sql dba

1087

Introduction of rollup clause using sum and group by clause?

968

What is a sharepoint theme?

744

Define Vulcanization?

1172

Define the management tools in Cassandra?