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L&T Interview Questions
Questions Answers Views Company eMail

What is the max demand on your transformer and your company?

10 52234

How do you connect the capacitors on polyphase circuits?

10 37647

Do you know how to measure the earth resistance? if so explain it

42 156299

Why a starter is used for a motor?

50 137002

What meant by lagging and leading? When if they are occurred what preventive methods should be taken?

14 51938

Whats meant by trivector meter where it is connected at the substation?

20 107191

What happens when a main method is declared as private?

22 56171

What Name space does the web page belon in the .net framework class hierarchy?

1 7420

Method of findingthe dry ingredient quantity of 1 m3 concrete.

25 190382

tell me about yourself?

10 22906

What is Liquidity Ratio?

19 40491

How can you clean up objects holding resources from within the code?

2 6307

What is a Quality Factor?

19 51553

what are active and Passive Components?

102 203703

tell about yourself, please do give with example .

40 117260

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Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

1493


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492


Market strategy is constantly changing, what steps have you taken in the last three months to keep up with of current trends?

782


How to create a new table by selecting rows from another table in mysql?

574