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ABB Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Single Phasing fault???(not single-phase fault)

6 12283

How we calculate the current carriying capacity of the different sizes of Aluminium busbar ?

3 10430

when is the Ohms law is applicable?

11 14073

What makes the difference between 50Hz supply and 60Hz supply which one is economical? What is the use of using increased frequency?

5 7021

why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 5916





what is different between IP55,IP54 and IP66?

2 48830

which technique servo motor tested o.k or faulty ?

1 2845

If we have a 2000kva load,How much kvar capacitors we go to add to improve the power factor at 0.9?pls give the calculation and fully theory?

2 4830

what is a difference b/w earthing & neutral?

5 7163

What is the difference between Class PX & Class X CT's

2 16443

What is the difference between MPCB and OLR?

11 38567

What is Meant by Load factor in Power plant?

2 11088

What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

1223

What are the factor to be consider for CT selection in 132kV substation?

922

what size of copper busbar use for 11kv 630A

3 7270

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Un-Answered Questions

DB is in windows, application server can be configured in Windows or Unix or Anyone?

1234


Tell me about a time when you had to go above and beyond the call of duty in order to get a job done

3049


which materials can l use if l want to use length wave 680 to 900 in hplc

861


How do you convert basic cube to transaction cube and transaction cube to basic cube?

994


The number of spring loaded balls provided circumferentially in a synchromesh gear box is a) 3 b) 4 c) 5 d) 6

142






How do you resolve a composite and a multi valued attribute?

444


what is the minimum power (P=VI)to produce a spark?

906


suppose i login into gmail page after that i read all the messages (say 10 messages) i have to send (SAVE) the messages in Html,notepad and i have to replay(Compose) send the messages please give me the code and give mail id so that i can clear my question

845


what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing

1230


How we calculate DC inducation moter Amp? Sir pls give me formula......

758


wht is scope of ur project?

1006


What is area of interest?

1072


please specify some books name in preparing a bank exam apttirutude questions

822


What do you understand by the term Charge back?

766


Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.

321






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