Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is lowest system voltage?

Apex Holdings,

7 3493

only three phases are coming in step down tranformers.how to get neutral?

5 4537

New istallation how many eathing have one transformer? Names of earthing connect places?

10 19643




a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced to 100v,which bulb will give more light? and why with calculation?

12 26412

if the diameter of a conductor is 'R' then what is the distance between two bundle conductor in a phase?

NTPC,

1 1662


in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 6665

WHAT IS SEMICONDUCTOR? EXPLAIN DETAIL. FOR EXAMPLE TAKE A PENCIL.THE LEAD IS MADE UP OF GRAPHITE IT IS A CONDUCTOR.THE OUTER COVER IS MADE UP OF WOOD IT IS INSULATOR.PENCIL IS A SEMICODUCTOR MATERIAL.

5 10315




what is Aircraft earthing and what does it do?

6 19453

Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 4175

what is corona effect?

Genco, Wipro, ABB,

39 69293

what is CT class? depending upon which it is classified?

Siemens,

3 5206

what is automatic voltage regulator and it is used?

TCS, ACME,

28 39534

what is meant by form factor and hoe related with the HT transmission voltage

2 5371

How to make vector group test of transformer?

2 4790


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Un-Answered Questions { Electrical Engineering }

How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?

800


why effective resistance should be more than static resistance in transmission line?

751


what is difference between window type and wound type transformers?where we will use window type and wound type transformers?

872


In single phase capacitor motor, if the motor rotate reverse direction then how much power will be consumed by the motor and why?

671


I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

772






how a resistor resists to flow the current?how an inductor oppses the sudden change in current?how a capacitor opposes a DC voltage.

1348


Write a note on Treatment for electric shock.

568


What technology is used in latest generators?

806


Hi Everyone ! My Name is Hakim ullah khan please i need formula of Cable Rating because i want to calculate by self without check any Table Chart... Thank you.....

404


what is the importance of earthing system on the generators big capacity and small?

515


How to size Air Circuit breaker (ACB)? What is the most important factors?

767


On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?

1674


what is the grounding Calculation formula? spouse i want to provide grounding to 3phase 18kw motor or i want to provide ground to 3phase 10kva dry type transformere or you give me any exemple...... Thanks.

713


how the works electronic energy meter?

767


how to test the electrical panel.ht lt mcc pcc.

1532