Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?

762

How many points does a Circuit can have?

760

if two transformers are parallel & both have fault short ckt. impedance of 50KA in each case will it increase or decrease show example?

1 1723




How many points can we have in AC Circuit? Show by giving suitable example?

3 2902

-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.

2 2365

will there be any problem by recovering slip from single phase induction motors?

709

What is the electrical difference between Earthing Switch (ES) and Maintenance Earthing Switch (MES)?

1 1228

how we calculate the knee point of a protection and metering CT and what is the testing procedure.

CS,

1 2309




HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

Areva,

870

What is a LBB protection and why it is used?

Gridco,

2 6098

what is a starter ??

NPTC,

2 2647

what main difference betwenn invetter & ups & major difference

ABB,

2 4460

Dear sir, I am working in wind mill division , pls explain Pls explain in details with formula My question is Wind speed 3.5 M/s Gen RPM is 1500 ( 25 K/w Production ) Wind speed 12 M/s Gen RPM is 1500 ( 220 K/w Production ) Why in 3.5 m/s generation was low , why in 12 m/s generation was high , Pls dont explain wind force or wind density , that one already i know For the above question RPM was same why the KW was different Answer : 1. Its depends on the density ( Force ) of the air Sir , Pls explain wit Formula sir

Vestas,

1 1822

why stay insulator is not used with stay wire for 11kv Lines. Whereas it is used for LT lines ?

Essar,

2 10196

Why are cables rated for 40 KA for 0.25 Sec fault current rating?

732


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Un-Answered Questions { Electrical Engineering }

How much no load current of synchronous motor

900


how we can do the insulation on secondary of ct explain and so that tan delta will within limit

762


how ceiling fan worked?

748


what is doid

1427


stand by earth fault protection (51G) for transformer rating 2000 kVA,Dyn11,33/0.400 V. LV NCT ratio and necessary resistor and metrosil values how to calculate

815






how 650 volts creates? where is use?

954


plz tel me syllabus and exam date 4 jr executive engg (electrical)

817


How to configure the drives in PLC, through Profibus commnication. And to how to address it?

1642


salam&hi, i need to know about how can i calculate an enough current for the new building before i submit it to the suppliers

754


What is electrical cable termination

1476


how we provide neutral earth on synchronising panel as per electrical standards?

831


why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

1780


why Current is lead 90 degree and voltage is lag 90 degree in a capacitor.? why Current is lag 90 degree and voltage is lead 90 degree in an inductor.?

870


bsnl tta exam question

744


hi, could someone help me to find a control design for syncronising panel .

633