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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the function of commutator in dc motor?

3 3947

why odd hormonics only will effect the power system.why not even hormonics

1 1244

Can any body tell me what is use of END OF LINE RESISTOR in fire alaram circuit?

2 5309

what is different between DIGITAL and ANALOG?

3 3699

Can any body tell me about INNER SHUNT COMPOUND MOTOR diagram?


what is the differnce between vector and phasor? are both same or there is difference between two term.?

6 10818

In batteries after completion of charging which colour gas is emitted from it?


2 2873

(1)Electrical power is generated in KV, power consunmed is in MW and the transformers used are in KVA. How is KVA converted to MW as power being consumed by the consumers? (2)What is vector group of a transformer?

1 2766

Why we are measured insulation resistance applied through DC Voltage?

3 4347

function of soft starter .

2 5874

what is different between DIGITAL and ANALOG?

2 3476

why the voltage level is changed when the unearth cable is earth

2 4132

WhY PF low at Time of PT Missing in HT Meter


2 3511

When One Phase PT Missing (voltage drop ) this time current is zero of This phase(PT Missing Phase) and current is Not Zero of other Phase but PF is always Low That Why



what happenes if two voltage source connected in parallel will be connected to load.

Efftronics Systems,

3 12667

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Un-Answered Questions { Electrical Engineering }

How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?


use of choke in APFC panels


I need model question papers for RRB section engineer Chennai... Please send to my E-mail Id:-


how to know the diffrential relay setting of 06mva step- down (delta-star)transformer?


could anybody able 2 send me jindal steels previous papers fr electrical steam....pls send 2 my id if


As we use capacitior bank in 3ph ckt for improvement of PF, why not we use capacitor in single phase domestric use, at our house their are many inductive equipments,like fan,mixer,tube choke,air conditioner they also draw PF... by using capacitor can they improve PF. if yes--what are advantage and how to connect a capactor in single ph,and which type of capacitor if no- what are disadvantages.


What Should be the value of Vector Surge angle at Tripping and how to calculate it?


what is the use of sdf?


what is meant by motor startup supervision & motor load jam protection ?


What are the application of filter?


is there any chart showing the suitable cable size according to AMP and length ? for three phase motors


What are the components connected in between the power supply coming from an electric pole to HT & LT Panels in a large commercial building or how the power supply connected from Electric pole to Transformer & then to the HT & LT panels of a building? Please send me answers via mail, my id is If possible, please give a line diagram.


how is the incoming cable size calculated for a given current rating of a panel??


why the colour of insultor stack , petticoat is brown. Is it has some technical reason.


How the annunciator works ? How to do its wiring