Electrical Engineering Interview Questions
Questions Answers Views Company eMail

wath is skin effect?

9 5614

How many earthing pits required for diesel generator set ? Why ?

1 6123

what is the fuction of electrical transducer in control pannel?

6 3450




which is batter in construction job,ELCB or RCCB?

HCC,

7 12793

whate is aelectrical power fector for exampal

8 6484

We have 800KW motor operating at 6600Volt,50 Hz supply.During 1st startup it tripped on overcurrent trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad was set on .94 initially.then we set at 0.97 and then it started fine.i dont understand why it tripped first?What are the protections which comes in picture during starting ?

6 4983

HOW MANY EARTHINGS REQUIRED FOR GENERATER

Juniper Networks,

10 10081

what happen when dc shunt motor field is sudden open in running condition

TCS, Bhel, APGenco, IIT, JMRC,

34 50653




if the magnetic lines can pass through a vaccuum area

653

What Is Transformer Impedance ?

Con Edison,

6 11279

How conventional fire alarm system works?

1 889

WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

ACC,

885

how to choose the cable rating for load (KW)? EXAMPLE.50KW load

Siemens, ACC, PowerSol, NCUI, Polycab, SW,

14 146048

whats the diff b/w mpcb and mcb?weather it trips on single phasing or not.

Essar, Electra Power,

9 10933

what are the safety measure & controls in engine?

RRB,

2 4047


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Un-Answered Questions { Electrical Engineering }

What happen if 200 KVAR capacitor connected to power continuesly?

852


two way ckt diagram can be drawn by how many ways? give diagram

648


why the NGR (neutral grounding resistor) always OFF during DG off?

2241


dg earth connect only in the amf panel or not why

764


what the Microsoft .NET framework is?

664






WHY RATING OF VCB NOT LESS THAN 630A

1056


how to calculate earth fault relay current and CBCT ratio

4646


. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

773


For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation

1669


Q: How to calculate Transformer losses , tell us by Formula.

738


how many single tension hardware are required on a double circuit transmission tower?

717


How it can worked plc based electrical system And which type of software using.

908


We have two parts in generator, electrical & mechanical. how it works?

720


Earth leakage relay basic knowledge principle

921


Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

439