Electrical Engineering Interview Questions
Questions Answers Views Company eMail

wath is skin effect?

9 5515

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

1 5951

what is the fuction of electrical transducer in control pannel?

6 3359




which is batter in construction job,ELCB or RCCB?

HCC,

7 12560

whate is aelectrical power fector for exampal

8 6359

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 4913

HOW MANY EARTHINGS REQUIRED FOR GENERATER

Juniper Networks,

10 9767

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

TCS, Bhel, APGenco, IIT, JMRC,

34 49432




if the magnetic lines can pass through a vaccuum area

621

What Is Transformer Impedance ?

Con Edison,

6 11184

How conventional fire alarm system works?

1 852

WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

ACC,

856

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

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

14 142153

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

Essar, Electra Power,

9 10750

what are the safety measure & controls in engine?

RRB,

2 3978


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Un-Answered Questions { Electrical Engineering }

what is different between phase and netural

656


What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

548


what is the Pickup/drop off ratio in BCPU relays

1216


what is meant by directional earth fault and non directional earth fault? describe both.

661


What is the type of earth fault protection used in battery? explain.

1034






Can XLPE/SWB/PVC (P3) 7C X 2.5mm2 be replaced by Can XLPE/SWB/PVC (P2) 7C X 2.5mm2??? P3 vs P2

310


WHAT IS MEANT BY OVER EXCITATION IN GENERATOR TRANSFORMERS? DESCRIBE IT.

1208


What is the mechanism of WTI

511


what is PDU in transformer?? which company manufacture??

445


True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

171


what is the difference between an alternator and a synchronous motor

732


I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com

582


how many parameters can integrate with fire alarm basically ?

730


what is d check in dg 1500kva

738


Is better to supply the voltage for static exciter from the auxiliary power source or from the SG terminals? And why?

584