Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is the difference between ground and neutral ?

TCS,

2 6220

How to calculate the multiplying factor for energy meter with ct ratio given

1967

using in R,Y& B PHASE LTSIDE(415V)ct ratio 4000/5 WITH ENERGYMETR OF 1280 REV./KWH,240V.WHAT WILL BE MF OF METRE.

HCC,

1 3191

what is DG A,B,C,D check?

1 3868

a induction motar has 30-35% exciting current at no load but in transformer it is only 2-3% ofbrated current why any reason?

century,

1 3544

in short circuit. test of a transformer 5 to 10% ofvrated voltage is used why??? if we use rated voltafe then what will be?

1 3133

in an open circuit. test there is no load curent.. but secondary. ia open then no urrent have to flow but there a smaller current flows why?

Rubber Park,

4 6371

What is the use of starter in tube light fitting.how it works.

JSW,

3 7784

Why Exciter higher ferquency ?

Core Logic,

1 3550

what is the difference b/w UHVDC and HVDC(LIGHT)?

L&T,

4 6588

WHAT IS THE DIFFERENT BETWEEN MCB & MPCB? & HOW IS USE?

Gandour,

3 6287

How i can select current transformer and meters for the upgrading the panal..for 200kw to 600kw....i need to select monitoring and protection ct,s and apmpire meter ,kw meter too.

1 3447

electromechanical relay type identification example : type=tjmh t-stants for j- m- h-

2388

how generator avr give to the input?

1940

DIFFERENCE B/W NEUTRAL AND EARTH?

Genesis, IBC,

2 6305

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Un-Answered Questions { Electrical Engineering }

power transmission pole used one support , that only for support or earthing

1908

What is thresh hold value of current?

2090

I am a electrical engg. diploma holder,applied for junior engineer (electrical),Kolkata RRB. Have I to attend all electrical,mechanical&civil portion in written exam.???

15571

what is the voltage between earth to neutral in lift.

1757

H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....

1844

How to know any size of cable if there are not written on cable? Answer must be theurical not by experience.

2077

what types of cable used in underground coal mining?

1432

What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

2486

7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

2220

what could be the RMS value and average value of a 4 phase sine wave?

1821

During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?

1805

before synchronizing an alternator,power factor is leading ,why?

1500

write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.

2495

Explain difference between stand by earth fault and residual earth fault protection?

1944

Operation carried out in thermal power stations?

1067

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