Electrical Engineering Interview Questions
Questions Answers Views Company eMail

In directional earth fault protection for generator, one core balance CT is for residual current, what other CT is for, which is placed on neutral?

2 3614

what happen if the supply is given to the stator of the 3phase induction motor with out assembling the rotor ?

1463

HOW TO CALCULATE THE APFC Panel Design

1 3690

what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

1490

1.What is captive power plant? 2.What is national grid?Give brief idea.

1674

does buccholz in a transformer use batteries

2 3821

difference between circuit breaker and switchgear?

L&T,

6 10791

Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv

KPIT,

2 8639

Any Electrical Engineering jobs?Please refer for interviews. Thank you

1392

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

1444

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

2144

what is the difference between an alternator and a synchronous motor

1539

a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 3390

what you mean ct ratio? why use 400/5a,200/5a,150/5a ?

1 2227

what is servo motor & how does it work.

1473


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Un-Answered Questions { Electrical Engineering }

how we control automatic generator i'e with to supply (main supply and local generator) when the main supply was break to supply the local supply automatically to begin supplying power.I now this control circuit is the combination of contactor time delay contactor switch and overload relay .but my question is how we combine those component thank you

1491


Merits & Demarits of Oil circuit & Air circuit breakers ?

1577


What are the factor to be consider for CT selection in 132kV substation?

1598


what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm

4331


What are the essential characteristics of signal flow graphs?

631






Classify drilling machines.

655


What is pi controller?

643


how to measure the current by compact digital equipment with dislay which fit inside any equipment

1449


what is the difference b/w ground & virtual ground?

1818


why induction motors are rated at 0.8 power factor.

1497


Define average demand?

875


what is allowed value of zero sequence impedancce of 6.6 kv nuetral earthing transformer ?what is the actual value

1632


how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

2195


How to calculate the size of earth cable to earth the neutral of UPS ?

1389


What are the Return ( Monthly / quarterly/ Annual submitted to Electical Inspector for an establishment (Factory in Maharashtra-- Small scale category having seperate HT line of 22KV ) as per Maharashtra Electricity Act

1555