Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

1 2677

what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

Suparco,

1546

Why D.C Voltage used in Meggering...as well as in Hipot test? why not A.C?

2 4663

What will be the capacity of the generator set which can be used for my 2 ton window air conditioner ?

1 2729

At what voltage domestic tubelight works?

Cigfil, L&T, MNC,

2 7227

As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?

1376

why generally transformer are in star to delta

3 4399

Is it benefitial to supply 210v ac to lighting fixtures instead of 240v ac?

2 3276

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

Enercon,

6 6706

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

6 6042

To determine the Healthiness of Insulation we will be performing Dielectric tests i.e Insulation Resistance test, Partial Discharge test,Switching Impulse, Lightning impulse, Tan Delta test ...etc why we required to perform this many test, why cant we do only one test. for Transformer, CT's

1 2850

The armature of shunt dc motor has 0.8ohm resistance and motor is to run on 120V circuit.If motor is suddenly thrown on circuit while armature at standstill then current drawn by motor will be??Also back emf in normal running is 110V

2 5499

If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?

4073

why transmission is done in delta system

4 9693

Am i eligible to get electrical supervisor licence? As i did diploma as well as degree in Electrical Engg. in June 2011. Now i am working in 15 MW Power plant from 2 mnths. i belongs to Maharashtra.

1 4376


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Un-Answered Questions { Electrical Engineering }

What will happen if a dc source is given to a tubelight. Will it work or wont it work....

1463


what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?

1457


Hello Friends, How can we recognize the CT Star Point is S1 or S2 in case of Electro Mechanical Relays and what is meant by Restraining coil in relays and what is the purpose of that.. thank you in advance..

1652


what is size of 3phase 4wire cable to be used for 11 ton ductable A.C and how to calculate cable size for different load

3562


What is the maximum number of swithes that can be connected in series up to down stream point in an LV Distribution system?

1504






Why field rheostat is kept in minimum position?

682


1.why we are using blocks in withoutgaplightning arrester 2.why we ar using bushing in withoutgap lightning arrestor

1522


CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415

2216


While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x

1432


i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

1527


what transformer we used normally and upto which kva?

1463


determine two methods to find loose connection in operational electrical system?

1213


what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1451


if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

1638


This is urgent!! What is a Thyristor-based 3-ways selector switch with Zero crossing control? how does it operate and where is it mostly found in a system?

1565