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Electrical Engineering Interview Questions
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How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

Siemens,

1311

What will happen if we do not provide earthing to the newtral of a power system ?

Jindal, NPCIL,

2 3560

What is the difference between newtral earthing and body earthing?

JK Lakshmi Cement, NPCIL,

3 4451

give me battery AH calculation in U P S

 1 2947

what is the difference between relay and a contactor.

Siemens,

5 13138

what is the sludge current

 1032

check list for anuval maintatince check list of oil transforms

 2 2598

can volts/Hz be relied upon to use 460v,60Hz electric motors on a 380v,50Hz power supply?

 1 2122

Where double earthing is required? Is there any power specification to have double earthing?

Delphi,

10 36569

What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

Mandovi Pellets,

2 3433

what is a panel board?

 1 2241

Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

 3 2638

can we use the step down transformer to step up transformer

 6 5110

How to design the earth grid for lightning protection in an industry

 2 2787

can we run all LT motors at 360 volts which are normally rated 415+/-10% voltage rating

Meinhardt,

2 2341

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Un-Answered Questions { Electrical Engineering }

what is meant by skew width in machines?

1145

What is servo motor and what are different types of servo motor

1411

would the same effect be achieved by reversing the connection to one winding of the induction motor 3-phase?

921

when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

813

Why do we use center tap transformer that used with portable tools

1316




EXPLAIN USE OF ROCKING ARRANGEMENT IN ELECTRIC HEATING?

928

What is the formuala to calculate the rating of motor protection circuit breaker

1220

which pump used in STP

1174

WHAT IS SPEC OF CLEANROOM MOTOR AND LIGHT FITTINGS?

1332

How to measure current and voltage in an ELV circuit

3126

what is the physical connection of a analog i/p to a analog i/p module (ab plc)and through a analog o/p module(ab plc) to a analog o/p . and how all the process control by scada

1031

how can we calculate the ratio of caustic soda and water in lrs.

4381

How much earthing frequency is capable?

1058

1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done

1003

sir i have a car stereo system and there is jack on him so can u tell me a way to find out their power terminals on the jack or on the circuit board"

980

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