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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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

Siemens,

1585

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

Jindal, NPCIL,

2 4261

What is the difference between newtral earthing and body earthing?

JK Lakshmi Cement, NPCIL,

3 5192

give me battery AH calculation in U P S

1 3435

what is the difference between relay and a contactor.

Siemens,

5 14465

what is the sludge current

1347

check list for anuval maintatince check list of oil transforms

2 3082

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

1 2604

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

Delphi,

10 42368

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 3990

what is a panel board?

1 2714

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 3323

can we use the step down transformer to step up transformer

6 6109

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

2 3345

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

Meinhardt,

2 2902


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Un-Answered Questions { Electrical Engineering }

What is electrical earthing?

483


do we use links in a dc circuit?if so what s its use in it?

1336


Can a generator runs after getting 1st stator earth fault.

824


how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.

1508


hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

1448






How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter

6134


What is the direction of current flow in ct secondary...means if the current is flowing from P1 to P2 then what will be the direction of current flow in ct secondaryw

1251


when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)

1298


what is through fault?

1542


why we are using earth pit in sub stations.?

1392


3phase motor can be used as a Prime mover for alternator.

1001


What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

828


what are the 4 rules to start the motor?

1513


what is the saturation point of crgo lamination.

1471


The screw thread commonly used for transmission of motion is one of the following types of threads

526