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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how the harmonics are generated in transforemer?

IFFCO,

5 8295

What are the voltage values for LT,HT,EHT and other voltages??

INEL, MNC,

22 100963

Where there is voltage,there must be current.Is this right or wrong??

10 7624

what is the function and use of oil filled cables specify its advantages and disadvantages

Alstom,

7 24328

what type of cables exsisting in the world and how many types

Alstom,

9 10635

what is the difference between LATCH and FLIP FLOP

Wipro,

4 5252

what is resistor

9 7383

what is ground fault current? is there any current flow takes place through ground? is it possible? if it's possible whether it affect human beings on earth near the fault or not?

2 4660

WHAT HAPPEN IF GENERATOR TURBINE IF TRIP?

CEERI,

7 28512

EARTH AND NEUTRAL ARE JOINTED OR NOT?

7 9064

In neutral the current will flow or not?

17 35635

why series motor cannot be started on no-load?

6 23194

AT THE TIME OF INSTALLING THE POWER PLANT POWER IS TAKEN FROM NEARBY GRID AND GIVING THE SUPPLY TO THE GENERATOR WHICH ACTS AS MOTOR. WHAT IS THE NEED OF RUNNING THE GENERATOR AS MOTOR?

6 5506

why ELCB can't work if N input of ELCB do not connect to ground?

5 22977

Why in a three pin plug the earth pin is thicker and longer than the other pins?

LG, NTPC,

18 47178


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Un-Answered Questions { Electrical Engineering }

can anyone show me how the 3 phase power is supplied to socket outlets?

1305


which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?

1336


what happens to the water pump if ground water level is slowly decreasing?our water pump is varying from no-load full-load due to this problem

1022


Does the motor power displayed on the Motor name plate is the mechnical power motor delivers or it is consumed power from the system?

2933


How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?

1335






I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1557


How many kw will suply from one db

921


i have some screw comprressor with 630kw power,i have established them with simple star to delta circuit,by the way there is so much inertia when the screw comprressors start, can you offer me contactors power with 400vac or any cataluge to choose the contactors

1192


what is the Pickup/drop off ratio in BCPU relays

3789


Define phase cross over?

485


Where can I get CPWD electrical specifications & Shedule of rates? Please help me

1626


how to changeover ups in this power failur time?

1312


Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

2292


How to calculate wire length,size & current? ( related to control panel)

1498


how to decide choke rating for drive?

1672