Interview Questions Answers in Electrical Engineering, Engineering AllOther

Questions / { shyamal mondal }

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What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?

Electrical Engineering 3063

in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.

Electrical Engineering 2278

Answers / { shyamal mondal }

Question { 22336 }

what is S.D.F stands for ? (S.D.F unit 80 amp , TPN )

Answer

S.D.F Stand for 'SWITCH Disconnector Fuse' Unit with
Tripple pole neutral(R,Y,B,N).

it provide more safety compare to general fuse unit.

Is This Answer Correct ?

11 Yes

0 No

Question { Bhel, 46074 }

1.what is bus cuplour and main funtions.
2.what is main function of alternator.
3.how many types of dg oils.

Answer

1)The bus coupler is a protection device including of
Circuit breaker and Isolator,it is connected between two
Bus for Load variation purpose,

2)the main funtion of alternator is generate electric power
by converting mechanical energy(Steam).

Is This Answer Correct ?

12 Yes

5 No

Question { 6373 }

what is hystersis loss?

Answer

hystersis loss

it is the cyclic change of magnetization,caused by rotation
of core in the magnetic field.

Is This Answer Correct ?

4 Yes

3 No

Question { 16682 }

what is the purpose of expansion tank in closed cooling
water system?

Answer

generally this syatem apply in stator cooling water system,
after circulation of water inside the generator it goes Hot
then it go to expansion tank for better circulation, then
it goes to throurh pump,cooler, filter,ionization bed
better circulation of DM water.

Is This Answer Correct ?

2 Yes

7 No

Question { Bhel, 12861 }

Bhel supervision exam question:
If 2 generators are working in a network. And if suddenly the
field of anyone generator weakens. What will happen in the network?
1. The generator will run as motor
2. The generator will run as motor in reverse direction
3. The generator will take lighter load
4. The generator will take more load

Answer

3. The generator will take lighter load

and suddenly speed of the generator will be increase.

Is This Answer Correct ?

7 Yes

5 No

Question { 4940 }

what is induction motor

Answer

induction Motor is AC motor, may be three phase or single
phase,in which rotor has no direct electrical
connection,the rotor rotate by induction effect of stator
winding.

Is This Answer Correct ?

7 Yes

0 No

Question { 6499 }

what is different between synchronous & asynchronous motors

Answer

synchronous motor

in synchronous motor the field is run at synchronous speed
with rotor speed.in this motor speed not depend on load.for
any load the speed will be constant.

Asynchronous motor

in Asynchronous motor the rotor run below the synchronous
speed.in this motor speed depend on load.for increase load
the speed will be change.

Is This Answer Correct ?

12 Yes

0 No

Question { 17177 }

if we supply DC power to AC transformer then what its result?

Answer

Transformer Primary wimding Will get burn.

Is This Answer Correct ?

13 Yes

0 No