Interview Questions Answers in Electrical Engineering

what is AMF panel????????

Answer

AMF-Auto mains failure.

This panel normally used in where ever the power neede with
out interept. the concept of the panel is when mains
(transformer supply) fails the the panel controls will
sense and start the genarator and change over will be done
automatically with in setted time.when mains back again the
controls will sence and change over will be done and DG
also will be stopped automatically.

Is This Answer Correct ?

93 Yes

7 No

Question { 9546 }

WHAT IS MEANT BY SYNCHRONISING IN GENSETS

Answer

Two or morethan two numbers of genset connecting in
parellel is called synchronism.

Is This Answer Correct ?

6 Yes

1 No

Question { Infotech, 50462 }

What is the difference between Isolator & Load Break Switch?

Answer

i dont think ther is any different bet wen them tecnically.
just name is different.

Is This Answer Correct ?

5 Yes

89 No

Question { 10877 }

what type of battery used for starting D.G?state its function?

Answer

Its depends on the rating of self motor used in DG.

Is This Answer Correct ?

5 Yes

4 No

Question { 6073 }

how electronic energy meter works?

Answer

what u mean electronic energy meter??

is it digital energy meter???

Is This Answer Correct ?

4 Yes

4 No

Question { 8502 }

1.Can anybody explain Why starters are not used for motor
starting in industries?
2.

Answer

i dont think. In all places ,motors are used to start by
starters only.

Is This Answer Correct ?

6 Yes

1 No

Question { 8502 }

1.Can anybody explain Why starters are not used for motor
starting in industries?
2.

Answer

oh/...well frnd...u must have seen at any small industries.
they must have used be cos of cost.U can never find in any
standard company.it may happen if its very low rating motor
like up to 0.33kw.

Is This Answer Correct ?

1 Yes

0 No

Question { MSPL, 13984 }

What is difference between miniture circuit breaker and
module case circuit breaker up to 63Amp.

Answer

MCB can be used for only over current triping.
MCCB can be used for over current and earth fault(in built)
triping.

Is This Answer Correct ?

14 Yes

4 No

Question { MSPL, 13984 }

What is difference between miniture circuit breaker and
module case circuit breaker up to 63Amp.

Answer

And also difference in short circuit current carrying
capacity.MCB having max up to 25kA. MCCB having up to 50KA.

Is This Answer Correct ?

7 Yes

5 No

Question { 6000 }

what is softstarter?

Answer

It is a starter which can be used to start the motor at
low starting current.At begining motor will be started by
soft starter.after reaching the normal running condition
the soft starter will be by passed.

Is This Answer Correct ?

6 Yes

7 No

Question { Gold Fields, 8868 }

how to check dc current,how to fix ammeter in dc line

Answer

if u want to check current use tong tester. or else put
ammeter in series. thats it.

Is This Answer Correct ?

2 Yes

1 No

Question { 25710 }

why fuse not recomended to neutral

Answer

Neutral is return path of the circuit only. fuse is used to
protect equipments.so while over current or short circuit
circuit to be dicconnected before equipment. so in
neutral ..fuse is not recomended or not required.

Is This Answer Correct ?

54 Yes

17 No

sennapparajan