Interview Questions Answers in Electrical Engineering, Metallurgy

Why more sound is produced in mixer than grinder

Answer

High speed which is responsible for more sound from the motor and the jar

Is This Answer Correct ?

1 Yes

0 No

sir.I am OBC candidate,recieved scholarship/freeship during academic year 2011-2012,2012-2013(my yearly income was below 4.5 lakh).my yearly income during academic year 2013-2014 was above 4.5 lakh.should I get scholarship/freeship in academic year 2013-2014 ?

Answer

For central OBC ,income limit has been raised to 6 lakhs by business only . Only the income of parents is to be considered

Is This Answer Correct ?

0 Yes

0 No

Question { Chemanol, 3026 }

What is Chatoliq Protection ?

Answer

Do you mean ' cathodic protection '?

Is This Answer Correct ?

1 Yes

1 No

Question { JK Associates, 9619 }

Why Dyn11 Transformer is selected for distribution transformer?

Answer

Very easy connections

Is This Answer Correct ?

1 Yes

9 No

Question { GPSC Gujarat Public Service Commission, 3364 }

what will be the efficiency off x'mer during no load test and during short circuit test

Answer

Zero

Is This Answer Correct ?

2 Yes

0 No

Question { GPSC Gujarat Public Service Commission, 4882 }

How dc generators direction can be reversed ??

Answer

You mean polarity ? Reverse the DC supply to the field

Is This Answer Correct ?

2 Yes

0 No

Question { 6535 }

difference between buscoupler & bussection?

Answer

Bus coupler - buses are in parallel , Bus section - in series

Is This Answer Correct ?

8 Yes

1 No

Question { Sodexo, 5060 }

why in 3.5 core means 3 core for phase and .5 for neutral?

Answer

Neutral current is undesirable . If 3 phase appliances are predominant or single phase loads are balanced, . the neutral current will be small . Further in protection scheme, the EFR is normally set at 20 % of the rated current . Hence main neutral conductor may be of half the size of phase conductors to save money .

Is This Answer Correct ?

3 Yes

1 No

Question { 2731 }

Why 268hp induction motor taking different current in three different phases?
(In which two phase having same current and one having higher value compare to other 2 phases.)

Answer

Measure the currents on NO LOAD . If there is considerable difference,attribute it to faulty winding

Is This Answer Correct ?

0 Yes

0 No

Question { Greenko Group, 5985 }

What is the Load Capacity of Panther conductor (0.2) and dog conductor (0.1)

Answer

Panther for 30' C rise 487A .for 50'C 526 , Dog - 254 and 311

Is This Answer Correct ?

1 Yes

0 No

Question { 5087 }

explain 100 percent and 95 percent earth faults

Answer

This also applies to stator earth fault in generators . 100 % protection means the whole winding is protected i.e. even the slightest stator earth fault will result in tripping . In 95% , 5% fault is allowed

Is This Answer Correct ?

3 Yes

0 No

Question { 4975 }

what is the voltage level which is used in transformer short circuit test

Answer

V = ( %Z) x V rated / 100

Is This Answer Correct ?

3 Yes

1 No

Question { 2883 }

what happens if you swap F1 and F2 connection in the exiter of the generator?

Answer

Nothing . Reversal of field polarity is recommended to reduce residual magnetism

Is This Answer Correct ?

0 Yes

2 No

Question { 6055 }

TNC switch is also available in 1NO+1NC. What does it mean ?

Answer

They ,being stay put switches ,act as semaphore indicators also

Is This Answer Correct ?

1 Yes

0 No

Question { Sanelec, 5894 }

what happens if we give 1-ph supply for 3-ph Bridge rectifier...??

Answer

It will work as 1 phase rectifier if one of the other two phases is replaced with neutral

Is This Answer Correct ?

7 Yes

1 No

k.prakashchandra