| Other Electrical Engineering Interview Questions |
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| Question |
Asked @ |
Answers |
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| Why the brushes used in dc machines are made of carbon not
from other metal? |
| 3 |
| how on load transformer is chnage the Tapping ?
|
| 2 |
| 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 |
| who is make controlling in the reactive power that genarted
in AS genrator(the exitaion currnt or exitation voltge) |
| 1 |
| short circuit test of transformer gives what? |
NTPC | 9 |
| what is thermal setting and magnetical setting? |
| 1 |
|
in three pin pluge there three pins one is phase and second
is earth third is nutral why nutral high diameter compare
with phase and earth |
Radiant | 10 |
| difference b/w eath and neutral |
ABB | 9 |
| what are the industrail measures to overcome ferranti
effect? how would the ferranti effect the power system if
those remedial mearsure arent taken? how often does this
effect occurs in real power system? plz reply |
| 3 |
| what is meaning of bus raiser??? |
| 1 |
| what is the funda of earthing? Explain breifly about
earthing? |
IOCL | 5 |
| ( Re: WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR
CAPACITOR BANK
Answer
# 1 The capacitor current would be kvar x 1000 / (415 x
sqrt3). This would be 70a approx. The MCCB selected should
have *atleast 1.4 times this current i.e. 1.4 x 70= 98. So
you should choose at least 100 A mccb.)
regarding to this answer,i would like to know why the
current have to times 1.4 to get the right amphere for the
mccb.hows the formula to get the 1.4??tq
|
| 2 |
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