| Other Electrical Engineering Interview Questions |
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| Question |
Asked @ |
Answers |
| |
| What is the diff btw Conventional & Addressable Fire Alarm
System??? |
Emerson | 3 |
| how calculate the current faut level |
ABB | 2 |
| During the transients in alternator,the mechanical power
input remains almost constant while the electrical power
output changes significantly.Why? |
| 1 |
| In Railway,why we are used HT Line 25KV ?.why we are not
used 11KV,33KV and others for This? |
RRB | 34 |
| What is vector group? What is meant by DYN11?Why is it needed? |
Areva | 12 |
| what would happen if u assume to insulate all the overhead
lines and no insulators....??do you think it to b an
advantag or a disadvantage??justify. |
| 2 |
| why synchronous motor has zero starting ? |
NTPC | 7 |
| what is V0/V rating of cable |
| 1 |
| what is the difference b/w pvc cu conductor and cu breaded wire..? |
| 1 |
| ( 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 |
| What is difference between Step Up Transformer & Booster
Transformer?
can we used instead of any one? |
CS | 2 |
| how can calculate static 3phase 4wire CT & PT operated
energy meter constant when calibrating using refference
meter suppose we have 11kv/110v PT and 30/5A CT, the meter
constant is 160imp/kwh, where meter is showing MW energy?
give me solution which constant i feed in my refference
meter for calibration of energy meter? |
| 3 |
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