Question { Microsoft, 77527 }

What is the power factor you maintain at ur organization?

Answer

General Note:
Please understand the question first. And give straight answer to the question. This is what an interviewer expects
Specific:
The question is : What is the power factor you maintain at ur organization?
Give the Power Factor that is maintained in your company. Generally it is 0.95 and above lagging. Power Factor maintenance depends on the State Electricity board rules

Question { 7182 }

what is the difference withbeen lighting capacitor and
motor capacitor?

Answer

All the capacitors are one and the same

In the Motors - For Starting and Power factor Improvement

In the Lighting - Only for Power factor Improvement

N Manivannan
manivannan20@hotmail.com

Question { Emerson, 29695 }

What is the diff btw Conventional & Addressable Fire Alarm
System???

Answer

Addressable detector - Each detector has got unique number
or Address, so whenever there is smoke detection, Control
panel will indicate from which detector smoke was detected-
Easy identification of location. Exact location can be known

Conventional- In the control panel we will have only Zones
from where smoke detected. Several detectors may be
connected inthe zone. We have to rush to the zone and and
identify the zone. Only zone location is known

N Manivannan
manivannan20@hotmail.com

Question { ABB, 33561 }

Why we Specify Transformer rating 433 V Instead of 415V
?

Answer

Appliances rated voltage is 415V. If Trasformer is specied
at 415V, it will further drop down at receving end and
appliances may not work

To compensate Voltage drop at receiving end

Question { 5601 }

As per the theory current doesn’t flows in Neutral, but
practically it is
not applicable, explain why?

Answer

a) ? Is it Single Phase system or 3 phase system

b) If it is Single phase system, full current will flow
thro Neutral. Current flows thro Phase, Load and Returns
thro Neutral. ? Clear

c) If it is 3 Phase system ( Star Connected with Neutral)
and if the Connected LOAD IS BALANCED, No Current will flow
thro Neutral. If the LOAD IS UNBALANCED, Unbalance current
will flow thro Neutral

I will stop with this. Otherwise we have to write more

N Manivannan
manivannan20@hotmail.com