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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the difference bet ween EDO Type & MDO type ACBs, and what is the advantage EDO Type over than MDO type ACBs.

Siemens,

2 55534

how brushed dc motor operating ?

962

how brushless dc motor is operating ?

4 3663

We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 4154

what happens if power factor is maintained at 0.9?give me the answer in technicall way rather than telling the penality n all

NCC,

5 7212

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

Toshiba,

2581

What is ac and dc drive.

1 5282

What is plc.

2 3283

What is ht lt switchgear.

Bhel, HBL Power Systems,

3 27759

What is lighting kitts.

1132

Why use only DC supply to charge batteries why not AC Supply??

APC, Emerson,

3 5297

can any one suggest paper presentation topies for electrical engg?

1048

1.what is the easiest way to convert AH(ampere hour)to watts?.

2 3104

1.What will be stored in online ups EPROM IC?

IBM,

1133

1.How to calculate backup time from series connected battery of 12v dc with 26Ah for 2battery?

3 7828


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Un-Answered Questions { Electrical Engineering }

Why colled 440V to 3-phase supply.

1181


for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

517


explanation of mesh bus bars

1201


in what type of applications v can use q meter?

1158


why we use circuit breakers for switching instead of normal switching device?

970






How can we calculate the transformer rating if the load calculated is 1000KW (11Kv Supply)?

172


Is it possible to measure the voltage of a battery from a single terminal?

712


I want d.g.set our company

810


how to calculate percentage impedence at 75 deg C at normal tap

1243


explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.

1559


what happens when dc generator coupled with cycle shaft.also explain what happens when its loaded

1185


How many types of electric motors are there?

145


What is a compensator?

177


What are test signals and their significance?

175


what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1087