Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to work meggar?

Anand I-Power,

1352

What is the problem of internal failure in ship engine telegraph system norcontrol?

SAR,

1743

typically in power distribution substation. 1- Any idea how would be the graph of capacitor bank consumption verses time through the day . 2- How is the switching ( on and off ) of the capacitor bank, per need?

Siemens,

1287

What's difference between a400amps lt contactor and a400amps lt circuit breaker

Indian Railways,

3 3495

What is fault clearing time for Current Limiting Moulded Case Circuit Breaker?.

DAE, Hindalco,

1316

why we use delta connection in transformer

UPPCL,

2 3185

Sir 33kva 2 transformer load 900 amp calc 1800 amp mana jayega

Classic Infotech,

1355

i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?

Crown Buildtech,

1345

which is better to use svc or synchronous condenser why ?

1339

neutral carrying current more than phase in 3phase supply.i want to know the reason?

2 2378

Dyn1 transformer vector group testing how to do

1322

the parts of transformers ?

Bhel, Facility management,

1 2886

In the N-series schneider reclosers. What is the difference between current during fault time and current at tripping? This appears in the Event log in an event of a trip out.

Kaytech,

1327

Why short ckt does not happen when solenoid coil connected to supply. as its a wire only.

Siemens,

1 2211

what things to be considered when designing UPS

Aplab, Veta Kipawa ICT Center,

1299


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Un-Answered Questions { Electrical Engineering }

Calculate torque developed by the 3-phase, 5 H.P., 4 pole induction motor runs at 1500 rpm A 23 N-m B 21 N-m C 10 N-m D 0 N-m

4328


Explain different types of d.c motors? Give their applications

638


how can i get the formula to find out the cable size if i know the load of main fuse protection.

1425


draw 3 phase rectifier diagram

1710


Do closed loops systems require manual input?

637






what is The difference between national electrical code and I.S.Code (electrical) and what is the value of NEC in electrical engineering field

1469


draw the full wave and half wave circuit of 3 phase system and inverter circuit used in upsĀ 

1909


prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

1715


If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??

1552


Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

1031


operation of diesel generator

1537


If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

620


BSNL TTA EXAM QUESTION

1761


how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?

1444


what is the difference between Power and Distribution transformers ?

1629