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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to work meggar?

Anand I-Power,

1156

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

SAR,

1542

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,

1138

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

Indian Railways,

3 2980

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

DAE, Hindalco,

1170

why we use delta connection in transformer

UPPCL,

2 2700

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

Classic Infotech,

1157

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,

1124

which is better to use svc or synchronous condenser why ?

1178

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

2 2055

Dyn1 transformer vector group testing how to do

1167

the parts of transformers ?

Bhel, Facility management,

1 2569

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,

1150

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

Siemens,

1 1948

what things to be considered when designing UPS

Aplab, Veta Kipawa ICT Center,

1095


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Un-Answered Questions { Electrical Engineering }

Explain the operation of variable frequency transformer?

491


explain single phase series motor

1287


wish of these transformer uses oil?

1011


As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

1016


How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

1284






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?

890


who many types of fire explane with exmple

1562


redundant connection in contactor?

1883


1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

6068


Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.

1088


hi everybody how to design string combiner box (scb) internal parameters like bus bar and spd (surge protection device and fuse which place to set that,and also bus bar one particular cross sectional how much heat generated and how much power loss tell me Clearly and briefly

1319


i want to apper for apgenco or aptransco or related can any one sugest me where can i get previous papers of thouse exams

2661


wat system call?

1359


I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR

1331


why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

1149