Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why is the core of the underground cable is spiral in shape instead of straight?

Mecon,

8 4446

what s the differenc between electrical &electronis , how to define them

9 4815

how to define tell me about self

Bhel,

689




Can anybody explain Why starters are not used for motor starting in industries?

9 5629

WHICH IS BETTER( FOR POWER SAVING)- ON LINE OR OFF LINE UPS ?

Punjab National Bank,

3 4955

If connected load of Asphalt plant is 375Kw. What suitable KVA DG set is required. What is calculation formula. what extra load have to consider. in what efficiency it will work.

MAHINDRA,

8 10717

what is the suitable voltage of transmission line to transmit 10000w power through 250 km. (a)11kv (b)33kv (c)66kv (d)132kv ]and please tell me whats the logic behind it

ONGC,

7 14303

tell 2 reasons for why only copper is used in domestic wires& only alluminium in transmission lines ?

ABB,

10 10565




what is reactive power ? what its role in transmission lines?

Thermax,

3 8861

Why we are mostly using a single 3-phase transformer instead of three 1-phase transformers?

7 6548

what is the diff. b/w restricted earth fault relay & standby earthfault relay and where they are used?

KSK Energy, Reliance,

4 52705

WHY WE ARE EXPRESSING KW-HR AS UNIT OF ELECTRICITY.........?WE CAN EXPRESS IN ANOTHER UNIT.....?

Summit Power,

4 4605

why current increases when voltage decreases in ac system

10 19230

How does a star connection and delta connection work? How does the star connection save starting current and how does it change to delta?

3 8454

how much loading in terms of ampere can put on 5 MVA,33/11 KV TRANSFORMER having rated current 263 Amp ?????????

ABB,

11 18431


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Un-Answered Questions { Electrical Engineering }

Which of the following alternatives will be cheaper (1) A 100 h.p AC, 3-phase motor (2) Four motors of 25 h.p each (3) Five motors of 20 h.p each (4) 10 motors of 10 h.p each explain

1155


what is the difference betweem star connected motor & delta connected motor?

1053


what is the AC Plant and how can do the work with parts and picture tell us 150 Tr

726


difine electrical ballast in HPSVL

668


1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

717






1sq mm dc powr cable can carry how much dc currnt

610


why on delay timer used for fully automatic star delta starter?

417


what is Different between Bilinear and Unilenier?

792


The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

594


we need a ntpc previous papers

648


SUTIABLE FOR ohm's law super conductor

617


how oltc works in rectiformers of higher rating (27 mva,200v dc,120kamps) please provide me full information with diaggram.

839


A Generator is in running condition and Rotor earth fault alarm is coming.How to check on line(i.e in running condition) whether there is actual earth fault in rotor or not.

631


what is thermal resistance of PVC Cable.

445


Why let through energy not considered for ACB breaker while cable sizing?

967