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 4546

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

9 4925

how to define tell me about self

Bhel,

717




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

9 5731

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

Punjab National Bank,

3 5041

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 10897

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 14685

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

ABB,

10 10693




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

Thermax,

3 8984

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

7 6658

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

KSK Energy, Reliance,

4 53796

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

Summit Power,

4 4665

why current increases when voltage decreases in ac system

10 19607

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 8605

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

ABB,

11 19272


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Un-Answered Questions { Electrical Engineering }

What is the most accurate way of testing ELCB?ELCB is better than RCD?

2037


What is dynamo function in DG sets and draw block diagram?

592


Can a generator rated 400 V, 60 Hz be used in a 50 Hz System? Yes or No ? Why ?

392


wat system call?

771


how braking & making capacity of circuit breaker are calculated?

1014






what is the ranje of HT cabel and LT Cabel.

1497


What Normal(Tangent) towers and Tension(Cut-point) Towers?

2557


how much allowable resistance that can be difference in motor all coils?

1009


why we are using earth pit in sub stations.?

732


what shoud be strength and weakness to impress interviewer????????

684


Why 11kv to be generated in generation station

453


what is the significance of cabability curve of alternator

1039


why does a dc machine has high efficiency while working as a generator than as a motor ..

715


Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?

898


any earth foult trip the relay but in welding time not trip by earth foult

1869