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 4632

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

9 5045

how to define tell me about self

Bhel,

746




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

9 5803

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

Punjab National Bank,

3 5086

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 10998

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 14896

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

ABB,

10 10790




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

Thermax,

3 9055

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

7 6761

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

KSK Energy, Reliance,

4 54536

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

Summit Power,

4 4709

why current increases when voltage decreases in ac system

10 19840

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 8715

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

ABB,

11 19820


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Un-Answered Questions { Electrical Engineering }

any application of back emf

851


the problem faced on star or delta winding connection??

727


why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A

751


what is the current setting for different relay protection for transformer .

946


A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

802






what is the difference b/w ATS and HTS?

837


hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?

617


what is accuracy ? in any meters , coils accuracy . how can u defined that ?

1086


I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

731


how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

1102


If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

814


What is dynamo?How it works and what is the function of dynamo in a DG.

1387


What is real time power factor control panel(RTPFC)?

2315


i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.

2267


Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.

745