Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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 10304

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

9 11242

how to define tell me about self

Bhel,

1999

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

9 11405

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

Punjab National Bank,

3 9072

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 17893

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 21315

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

ABB,

10 17783

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

Thermax,

3 12747

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

7 12506

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

KSK Energy, Reliance,

4 72384

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

Summit Power,

4 8187

why current increases when voltage decreases in ac system

10 28335

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 12514

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

ABB,

11 37286

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Un-Answered Questions { Electrical Engineering }

How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.

2214

WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?

2538

Give some differences between open loop and closed loop control systems.

1168

What is turn ratio of a transformer?

1237

What is the implications when 600 hp motor is started when the unit is running with Transformer of capacity 1500 KVA and DG set of 1000kva

2215

what should be the acceptrd value of winding resistance for 2.5MVA transformer

2303

How many types oil using in transformer ? How many letars using in transformer..?

2109

What is step signal?

1049

following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

2062

why are distributed windings generally used in alternators?

2726

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

1938

how to decide the panel size like MDB ,SMDB PANEL SIZES

7377

Define what is power quality meter ?

1269

What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?

2001

how we start 40w tube light with 4 diodes,2capacitors,1 choke and without starter.(a product avilable in market which lights burnt tube lights also)

2040

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