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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is the rating of HT SUBSTATION and LT SUBSTATION?

NTPC, Sail,

11 57526

Assume a condition such that two motors of rating 6.6kv,415v are connected to blower,so tell me which motor draw large current give appropriate reason?

NTPC, Student,

2 7991

What are eddy current and define rms value?

NTPC,

4 11508

Transformer's core is made up of which material and why so?

ABB, NTPC,

10 32433

Draw the line diagram of diffretial relay connected to transformer?

NTPC,

2498

Name different types of fault and which instrument is used to measures earth,short,open cicuit fault?

NTPC, Vijai Electricals,

6 13796

AC current is flowing in a wire in your home how can you measure it(name of the instrument)

NTPC, TCS,

24 29260

How does and Earth Fault Relay operates in DG set control panel?

Cummins, University,

1 6974

1> what r different types of fault in cables? How will u locate and test these faults? 2> why earth wire is provided on top throughout the transmission line. why not only on towers? How much area it can protect? 3> what r different types of transmission losses? How power loss can be minimized? 4> what is the % of power loss on transmission lines?

IOCL,

3 10904

what type of relays used in transformers?

APTransco, BSNL,

24 66726

What will be the capcity of 3 phase DG set require for 25 KVA single phase lighting load?

Supernova,

7 17886

MCB is used for high rating &MCB is used for lower rating.What is technical difference between ACB & MCB?

7 13016

what is MUSS?

HP,

1 13372

what is phase and neutral.

HP, Voltech,

16 66005

what factors to needed while selecting a MCB and MCCB

3 10623

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Un-Answered Questions { Electrical Engineering }

what is the difference between b c d curves on mcb

1861

Salient pole alternator is more stable, why?

2776

I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?

1925

what is ATS & RING MAIN UNIT in Distribution System?And its Function.

2058

In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

1801

Why does an induction generator is preffered as compared to synchronous generator in especially a wind energy power production project?

2179

what is the range of maximum DOL and SDS can be use for pump and fan application

1169

Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode

2080

a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------

1985

Tell me about ur past electrical maintanence job

1935

What type of DC motor would you see for a lift?

1135

How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?

1831

How to select a contactor? How many types of contactors are available

3351

What are the advantages and disadvantages of the ac motors?

1198

what are the analog quality input for protection function?what are minimum reqiments?

1902

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