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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

how i calculate the size in mm of the LT 4 core cable for 100 HP inductive motor pump

1 2184

If u take a kWh reading in 11 kV HT and 440 LV side at same time in yesterday today , then why LT consumed units 3-4℅ high as compared to HT units

Brigade,

1 2553

why ac wave is sinusoidal not square or triangular wave what will be reason

ACPL,

1 2416

what is reason in mv breaker the control supply voltage is dc not ac?

1 2750

what types of cable used in underground coal mining?

1536

condition Autotrip facia come on control panel of electrical transmission line?

Getco,

1634

How to calculate capacitor bank size at a load 800kVA.

1796

what are the reasons of CT circuit faulty in busbar protection scheme?

Getco,

1516

Generator,motor and alternator Working principal Please explain easily

1513

From past few months I am getting lagging pf even though sufficient capacitors used in circuit. Where is the problem pls answer

1498

What is the current carrying capacity of 35sq.mm flexible cable?

1520

What is the technical difference between On delay timer and a Star delta timer?

Roche,

1688

how electrical earthing maintenance done in industry?

L&T,

1696

dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.

1429

why we are not giving the zone 1 trip command to the master trip relay

1820

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Un-Answered Questions { Electrical Engineering }

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1880

why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points

2126

how current is reverse from its normal direction during the fault?

2517

why induction motors are rated at 0.8 power factor.

2069

i have been tasked with a design of protection, metering and control(PMC) relay panel extension to accommodate all PMC relays.There is an already existing panel where this one will be built.What are the design aspects for this kind of project? thank you.

2170

what is the IS foe lightning arrester?

2218

What happens if the series current double?

1530

what is the need to express current and voltage in rms value? rms value is also called as effective value,what is effective value?

2033

What are the conditions for sustained oscillator or what is backhouse criterion?

1205

why +24 v and -48 v give to BTS? If -48v protect from surge then why we not use -24 v?

1902

Connection diagram for KW meter and Kva meter

2416

How to back charge the Gas turbine generator

2214

What is the formula to calculate the no load current of a single & three phase induction motor

2346

Write down the name of 2 lady Bir Pratin of Bangladesh

1953

CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

1715

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