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 happen when ct secondary are open circuited? why same thing is not happen in ordinary transformer?

BARC,

3 7883

difference between over current and over load protection?

BARC,

5 14994

explain working of differential protection for a transformer?

BARC,

1 3971

derive DC RMS value for half wave rectifier?

BARC,

3146

By just seeing a transmission tower, how can we knew the voltage it carries..?[110kv, 220kv, 400kv...]???

KSEB,

5 8960

what do you mean by cl PS CTs? What are technical details required for it's manufacturing?

1 4085

when voltage increases current decreases & vice versa why it is so?

3 5792

What is meant by inverse definite mean time (IDMT)& definitemean time (DMT)?

5 38227

what is droop control?

BARC,

2096

what do u understand about FACTS? how they are useful?

BARC,

1919

what is significance of B-H curve? how it differs form ordinary transformers to Amorphous Transformer?

BARC,

2 22996

explain with diagram how to protect transformers and substations from over current with help of CT's?

BARC,

1888

how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?

Asahi, BARC, K-Electric,

2732

what is resistance?

5 7352

What is the formula to find out two phase active & reactive power

Areva,

2125

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Un-Answered Questions { Electrical Engineering }

Practical condition in 400KV Sub station:- Breaker(open) , isolator(open), Earthing (close) at both end e.g A & B. Now Open A Stn Earthing than Open B stn Earthing (Which have a 50MVA reactor) , AND suddenly show R,Y,B phase 704KV,573KV,118KV respectively. Que is without closing of breaker how it is possible.???? My Whats app No:07621840498 for Further Discussion. Pls experts suggest.

2034

what is Fan Control Cubicle

2416

what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?

4461

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?

1812

What is line resistance of cable & how it can be measured ?

1438

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?

1810

what are inherent currents?

1972

iam working in power plant. In hot places tube lights are glowing at the end portion only. what is the reason for that?

1854

what is the eight bit unit?

2383

what are the usual topology of transformers at different substations in the power system and why that particular topology is choosen. what are the limitaions of that topology?

2057

Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

2848

what is the difference between online & offline caliberation of KWH meters. Can Digital meters be caliberated

1925

what is the ATS .And how it works.

1545

should %impedance be high or low in a power transformer? if so why?

1862

what purpose to use excaiter in DG.?

2728

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