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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Just a silly question but just to make my curious mind bac to normal - Why was not 67 and 67N relays built into a single relay as i have noticed that the R,Y,B CT wiring end up into the 67 relay while the common of the R,Y,B CT wiring end up into the 67N relay. Then it was better if a single relay was manufactured just like the distance relay (21). Another question i would like to ask is - how do we know where the 67 and 67 N relay has to be placed.why is it not placed at the transformer bay? In the substaion that i am working -i have noticed that it is placed between a breaker and a common double bus bar and this line bay is connected to another substation at a remote place which is furthur connected to a load. B U S______CT for 67 & 67N ______Breaker _____ remot s/s. B A R

1 3648

What should be the minimum depth of ground laid 66 kv ht cable?

L&T,

3 8151

IS THE ANY DIFFERENCE B/W GENERATORS & ALTERNATORS

6 8894

what should be the value of proper neutral earthing resistance?

ABC,

3 8010

what is the minimum distance between substation wall and LT panel outer surface?

L&T,

3 12760

what is the IS foe lightning arrester?

2168

How to calculate the Meter constant for the given Meter (by using any formula)

HCL, Viva,

4 78217

What is the difference between a Vacuum Circuit Breaker and a Load Break Switch?

7 28729

Which motor is suitable for mixer grinders.

12 24757

what is earthing/

B.Tech, CPCL, Mobiserv,

3 6329

what is the use of earthing?

CPCL,

1 5583

why we provided electrical earthing?

CPCL,

5 9469

explain the details about vaccum circut breaker and advantages?

CPCL, Unisol,

4 7507

Car battery + terminal allways biger than - terminal! Why?

2 5008

why commutator is attached with only dc macine

ONGC,

8 13310

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Un-Answered Questions { Electrical Engineering }

it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.

2014

What safety precaution are to be taken for avoiding electric hazards ?

1867

what is the method of earthing of a transformer using electrodes?

2274

What is safety of Ht panel

1659

what is electrical machines

3677

what is the working principle of energy saver control panel. please give the complete calculation & theory.

2461

how to test YNyn0 vector group in transformer?

3891

How to calculate no of EARTH PIT? Describe the formula as per IS standard?

3841

- two pumps must work with them at the same time but if the first pump start the second pump must delayed for some time to start also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it

2744

In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

2031

Define peak overshoot.

1271

Why there are some equipment(i.e:TV) that using 2-pin plug instead of three? What happen if there is current leakage? Are we going to get electric shock??

2192

What is the differentional relay...what is the work of this in power Tx. how it is works..

1922

What does the term power factor shows?

1123

what will happen if ac and dc supplies given

2133

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