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 HT armoured cable does not glanding

TCE,

4237

AC SUPPLY HAVING 230 V FREQUENCY REDUCED ZERO IF MEN TACUCHES THE SUPPLY WEATHER HE GETS SHOCK OR NOT?

8 10344

What are the drawbacks of HVDC system?

4 5941

I have 380.KVA Volva Penta DG set. Tell me how to calculate units from KWH reading....

3 6913

I have 380.KVA DG set how to Calculate the units from DG.

Ozone Pharma, Sperry Plast Limited, Sterling,

2 12292

While performing load test on DC SERIES MOTOR, does the voltage decrease slightly. Why?

2 6499

what is the difference in using the 125% and the 250% factor of safety in calculating circuit breakers capacity for motors,which is more reliable to use the 125% or 250%??

1 4576

sir , what happen if we decrease ( approx 3 inch ) the lenth of shaft in 110KW Induction , three phase motor. actually a 110KW motor is couppled with star couplling to 120TR compressor. When we doing maintenance in compressor it is required to skid the motor backword and resulting dis- alightnment . so we want to change the tyre coupling in place of existing coupling. so it is required to cut off the rotor aprox 3 inch form driving side.

2 4316

what will be the difference on output when 3phase I.M. is given a delta or star supply?

3 5386

The following equipment are installed ia a plant 1. 110KW Induction motor 4 Nos 2. 30 HP motor 3 Nos 3 15 HP Motor 3 Nos 4 7.5 HP motor 4 Nos what is total load of plant if one of each is stand by.

Blue Star,

3 5726

what use can we make of 3rd harmonic component

Bhel, General Motors GM,

5 13378

What is 100% protection of generator? Why 95% protection is used not 100%?

NTPC,

9 40711

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

2000

how the voltage between all the three phase is zero can any body explain me

5 7491

what is the difference between energy efficient and high efficiency motors

2 6158

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Un-Answered Questions { Electrical Engineering }

2423

why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

3148

In vapour absorption refrigeration machine fluids used are

1234

how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

1961

Different types of relay fault which phase sequence??

908

What is the function of the circuit breaker failure relay?

2377

What is mathematical model of a control system?

1143

If I want to connect a capacitor bank on the HT side of a 11kV/415V, 3 phase delta-star distribution transformer to supply Reactive power to it..what practical specifications of a Capacitor bank that can i've??please reply..

2497

What are the basic elements used for modeling mechanical translational system?

1118

What is the test block protection relay if any body know plz explained

1474

how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

4583

How to reduce -234126219.6403 MVAr generation and by what?

1631

howmany electrician should maintain for a 1000 kva used plant... in kerala..

2109

1hp= how much rpm

2076

in 6.6 kv vaccum circuit breaker vaccum bottole vaccum capacity ????

2010

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