Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why HT armoured cable does not glanding

TCE,

3693

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

8 8116

What are the drawbacks of HVDC system?

4 4619

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

3 5645

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

Ozone Pharma, Sperry Plast Limited, Sterling,

2 11053

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

2 5516

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 3801

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 3265

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

3 4074

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 4568

what use can we make of 3rd harmonic component

Bhel, General Motors GM,

5 11720

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

NTPC,

9 37439

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

1490

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

5 5753

what is the difference between energy efficient and high efficiency motors

2 5029


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Un-Answered Questions { Electrical Engineering }

What is the formuala to calculate the rating of motor protection circuit breaker

1719


WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.

1440


what is the efficiency of thyristor

1120


What will happen if i used 11KV earth ht kit to 11 KV / 11 KV cable termination?

987


What is The Resistance Formula

776






What is the difference between circuit breaker and isolator

720


Is it acceptable of installing an earth pit in planters area where bare copper cable, earth rod and connection are susceptible to corrosion due to water?

1473


george phenomenon of synchronous machine

6946


what is difference between earthingpits,earthing grid & earthing mess?

2058


sir i want previous entrance exam papers for written test

1694


Both generator parallel condition shared load equally but one genrator taking ampere more than the other what are all the causes to make like this

1241


why transmission is only 3 phase and not 2 or 4 or poly phases

1706


Batteries. What is the difference between Lead and Nickel batteries ?

1687


Operation of isolators.

1457


what is the grounding Calculation formula? spouse i want to provide grounding to 3phase 18kw motor or i want to provide ground to 3phase 10kva dry type transformere or you give me any exemple...... Thanks.

1460