Electrical Engineering Interview Questions
Questions Answers Views Company eMail

WHY IS THE POWER FACTOR NOT MORE THAN UNITY.

6 16478

HAT IS THE EFFECT OF LOW POWER FACTOR ON THE GENERATING STATION?HOW WILL YOU IMPROVE THE LOW POWER FACTOR?

1 4680

EXPLAIN THE TERMS "INTEREST AND DEPRECIATION" AS APPLIED TO ECONOMICS OF POWER GENERATION.

851




WHAT ARE THE EFFECTS OF SERIES RESONANCE AND PARALLEL RESONANCE ON THE CIRCUITS PARAMETERS?

715

EXPLAIN THE FOLLWING: (1) BANDWIDTH (2) SELECTIVITY (3) RESONANT FREQUENCY (4) CURRENT MAGNIFICATION

1 1495

AIR GAP IS TERMED AS USEFUL. WHY?

5 3620

FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

724

DOES A MAGNETIC CIRCUIT CONSUMES ENERGY? IF YES, WHY?

6 5854




IN A MAGNETIC MATERIAL HYSTERYSIS LOSS CAN'T BE REDUCED TO ZERO. HY?

3 2419

WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.

789

STATE AND EXPLAIN SUPER POSITION THEOREM.

ABB,

3 14686

EXPLAIN THE APPLICATION OF RECIPROCITY THEOREM

1 10223

DERIVE AN EXPREION FOR MAXIMUM POER TRANSMISSION, WHAT ARE ITS APPLICATIONS.

714

EXPLIAN THE IMPORTANCE OF POLY PHASE CIRCUIT.

729

Whats difference between a single phase & a three phase motor?

4 12202


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Un-Answered Questions { Electrical Engineering }

features of hbc fuses

730


what is auto re-closer?

1009


hi, could someone help me to find a control design for syncronising panel .

535


what is earth-fault?when it occurs? to check where it occurs what type of test should we do?

805


1. for eg, capacitor is used for many purposes(it act as filter, oscillator, bypass capacitor, memory storage etc...) 2. Please tell me some example circuits for different uses of capacitor( whenever and whereever and however we used capacitor as a filter, oscillator tuning etc..) 3. similarly for inductor and resistors(it act as what?) and when and how we want to act as like that?, and how we can used these components depends upon our requirments with example circuits and explanation? design to act as these components depends

555






is ac supply can store

663


how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???

643


Draw the DOL starter and star delta starter drawing?

1645


what is electrical machines

1713


State the formula for overall efficiency of thermal power station

1754


What is the physical significant of power factor?

577


WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

2576


CPC cable .PVC \1C....I want to get sure that type is flexible indoor or to be install on trench. please advice .thanx :)

569


A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

1654


What is the maximum percentage voltage drop (vd%)for a motor control center

660