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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the EMF

 2 4952

if the power factor is .88 i want to increase the power factor to .99 what number of capacitor is to add?

Amway,

3 6306

what factor is necessary during design of HT & LT MOTORS.

ABB, L&T,

2 5914

i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.

 3280

How to calculate u.p.s load parsentage plz give me formula

 1 4430

What is the difference b/w RMU & substation

 1 6591

Hi, i want to know is meant by power quality? How it can calculated ? How we can improve?

 1 3422

how does excitation of brushless alternator took place?

 1 3029

why the substation require din electrical system?

 1 4217

can we calculate the diameter of the cable by its cross section?

 1 3221

please design a rectifier with batteries for below requirement and also explain how you calculate this solution, Load = 700Amp DC Backup time = 6 hour. please explain briefly ?????

GNFC,

1 3878

What does the temperature (30 deg or 35 deg celcius) mark on conservator of transformer indicates?

MahaGenco,

2 3884

How to calculate ant test the burden of Current transformer

NTPC,

2212

1.type of oil in used in transformer.

 9 11130

at what basis/standard we have to arrive the current density of aluminium/ copper in busbar?

ONGC,

1913

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Un-Answered Questions { Electrical Engineering }

The series field winding has low resistance while the shunt field winding has high resistance. Why?

1491

for what purpose the star point is done in ct

1205

one conductor length is L.and i am strech uniformly this conductor and made length is 2L.so resistance of this strech conductor is R=4R..but i want to know about area of stech conductor hows it become a/2..

1911

operation of protection relay watchdog contact?

2179

What are the disadvantages of thermal power plant?

861

How to calculate the sag of OPGW during stringing???

2377

What is magneto on a gas generator. how it functions. its out put is d.c or a.c. how it can be checked for correct functioning

1683

how maney type tempereture measurement ?

2050

What is block diagram?

895

How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.

1460

what is the common earth

853

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

1811

calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

3356

Explain the propagation of harmonics in the network and influence of phase angle of harmonics.

1725

what is the use of vcb & isolator in substation?

2119

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