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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the EMF

2 4145

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

Amway,

3 5222

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

ABB, L&T,

2 5188

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.

2843

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

1 3752

What is the difference b/w RMU & substation

1 5775

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

1 2802

how does excitation of brushless alternator took place?

1 2383

why the substation require din electrical system?

1 3630

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

1 2597

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 3091

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

MahaGenco,

2 3000

How to calculate ant test the burden of Current transformer

NTPC,

1771

1.type of oil in used in transformer.

9 8438

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

ONGC,

1406


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Un-Answered Questions { Electrical Engineering }

How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

1064


What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

709


determine two methods to find loose connection in operational electrical system?

1072


Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB

2127


The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

779






How to Calculate The sag of OPGW in Transmission Line???

2429


In Designing the rating & accessories of a MCCB how to choose the type of releases..means what is the basis for selecting, thermal magnetic, electromagnetic & microprocessr based releases

1463


How can a equal potential zone be carried out in conductors?

612


what is the function and use of cable differential protection relay?

2238


What is q factor?

520


Operation of isolators.

1278


Difference of induction motor & servo motor ??

1146


how to prepare the technical test

1449


i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400

1397


how to find the voltage's of a transmission line plzz help with pictures i am not able to understand

634