Electrical Engineering Interview Questions
Questions Answers Views Company eMail

In legging current reactive power is arise but in leading current which power will be arise ? and in this case, is active power more than rated ?

3 4221

I Have 100Ah battery with 650VA Inverter, i WANT TO TAKE a Solar panel to charge my battery, so please suggest me,what rating of solar panel(with solar charge controller) can buy for a load of 450w for 4 hours

Chevron,

1 4818

What is Star Delta Connection, where it is applied & what for it is used

Premium Transmission,

4 5889

working method of railway electricl loco in single wire 25000 volt

1 3395

A synchronous motor is operating at a leading power factor .if the applied voltage is decreases ,(the excitation remains constant ) ,the motor current a)increases b) decreases c)remains same d) none of these

2 3048

DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

GE,

6 6396

in shunt clippers why a resistor is used in sereis with the input

1479

How would you relate your key competencies to this position?

1726

is it possible to start a motor in felid connected to a remote mcc

BIET,

1384

why is used for starters for staring motors?

Amrapali, L&T,

6 7532

why is fan rotating slow speed, what is the problem?

4 6006

1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.

ICS Integrated Computer Solutions,

1738

why battery dc voltage become Half when we check with respect to ground for example 120volts + and - terminals and when we check + terminal with Earth thats 60volts why 60volts same result on 24Volts and with ground 12Volts only expert answer that thanks we can not ground the battery.

Etimaad,

2 3977

In a incandescent bulb, if the glass is punctured, and then power is supplied, the tungsten filament blows up with a flash.Why?

2 4148

xlpe cable 4 core nuetral wire is small why ?

3 3960


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Un-Answered Questions { Electrical Engineering }

Who many reason of ignition fail ?

1444


i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1287


DEFINE BREAKING CAPACITY OF BUSBAR & HOW IT IS CALCULATED?

4764


What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

981


Electrical Engineering

1469






HOW TO CALCULATE AMPs OF CURRENT TRANSFORMER IN HT Panel

1779


we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1192


Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.

1894


Is there any type of starter for DC motor other than two point,Three point and Four point starters?

1630


How to calculate the input cable rating for 10kva ups (3phase input and single phase output and also 3phase output, battery rating 65Ah)provide the formula also.thnx

1754


What is a DC series motor?

688


which type of effect of turbine and generator reverse power protection ?

3732


in dc series motor if field wdg is shorted then

1421


what is earth pit , how we can measured it, what earth rods reference

2038


What is mean by hot and cold loop testing?

612