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 4369

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 4932

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

Premium Transmission,

4 6142

working method of railway electricl loco in single wire 25000 volt

1 3503

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 3162

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 6636

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

1565

How would you relate your key competencies to this position?

1779

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

BIET,

1463

why is used for starters for staring motors?

Amrapali, L&T,

6 7752

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

4 6193

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,

1800

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 4125

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

2 4278

xlpe cable 4 core nuetral wire is small why ?

3 4088


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Un-Answered Questions { Electrical Engineering }

why actual valve timing diagram is different than ideal valve timing digram of a 4 stroke engine?

5101


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.

3111


Write masons gain formula.

750


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.

941


What is the maximum operating temperature for a thermoplastic insulated cable?

708






Phase control and integral control are used for?

1807


what is the difference between active power and reactive power and apparant power in practical as well as theoritical

1487


Can we check ELCB constantly from R1 to R8 phase in 1 no DB?

1273


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

2696


What is limitedly stable system?

695


how to calculate the distance relay faulty zone?pls explain?

1625


Show the schematic arrangement of diesel power station layout and give its principle of operation.

2597


What is the method to solve circuit using source transformation?

692


In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?

1522


how to decide no of electrodes for 1600A LT Main incomer panel

1216