Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Which starter can be used for 3 phase verriable speed (2 stator wdg) induction motor ?

2 3815

What is the principle of Excitation.

1 3453

why electron not flow in open loop,how they know path is open ?

3 4303

what is the operation of UPS ? can any one answer me?

7 7150

UPS battery Back time = no.of Batteries * Ah of the Battery / output KVA * 130 ? what is the 130 means ? can any one help? because all are using this formula how its came 130?

2 5081

why we need to us lenz's law for synchornous motor

Tata Elxsi,

2042

what happens when reactive power increases ? does the reactive power loss increase or decrease ?

2 5528

how can calculate 1kva generator running time in 1 liter keroscene

Kirloskar,

2082

In brushless excitation system how generator field current is measure even if the slip rings are absent?

Adani,

3 7521

In three phase energymeter the spindle rotating backward why?

1 2834

what is the use of neutral displacement relay

OCL,

1 27370

How can we check ELCB trip current sensitivity How can we check earth resistance value

2 16840

The DC current waveform is - . What about the fire alarm waveform?

1 2911

if a single phase 3 hp submersible pump of Crompton Greaves is moving in reverse direction and sometimes it moves in rigth direction ,then what may be the cause....

Crompton Greaves,

2 6810

What is meant by rating error prevention in breaker??

L&T,

1 3389


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Un-Answered Questions { Electrical Engineering }

What is the basic principle of welding process?

1649


how to calculate units consumption for a 12 hp motor /hr.

1014


what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA

2290


what are the ''pitting rings''and how cn they be controlled in a series generator

1341


For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?

1499






What does Bode plot tell you?

784


how can decide the current rating of oltc

1834


RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV is ok ,but haw to calculate the KA rating?

1500


how to enter inverter parameter? without manaual?

1530


We have two parts in generator, electrical & mechanical. how it works?

1480


While HT line put on to activate ACB in low tention panel VCB tripping instantly.why it happens

1558


What is the difference between PLC and Embeded system

948


i've iocl interview.. if you know the interview process please give me information..

1427


we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?

1463


is the value of inductance depends upon the value of thitha in doubly excited machine??

1545