Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

how we can calculate cable size of 230v,1 hp single phase motor ? panel to motor distance is 25 meter

4 18246

In induction machine when the load increase the current will increase .why? what is the relation ship between the sleep and current drown by stater?

1 2892

can we run a motor rated 50Hz,415vac,1440RPM At higher speed then rated on name plate with the help of VFD /drive on long term basis.wheater it will effect the motor life

3 7164

In APFC panel, Why on dealy timer is used in Capacitor controlling circuit?

1 9512

How wire size can define in electrical wiring? What is the ratio?

Descon,

2354

i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

1994

WHWT IS USE OF VACCUM CIRCUIT BREAKER

4 8753

IF 5000amp current on LT 440V. then how much it will draw amp on HT 11KV side

10 28867

why reactive power produce in generator? why inductive load absorbe reactive power?

2 6339

what happen if generator exitation lost?

7 13497

what is the basic paramter to set a electric drive

Alpha,

1 4132

what is the physical connection of a analog i/p to a analog i/p module (ab plc)and through a analog o/p module(ab plc) to a analog o/p . and how all the process control by scada

1981

if a number of plc s are there then how many modbus to be used

2005

1) name the communication cable and how it is communicate in between plc to modbus , plc with hmi? 2)name of the communication cables?

1 4451

what is the per unit cost of generation of electricity at thermal,hydro,desael,solar,gas power plant

1 4487

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Un-Answered Questions { Electrical Engineering }

if you are in a software company,then why do you want to come in a core company like sail, ntpc(where lots of trouble like tension but you have a good life in a it company) ?

1968

Explain Even and Odd signals?

1959

What is rotating magnetic field?Discuss elaborately.

2704

In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

2266

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

2028

I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

1915

A mass of 1200g is accelerated at 200 cm/s2by a force. The value of the force required is:(a) 2.4N(b) 2400N(c) 240 kN(d) 0.24N

3060

state the disadvantages of carbon filament???

2994

What happened when capacitor connect series in ac circuit?

1555

What is speed mode?

1770

How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?

2240

which stabilizer is better ? AVR, Servo Stabilizer, Static stabilizer etc & why explain it

2922

how i can calculate the size for fire cable

2094

what is electrical machines

3745

IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM

2242

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