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Electrical Engineering Interview Questions

Why the starting current in Induction Motor is very high as compared to normal rated current ????

13915

What will happen if 60 Hz rated transformer is connected to the supply of 50 Hz say 415 V (3-phase) step up to 3.3 kV...?? ?

5455

Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me

1075

Is earthing done for AC or DC or both?

6085

HOW TO CALCULATE ELECTRICAL, MECHANICAL,& OVERALL EFICIENCY OF GAS ENGINE POWER PLANT

1144

WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

1115

what is diffrence b/w -48vdc and +48vdc ?

3093

Why current transformers are rated in BURDEN instead of VA?

Bhel,

7907

Can RCD's used to protect the VVVF drive if not why.

1291

Is possible to increase the voltage without using transformer? why?

10798

Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

3426

what is meaning of 230volts ac 50hzs ac supply is it rms or maximum to getting ac 230v what amount of max voltage they will send

1131

What is the difference IN MCCB's between thermal magnetic and electronic tripping system ?

1132

i have 2 motor of same rating. on no load condition one motor take 1.6A but other motor is taking 4.8A. what is the reason of this. please explain with proof.

6519

In some countries it is found that an Earthing Transformer is connected at the LV sides of the Transmission and Distribution Substation Transformers.Actually what is the purpose the Earthing Transformer?

2463

Un-Answered Questions { Electrical Engineering }

How maesure earth neutral value & how much maximum value value required in between earth & neutral.

1236

1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

3756

please explain to me how to calculate current,voltage,resistance with formula??

571

Transformer diagram mention each parts ?

1161

is there any phase difference occurs while primary and secondary side mutual induction occurs?

1005

why in the three pin plug all 3 pins are cutted ?

1087

Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics

1504

DERIVE AN EXPREION FOR MAXIMUM POER TRANSMISSION, WHAT ARE ITS APPLICATIONS.

1132

how to determine Sq.mm size of finolex power cables.

1145

which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?

903

What is the maximum No. of out going mccbs permitted from an LV distribution paqnel? What is the ampere relation between incomer and out going switch gears/mccbs?

996

What is a surge supressor why its is used in synchronous generators

1154

Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.

1527

In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

2366

What are the different towers used in 132kv transmission line? what are the differences between the P,R,S towers used in 132KV and detailed explanation

1091