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Electrical Engineering Interview Questions

why table fans rotate clockwise .while ceiling in anti clockwise?

12800

what is fundamental difference between voltage and current

4698

what is negative d.c. voltage, why this voltage is used in base transciever station.

1281

an electric bulb or lamp can operate on ac and dc, if yes then why

4324

what is the difference between the megger and multimeter operation ?

38294

tan delta test of current transformer.

NTPC,

12885

hii.i am a B.TECH(EEE) graduate.i want 2 know wat type of qusns r asked in sbi clerk interview 2 candidates like me??kindly post answers ASAP..

1207

what is mean by lookup table in microprosser.

2613

what is a types of short circuit and what is a types of distance protection tests

1268

How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

NTPC,

3241

A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

1113

ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com

2436

why voltage form factor of PT are increase , when it is ecpected heigher spikes in system. how it is calculated.

HAL,

1092

what is the difference between the following 2 situations ? 1)Line & Neutral=240V Line & Earth=230V Neutral & Earth=10V 2)Line & Neutral=230V Line & Earth=240V Neutral & Earth=10V

4860

What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.

TATA,

1319

Un-Answered Questions { Electrical Engineering }

how to calculate the magnetizing current of ct ( 800A/1A) for Relay 64

613

HOW DO YOU CAN CHECK A 15KV DIODE, WHETHER IT IS OK OR NOT?

1094

How to calculate the multiplying factor for energy meter with ct ratio given

1124

what is the difference b/w ground & virtual ground?

1347

what happens to the supply voltage if there is any change in frequency?

4818

how oti and wti connections are different from each other?

1159

What is the range of the stator resistance of 3 phase induction motor?

1031

hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

1162

how rectifier transformer work in electroststic precipetatore(esp?

1614

detailed procedure how we calculate cost for pcc m10 and rcc m20 including centering and labour excluding steel/ iron

2063

How to Prepare preventive maintenance shedule of machine tool.

1065

HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?

1087

how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

992