Electrical Engineering Interview Questions

What happens when generator is running with leading power factor on it say -0.96. what are the effects of it on alternator and the other generators operating in parallel to it.

4988

what is the exact meaning of power

SKB,

2062

why choke is provided in the centre of the tube light?

4770

I want to give Power supply to a house from the Feeder, Total Load of the House is 128 KW, how to calculate cable size for this load ?

9648

what are the problems that generally occur in power flows??

2490

what is the principle of generator , induction motor,d.c motor

3215

WHAT IS FORMULA TO KNOW TO BACKUP TIME OF POWER PLANT 48V/50AMP DELTA POWER PLANT

2862

how can we design robots

1420

what is the maximum demand how it is defined

2931

what is the preventing maintenance of transformer

3821

what is polarity in ac system? and how do identified?

1822

for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

3423

TYPES OF TEMPERING OF ENERGY METER

5687

DIFFERENC BETWEEN VOLTAGE AND CURRENT

3987

WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC

1428

Un-Answered Questions { Electrical Engineering }

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

1717

What is the difference between type1 and type2 relay protection co-ordination for motor feeders

1707

STATE USE OF ARC RUNNERS & SPLITTERS ?

1416

I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

1413

What do you understand by oldham's coupling ?

601

why the value of k is more in shell typr transformers?

1530

Explain in brief description about the operation of DG sets.

1807

What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?

1369

Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

1576

1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

6551

ACB & VCB how do work and saftes and how can maintenance in this and parts name show with picture

1598

What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1295

What is the voltage gain or transfer function of amplifier?

664

In three pin plug 6 amp. 220V ac rating. Why earth pin diameter is higher than other two pin? What its purpose ?

669

how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...

1757