Interview Questions Answers in Electrical Engineering

ranga

{ City } bangalore
< Country > india
* Profession * electrical engineer
User No # 20248

Total Questions Posted # 4
Total Answers Posted # 3

Total Answers Posted for My Questions # 21
Total Views for My Questions # 105551

Users Marked my Answers as Correct # 77
Users Marked my Answers as Wrong # 27

Questions / { ranga }

Questions Answers Category Views Company eMail

why is the core of the underground cable is spiral in shape instead of straight?

Mecon,

8 Electrical Engineering 9983

Why we are mostly using a single 3-phase transformer instead of three 1-phase transformers?

7 Electrical Engineering 12223

what is the diff. b/w restricted earth fault relay & standby earthfault relay and where they are used?

KSK Energy, Reliance,

4 Electrical Engineering 72026

how to calculate cable bending angle in a trench?

Eastern Cement,

2 Electrical Engineering 11319

Answers / { ranga }

Question { IOCL, 10101 }

WHAT IS THE DIFFERENCE B/WDYNAMO&ALTERNATOR?

Answer

A dynamo is a small size dc generator which varies with
load whereas an alternator is a synchronous generator
having a constant speed of rotation independent of load.

Is This Answer Correct ?

23 Yes

0 No

Question { AB Inc, 37164 }

How can w select the cable size for different rating load
& also waht r factors affecting the during selection of
cable?

Answer

cable size primarily depends on its voltage rating or kW
rating of load. From the kW rating, we can calculate the
current that should be carried by cable and the number of
runs required. we also have to calculate voltage drop
during starting and running in case of a motor load.

Is This Answer Correct ?

37 Yes

18 No

Question { Wartsila, 16571 }

can we use metering current transformer as protection
current transformer if not why? & if yes why?

Answer

because protection CTS are rated for high currents than the
metering CTS, so we should not use metering CTs for
protection purpose.

Is This Answer Correct ?

17 Yes

9 No