Electrical Engineering Interview Questions

why onlyseries motors are used as universal motors? why not shunt?

TCS,

9647

int a,b ; a=b=10 ; if(a>b){ printf ("%d",a)}; no error output is a=10

TCS,

3689

How eddy current generation support the idea of train braking?

1485

Which phase is prefered for connecting 1phase vt used for synchronism in an OHL? why?

3259

which phase is preferred for connecting 1 phase vt used for synchronizing OHL? WHY?

1604

from which formula we select a capacitor rating?

CLG,

1663

Why slip-ring and brushes are not required in squirrel cage induction motor?

L&T,

9073

why normally Generator rating are between 11Kv to 22Kv?

16671

How can Inductive load reduce the line voltage of HV transmission line and vice versa Capacitive load?

3195

what is meant by auto transformer?

5691

what is tandem isolator ??????????

33458

Why delta connected motors are used normally.

5462

what do you call the last pole on a overhead line near a substation

3779

hi this toufik here. i am doing my b.e.degree.now i am in final year and supposed to do a project in this year so i thinking to control the buchholz relay using software base means checking the status of transformer oil using microcontroler, plc or scada. so can i do so...??? alz suggest me...

3473

from which formula we select a capacitor rating?

8312

Un-Answered Questions { Electrical Engineering }

671

What are the causes for the failures of sandwich type (Al) busducts?

1485

formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

1701

A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

736

1.What will be stored in online ups EPROM IC?

1646

what clearance required for 4.5 mva dry type transformer?

1669

Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

1495

Pls explan the OLR setting in VCB at HT yard

2255

SIR, GIVE ME OPGW SAG CALCULATION FORMULA I AM DAE ELECTRICAL. THANKS

6063

How to Calculate Transformer Earthing Electrode Rod Size both Body and neutral Earthing ? Any Standard Formula? Please Suggted

1194

if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

1714

what is the meaning of impedance protected in instrument cooling fan

2872

what is mean by dry frequency

1990

how to calculate earth fault relay current and CBCT ratio

7839

What is “pu” in ee?

687