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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm

1274

Why infinite busbar has zero resistance and high mechanical inertia?

2452

Why the transformers making noise?

L&T,

6650

In Indian Railways , how the AC motor is driven? Please explain clearly starting from the overhead 25kV supply.

2495

In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

1142

In a 132KV Grid Station where voltage level is 132KV, here,  why the rating of Surge arrests installed 120KV ?

3317

what is the best way to start a 15 KW motor for pump star-delta or direct on line ? and from how many KW i must use direct on line ?

2081

which has more heat effect(dc or ac)

CCEL, TATA,

4897

How can we prevent the (Home)inverter supply flow to the main supply line?

L&T,

2156

how to calculate KA rating of C.B?explain with Formula.

3907

what is the difference between skin effect

1238

what is the temperature rise test? explain in brief.with formula.

2023

What's mean HVF & HAF in Vacuum Circuit Breaker?

4091

we want to feed 3 phase supply to 70 ton AC load.what will be the size of (3 phase)cable require.

BSES,

4193

why transformer not used to starter

2340

Un-Answered Questions { Electrical Engineering }

how does a shunt reactor maintains the bus voltage???

1106

The slip during plugging operation is given by= A 1-s B 2+s C 1+s D 2-s

1883

How 48-relay (incomplete sequence) functions?

2886

What are the disadvantages of autotransformer?

166

what will be happen if earth point is being used for as a neutral point for raw power , and same will be used for ups earthing

1135

What type of DC motor would you see for a lift?

180

What is the normal phase difference between the voltage and the no-load current in a transformer?

216

in dc shunt motor if field winding is shorted then

974

what is the prosses for getting of 33kv licence (i have completed my engineering degree & working in 33kv substation for contract basis )????

879

Any one who apply for Ferro Scrap Nigam Limited cn join with me at rajuhalder@indiatimes.com or 09669717028

1112

After taking shutdown of 11kv feeder, if you see 5kv by phasing stick in the cable side, is it possible to close earth switch in cable.

1379

how is positive, negative, zero sequence is happen.. how is effect on 3 phase system

799

why the name trunking bus PT

1906

what is ground fault in ACB?

1151

what is the difference between electrical and electronic choke?

1036