Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is the difference between 11kv and 13.8 kv? why we can't used one of these 2 sources?

2 6357

What is maximum rating of transformer ?

2 6097

What is reason of rating of transmission line multi pal of 11 like as 11/33/66/220 ? Why not use 75 kv 23 kv line in power system ?

Apollo, Balco, Bhel, Vardhman,

1 3474

what is the electricity

3 5507

IS THERE ANY ELECTRONIC CIRCUIT TO REDUCE THE NEUTRAL TO EARTH VOLTAGE BELOW 3V ?

1 3449

Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

2 4732

ac and dc motor advandtage,disadvantage,aplication

Apollo,

2 5184

what would happen nif we increase or decrease the capacitor of a flood light.

1 3461

The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

1979

What will happen to magnitude of voltage of other two phases if one phasw will touch the ground?

Construction, NPCIL,

3 6174

What are the factors considered for the selection of cable?

NPCIL,

6 35198

Draw torque - speed curve and load curve of induction motor? mark operating point ?

2057

why distribution transformer are of DY11 type?

4 13737

how to check a three phase induction motor by multimeter & megger?

2 20204

Short circuit current of 2500 KVA 11/0.415 KV transformer both Secondary and primary side. best regards. Ali

1 3814

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Un-Answered Questions { Electrical Engineering }

what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

2189

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1961

How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).

4517

What is VCB? where it is installed at SP. What is SP?

2182

what is vA rating and class of a ct.

1863

What is the formula to calculate the rating of power cable for three phase current.

2137

What difference between ref protection and differential protection ?

1847

what is basic difference betmeen normal & flame proof motor??

2027

What is turn ratio of a transformer?

1237

whats the differece between Exd and Exe

4938

The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

2440

In control room of our one plant there is a continuously the incoming power goes to PC is vary,means in stabilizer it continuously indicate from high input to low and low input to high. what is the reason and its solution.

1974

what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights

1934

how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor

3336

If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

2103

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