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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

difference between ac motor and dc motor

5 20078

why aggregate is placed all around substation ground.

9 15152

whats is MARX CIRCUIT?

1 10386

What are the earth resistance Standards of 66kv sub stations according to indian norms.

2 4398

what will happen when a bulb s connected btwn two phases of a three phase delta connected source?

6 9683

why ac supply neutral should earth not in dc (-)

2 6714

Which Kind of machines(in terms of poles) give the smoothest DC

1983

Which type of gas used in cylinder (VCB)?????

ICSA,

15 24811

If I want to use capacitor banks at HT (11 KV) side for maintaining power factor then which type of capacitor should I use? Plz give me the specification?? (I am using 1250 Kva transformer (11 KV/433V)).

2 10677

how to calculate lux level in out door (yard lighting) please expalin with a example

IVRCL,

1 6055

What is the major difference between cnc and plc. why cant we use plc instead of cnc

5 38526

What is difference between ball screw and lead screw.

2 9503

selection of conductor in different voltage?

TATA,

1 3537

What is the most accurate way of testing ELCB?ELCB is better than RCD?

GECO,

3331

what is MFD value in capacitor?I have 201 Kva load & reactive power is 150 Kvar. so how it is calculated?

IIT,

2 9407

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Un-Answered Questions { Electrical Engineering }

Starting Time of LT & HT Motor

1956

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

What are the commonly used schemes for the bus zone protection?

1064

percetans

2187

I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

1669

If SFU is Switch Fuse Unit, What is the expansion for FSHF in Electrical Engineering?

2591

We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?

5150

Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

2784

For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

2996

testing of Vector Group – YNaoD II

2931

I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

1950

How is operate breaker failure scheme in substation

2119

Why the magneti fields are not passes from southpole to north pole

2128

Whether the vacuum contactor requires Short circuit protection?If No,why?

2043

What is the working mechanism of OLTC in Power Transformers????

4326

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