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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Can Induction motor run at over rated speed? ( 15oo rpm is rated speed for 50HZ. is it possible to ride 3000 RPM with same motor with the help of VVVFD for continues ride of 100HZ)

Equate,

3 9556

HT motors are generally connected in star, what will be the effect if we connect HT motor in Delta?

Equate, Ion Exchange,

6 17455

What is the magnetic field (coil DC ) of Turbo Expander?

TATA,

2077

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

Equate,

2169

What the main causes of transient interruptions on Over-Head Distribution Lines?

Orion Laboratories,

2156

how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

6 20264

pls give proper discription of selection of transformer based on particular load.

1 3772

what is a reactive power? what is the relation with power factor?

2190

How can we calculate the motor frame sizes?

Essar,

3413

when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 6033

what is the formula to calculate the fuel consumption of a diesel generator at different diferent load.

Aegis, Network Clothing Company,

4 24890

what is a difference b/w earthing & neutral?

ABB, KEC, Sterlite,

5 11900

why we used star delta starter for above 5hp motors

2 7758

Hi Recently I got one formula that is Impedence of Xformer = Rated KVA/Root 3 * secondry voltage OF Xformer. Is it Right??????

2 4898

Why Powers are named in MW?

1 4502

Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

What is the efficiency during maximum power transfer?

1245

Draw a SLD of HT distribution EB grid up to users Transformer?

6212

How 48-relay (incomplete sequence) functions?

4107

what is there inside an inverter and how it works?

1839

How to determine alternating current frequency?

1158

Explain different types of d.c motors? Give their applications

1132

What is the equivalent circuit of a transformer and its vector diagram?

2693

why the voltage and current in a long transmission line are called travelling wave?

2223

How does a digital electronic meter work??????

2069

why induction motors are rated at 0.8 power factor.

2010

What's the difference between non break power supply and non break non short break power supply

1449

What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?

1917

What is the purpose of using busbar mounting fuse?

2043

what is the chemical name and formula of refrigarent R-134a.

2288

Can 33kva/415v transformer be run underground? If the answer is yes why and if the answer is no why?

1588

For More Un-Answered { Electrical Engineering } Questions Click Here