Electrical Engineering Interview Questions-Part9

What are the different protection systems used to protect the transformer internally and externally?

What are the different ratings of the fuse units for different distributions at your organization?

What are the different protection systems takes place on control panel board?

What is meant by H.R.C fuse?

Electrical Engineering Interview Questions-Part8

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker is closed?

When birds sit on transmission lines or current wires doesn't get shock?

What is the difference b/w winding insulation class and winding temperature class?

Is it possible for a feedback surge to travel over a wireless connection?

What is a DLC? Explain the advantage of DLC over PLC?

Electrical Engineering Interview Questions-Part7

What happen when ac power transmitted in unity power factor

What is the difference between the electrical and electronics

What is the meaning of TRI Vector meter?

What is IGBT? Where it is used? What is the difference between IGBT and Thyristor?

When a square wave is applied to primary of a transformer then what will be output wave form of secondary

Electrical Engineering Interview Questions-Part6

What r the advantage of selecting micro controller type tripping of circuit breaker than relay type tripping?

What is the meaning of BUS?

In step down transformer (415/200V), mistakenly secondary side is connected to 415V for some hours, what would be result of this condition?

What is the difference between negative dc voltage and positive dc voltage because 

some circuit uses -24,-5,-12,- 15,volt dc

If any lead acid battery is having low or high sp.gravity then what will be effect of battery and why?

Electrical Engineering Interview Questions-Part5

How VFD (variable frequency) drive is used as an energy saver....?

What is effect of unbalanced load -- say R 15A, Y 25A, B?

If i want to build 230kv substation what are the equipment’s to be installed?

How power saving takes place through VFD?

How to write program by ladder logic in case of PLC operation?

What is surge suppressor?

Electrical Engineering Interview Questions-Part4

What is the difference between AC choke (inductor) and DC choke (inductor), working and design point of view?

Why secondary of open delta pt (two element pt) center tap is earthed? What happen when this earth is removed?

Alternators are invariably star connected why?

What is the difference between SSR drive& AC drive?

Electrical Engineering Interview Questions-Part3

What is the purpose of coupling capacitor?

What is the purpose of Q-point in transistor?

What is meaning by the SKIN effect in electrical circuits?

Why are we employing star type transformer at transmission end and delta type transformer at receiving end?

What is difference between potentiometer and rheostat?

Electrical Engineering Interview Questions-Part2

How do you detect the exact location of a cable fault if its cable punctures?

When we increase load, current drawn from source also increases why?

What is the reason of power development in synchronous generator due to saliency?

What is the purpose of calculating knee point voltage for Current transformers?

What will happen if we apply dc volt across transformer?

Electrical Engineering Interview Questions-Part1

What is thyristor ?

For an 100kw generator, only 50kw of load is connected. Will the generator generate only 50kw or 100kw? If it generate 100kw what happens to rest of the 50kw. What happens if we connect more than 100kw of load?

Why the supply frequency in INDIA is 50HZ?

What is the power ratio between power in Star and Delta circuit?